Re: [GRASS-user] How I can develope code for Polar Diagram(Rose Diagram) in windows
Hamish wrote: anyway, I use this python one which is quite nice. http://youarealegend.blogspot.co.nz/2008_09_01_archive.html http://downloads.sourceforge.net/project/windrose/ Wow, very nice indeed! Thanks for the links! Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Invalid region and coordinates when trying to reproject.
Thanks for the suggestions. Markus: Please post g.proj -p -PROJ_INFO - name : Mercator proj : merc datum : wgs84 ellps : wgs84 lon_0 : 0 k : 1 x_0: 0 y_0: 0 no_defs: defined -PROJ_UNITS unit : metre units : metres meters : 1 Doesn't seem to have a problem, does it? Now I looked at the revised wiki (thanks Hamish) and followed it entirely. It worked. I guess either I hadn't followed everything the last time or this r.region part was really needed. OK, but I have another problem. When I first imported the data to the latlog location, besides being flipped, it appeared stretched in the N-S direction. When I fixed it with region w=-180 e=180, everything fell back to its correct place and it was fine, with no more stretching. Now, when I reprojected it, it is stretched again. Doing g.region in my latlong location, I get a resolution of 5 minutes with rows=2159 cols=4321. When I r.proj -g in the mercator location, following Hamish suggestion, I get Input Projection Parameters: +proj=longlat +no_defs +a=6378137 +rf=298.257223563 +towgs84=0.000,0.000,0.000 Input Unit Factor: 1 Output Projection Parameters: +proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +no_defs +a=6378137 +rf=298.257223563 +towgs84=0.000,0.000,0.000 Output Unit Factor: 1 Input map rbd@ATLANTIC in location GEBCO_GEODETIC: n=46050366.66617828 s=-46050366.66617872 w=-20028233.86541469 e=20028233.86541469 rows=2159 cols=4321 But when I apply the n-s w-e it suggests and r.proj again: Input: Cols: 4321 (4321) Rows: 2159 (2159) North: 89.916705 (89.916705) South: -89.916705 (-89.916705) West: -179.916686 (-179.916686) East: 179.916686 (179.916686) EW-res: 0.083275 NS-res: 0.083295 Output: Cols: 4321 (4321) Rows: 2159 (2159) North: 46050366.666178 (46050366.666178) South: -46050366.666179 (-46050366.666179) West: -20028233.865415 (-20028233.865415) East: 20028233.865415 (20028233.865415) EW-res: 9270.184617 NS-res: 42658.977921 You see? It stretched the NS-res. Is it me or the data? (probably me, of course). Thanks again, Marcello. On Mon, Jul 2, 2012 at 2:47 AM, Hamish hamis...@yahoo.com wrote: Markus: ... | Projection: x,y ... this looks suspicious! Above output may help us to find the problem. probably he was following my tutorial at http://grass.osgeo.org/wiki/Global_datasets#ETOPO1_.28DEM.29 which uses a nasty hack to get around the original grid-registered data exceeding the limits of polar coordinate space: r.in.bin -f in=etopo1_bed_g.flt out=etopo1_bed_g \ n=90.0085 s=-90.0085 e=180.0083334 \ w=-180.0083334 rows=10801 cols=21601 anull=- but the cellhd/ file was not reset in sync with the location. I have now rewriten that wiki entry to use a r.region cleanup method instead of ugly filesystem edits. Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Invalid region and coordinates when trying to reproject.
Makus: What are the extents of the vector in latlon before projecting into the mercator location? Note that regions spanning 180 degrees longitude or more can not be reprojected to mercator locations due to mathematical constraints.20037508.34278924 That's the result of v.info of the of the result of v.in.region | N: 89:55:00.138825NS: 89:55:00.138825S | | E: 179:55:00.069428EW: 179:55:00.069428W This inf looks very suspicious, the latlon vector extents very probably too large and could not be represented in the projection of the target location. Too much for mercator? I am really lost here Thanks. Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Invalid region and coordinates when trying to reproject.
Hamish said: It is impossible to reproject from a simple XY location to a projected location, or vice versa. Simple XY is just like graph paper, with no Earth-based geo-* part to it. It is most commonly used for imagery where x,y are measured in pixels, and manual geo- referencing must be performed, not a reprojection between known coord systems. Yes, I hadn't noticed this xy. Sure it won't work. Start over from the beginning, creating a new lat/lon location and importing your data into it. (assuming that's what the source data's native coordinates are in) I did and it worked flawlessly. sorry for introducing the nasty hack which suggested using xy, Hamish I really don't remember doing that, but anyway, since you updated the wiki page, I cannot press charges against you anymore. Thanks a lot!! All the best, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Correct import of a global grid (0E to 360E) to GRASS (-180W to 180E).
Michael wrote: Which way does it get flipped? Most NetCDF files will import via r.in.gdal correctly, but they are displayed as (from L-R) as 0-180E/180W-0. This is the way that most climate model files are created and then stored. It's not a climate model, but that's exactly the way it gets flipped. Hamish wrote: note I've had some data in the past which either had bad meta- data embedded in it or GDAL was reading wrong. GRASS itself should deal with 0-360 longitudes just fine for raster maps. But if the import goes wrong for whatever reason it is easy to fix by resetting the bounds with r.region. Thanks a lot, that solved it. Believe it or not I never used r.region, so it didn't come into my mind: Simply doing: r.region map=mymap e=180 w=-180 did the trick. Thanks again. Best regards, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Invalid region and coordinates when trying to reproject.
Dear all, After importing a netCDF file and correcting its bounds using r.region so that it spans from -180/180 instead of 0/360, a tried to reproject it in the way I always do, following the GRASS book. I use v.in.region to get the region as a vector, v.proj in a mercator location and then g.region to the projected vector, before applying r.proj to my raster. But when trying to do g.region I get ERROR: Invalid region: Invalid coordinates Following a recent Hamish reply, I noticed that summing the cells I get more than 180 N-S and more than 360 E-W. This time, it's not because the cell size is greater than it should be, but I think that's because the grid is gridline-registered and than GRASS is creating an extra cell in both directions. Although this is not a ETOPO1 grid (but it's in a way based on it), I followed GRASS Wiki and did something like this # reduce region by 1 cell g.region rast=etopo1_bed_g eval `g.region -g` g.region n=n-$nsres s=s+$nsres e=e-$ewres -p # save smaller raster and remove original r.mapcalc etopo1_bed_g.crop = etopo1_bed_g g.remove etopo1_bed_g Now, the new grid is within accepted bounds, but the error persists and the result of v.info of the projected region is ++ | Layer: rbd | Mapset: BRASIL | Location: GEBCO_MERCATOR | Database: /home/marcello/grassdata | Title: | Map scale: 1:1 | Map format: native | Name of creator: marcello | Organization: | Source date: Sun Jul 1 07:55:56 2012 | | Type of Map: vector (level: 2) | | Number of points: 0 Number of areas: 0 | Number of lines:0 Number of islands: 0 | Number of boundaries: 1 Number of faces: 0 | Number of centroids:1 Number of kernels:0 | | Map is 3D: No | Number of dblinks: 0 | | Projection: x,y | N: infS: -4605.12989327 | E: infW: -20037508.34278924 | | Digitization threshold: 0 | Comments: | ++ Obviously, something is wrong with the N and E coordinates. Any ideas? Thanks in advance. Marcello. the problem is with broken cellsize value, resulting in a latitude beyond the north pole. 0.008337679505 * 18000 - 60 ans = 90.07823109 which is 90. it seems that whatever software exported it (don't be afraid to name names :) was holding or calculating the resolution with single-precision floating point numbers but exporting it as if it were a double-precision number. So the second half the number is inexact jibberish. Edit the cell size back to 0.00833 (no small feat with a 3.7gb file, even for vi) and it'll work. Importing with GDAL would give the same illegal-north latitude result, although r.in.gdal now has a '-l' flag to reset the northern boundary into something legal (after which you Must repair it to the real value with r.region), although you could get the same effect by editing the header to lie about the cellsize or southern value to get it to fit into legal lat/lon, then again use r.region to set the bounds exactly. (the resolution as seen with r.info should end up exactly at 30 arc- sec; bypass the built in failsafe checks at your own risk) But the real solution is to get the software that created it to not export broken files. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Correct import of a global grid (0E to 360E) to GRASS (-180W to 180E).
Dear all, I am pretty sure this must be easy, but I just can't find the correct answer. My grid is a netcdf geographic grid that spans from 0E to 360E and from 90N to -90S. I use r.in.gdal to import it, but it gets flipped since GRASS region spans from -180W to 180E. How to do it right? Thanks in advance. Best regards, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Correct import of a global grid (0E to 360E) to GRASS (-180W to 180E).
Thanks for he fast response Daniel: you should be able to define a location with that CRS using either the correct EPSG code or a WKT string. I don't have the EPSG code. Only know that it isin lat long and that long is 0-360. If need be, you can always create a WKT string as well, although I don't know how to do that. Me neither. I will keep trying. Thanks again. Best, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to implement this kind of operation?
DavidRA wrote: Hi, here's the problem: I need to implement an operation in GRASS wich takes an UNDEFINED number of raster layers and, for each position, takes the cell of each raster, sort those values, makes some calculations and store the result in the same position of the output raster. Hey, R.series does all the following calculations for any number of rasters at once: *average, count, median, mode, minimum, min_raster, maximum, max_raster, stddev, range, sum, variance, diversity, slope, offset, detcoeff, quart1, quart3, perc90, quantile, skewness, kurtosis If you need more advanced calculations, I think you will need to use scripting. Or maybe you can tweak the code of r.series to put your own formulas. Best, Marcello. * ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] calculate mode value on moving window (with mapalgebra) with null value cells
G. Allegri wrote: I need to assign values to a the cells on the border of a raster. The inside and the outside are distinguished by having or not having null values assigned. I also need to keep the other cell values (internals) untouched. Hey, Check out r.grow. I am pretty sure you can modify the example given in the manual to find the borders of your raster. Something like: # creates an inverted raster from your raster r.mapcalc raster_inverted=if(isnull(raster,1,null()) # grow this inverted raster by one cell r.grow in=raster_inverted out=raster_inverted_grown # now both rasters overlap at the border, so you can do whatever you want with it, for instance, extract it r.mapcalc border=if(raster_inverted_grown==1 isnull(raster)==0,raster,null()) Hope it helps. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] calculate mode value on moving window (with mapalgebra) with null value cells
OK, sorry for that. So your problem is the famous edge effect that affects us all. Well, I think you have a real problem there. If you find a good solution, please share. Best, Marcello. On Tue, Jun 19, 2012 at 11:39 AM, G. Allegri gioha...@gmail.com wrote: Hi Marcello, thanks, but my problem is not finding the border. I already have it (with its own category) but assigning it the value from the surrounding (not null) value, e.g. max/min/etc. The problem with kernel filters/moving windows is that they do not filter out null values... giovanni 2012/6/19 Marcello Gorini gor...@gmail.com G. Allegri wrote: I need to assign values to a the cells on the border of a raster. The inside and the outside are distinguished by having or not having null values assigned. I also need to keep the other cell values (internals) untouched. Hey, Check out r.grow. I am pretty sure you can modify the example given in the manual to find the borders of your raster. Something like: # creates an inverted raster from your raster r.mapcalc raster_inverted=if(isnull(raster,1,null()) # grow this inverted raster by one cell r.grow in=raster_inverted out=raster_inverted_grown # now both rasters overlap at the border, so you can do whatever you want with it, for instance, extract it r.mapcalc border=if(raster_inverted_grown==1 isnull(raster)==0,raster,null()) Hope it helps. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Add up several maps, which hold different regions, with mapcalc
Büro Seling said: My problem begins, when I now try to add up all these single maps into one larger map. I searched for a solution and tried several things, but nothing worked. Any tipps or hinds? Hey, As always, there is probably a much more elegant solution to this problem, but this should get you going for now: g.region rast=map1,map2 # just to make sure your region encompass everything r.mapcalc bigmap=if(isnull(map1),9,map1)+if(inull(map2),9,map2) # replace nulls on the fly by a specific value that your data does not contain r.mapcalc bigmap=if(bigmap==9,null(),bigmap) # put back the nulls Well, ugly like all my codes, but it works. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Add up several maps, which hold different regions, with mapcalc
I knew it! Just testing you all :) On Mon, Jun 18, 2012 at 12:54 PM, Paulo van Breugel p.vanbreu...@gmail.comwrote: First set the region to fit all maps, like suggested by Marcello. Then, use r.patch to combine the maps. Cheers, Paulo On 06/18/2012 01:36 PM, Marcello Gorini wrote: Büro Seling said: My problem begins, when I now try to add up all these single maps into one larger map. I searched for a solution and tried several things, but nothing worked. Any tipps or hinds? Hey, As always, there is probably a much more elegant solution to this problem, but this should get you going for now: g.region rast=map1,map2 # just to make sure your region encompass everything r.mapcalc bigmap=if(isnull(map1),9,map1)+if(inull(map2),9,map2) # replace nulls on the fly by a specific value that your data does not contain r.mapcalc bigmap=if(bigmap==9,null(),bigmap) # put back the nulls Well, ugly like all my codes, but it works. Cheers, Marcello. This body part will be downloaded on demand. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Euclidean distance (grow.distance) on raster to certain extent?
Tanya wrote: I am trying to run the grow.distance command to create a raster that displays the euclidean distance from an 'orchard' outward to 1108m. I am not trying to measure the distance between 2 non-null features, but simply wish to have the euclidean distance extend out from the orchard to 1108m. I don´t know r.grow.distance or why it is not working for you, but every time I need distance rasters, I use the procedure found in the GRASS book, as follows: r.mapcalc area1=1 r.cost -k in=area1 out=distance_to_orchard start_rast=orchard_location --o --q r.mapcalc distance_to_orchard=distance_to_orchard * (ewres() + nsres())/2. It is an approximate measure, but you can evolve this idea for a better solution for your case. Then you only need to use your buffer as a mask to get the final raster you want or simply use: r.mapcalc final_raster=if(distance_to_orchard=1108,distance_to_orchard,null()) Hope it helps. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Measuring Distance Along a Line
On Wed, Jan 18, 2012 at 4:07 PM, Rich Shepard rshep...@appl-ecosys.comwrote: I have a map with a couple of transect lines that intersect points on a separate map. I want to measure the distance from one end of each transect line to the point which it overlays. While I thought there was a v. module to do this, I'm not seeing it. If it's v.distance, I don't see how to apply that module to measuring a distance along one line interactively. Again, vectors are not my thing, but maybe you could include the end point into your vector and use v.to.db with option=length to get the distance along your line vector. A raster solution to similar problems that you could maybe use somehow is to generate distance maps from target points, lines or areas and then extract the values of these maps through other vectors or using r.mapcalc. I've used this solution in many different cases and it is very nice to see the distance maps. The procedure is described in the GRASS book as: r.mapcalc area_one=1 r.cost -k in=area_one out=distance_to_something start_rast=something r.mapcalc approx_distance_in_meters=dist_to_something * (ewres() + nsres()) / 2.) Hope it gives you some insights. Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Subtracting One Vector Map From Another
On Mon, Jan 16, 2012 at 10:37 PM, Rich Shepard rshep...@appl-ecosys.comwrote: Somehow, my streets map also contains lines for streams. I would like to subtract the stream lines from the street lines but do not see a module to do this. Map algebra works well with raster maps (r.mapcalc), but what module will allow me to do this with two vector maps? Vectors are not my thing, but I checked the GRASS Book... maybe v.select? *v.select* - Selects features from vector map (A) by features from other vector map (B). Best, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Extracting centroids as a raster (and are these centroids really at the center?)
Marcello: Dear all, I need to extract the center of raster areas as another raster. Since my script is totaly raster-based (and I am not used to using vectors), I tried to find some kind of r.thin that would generate the centroids, instead of trying to force the area into lines. Markus: find a script attached which calculated centroids from raster areas. You may expand it with a final r.in.xyz step to write out the calculated centroid(s) as raster map. Hope this helps, Markus Thanks A LOT !! Now the centroids are in the center :) You can see in the attached image the new ones in pink. Great! But I encountered a few problems to get there. I don't know if it is something with me or my system (6.4.0svn on old ubuntu 9.1), but the script wasn't looping correctly over the different areas. It seemed that r.category was ignoring the mask created in the loop and that was causing trouble. So, instead of using r.mask, I actually created a temporary raster containing only the selected area in the loop. I also put the area calculation with r.stats inside the loop. Also, as you instructed, I made the program output the centroid coordinates to a file and then use it as input to r.in.xyz to create the raster. It worked as a charm! Thanks again, Marcello. P.S.; I also attached the modified r.centroid.new if you would like to take a look. I hope I didn't deform your script too much :) http://osgeo-org.1803224.n2.nabble.com/file/n7168100/centroids.png http://osgeo-org.1803224.n2.nabble.com/file/n7168100/r.centroid.new r.centroid.new -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Extracting-centroids-as-a-raster-and-are-these-centroids-really-at-the-center-tp7146840p7168100.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Extracting centroids as a raster (and are these centroids really at the center?)
Dear all, I need to extract the center of raster areas as another raster. Since my script is totaly raster-based (and I am not used to using vectors), I tried to find some kind of r.thin that would generate the centroids, instead of trying to force the area into lines. I believe there is no such module (please correct me if I'm wrong), so I had to use vectors. I then did: - r.to.vect input=raster_areas output=vectorized_areas feature=area - v.to.points in=vectorized_areas out=vector_centroids type=centroid - v.to.rast input=vector_centroids output=raster_centroids use=val I was succesfull, but I have to questions: 1- Is there a better way to accomplish this? 2 - How are these centroids calculated? I ask this because they don't seem to be the actual visual centroid, as the attached image hopefully clarifies to you. The image shows three example areas with the centroids both as an x and as a raster in pink. I thank you all very much for any help and wish you a great new year with a lot of intelectual challenges. Best, Marcello. http://osgeo-org.1803224.n2.nabble.com/file/n7146840/areas.png -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Extracting-centroids-as-a-raster-and-are-these-centroids-really-at-the-center-tp7146840p7146840.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS citation?
Markus: Please use ... GRASS GIS (© 1999-2011 GRASS Development Team) version is 6.4.2svn and the main modules that compose But the version is 6.4.0svn (2010) actually... and then when I talk about a specific module I say like the minimum-watershed-size threshold was set to 100 cells (GRASS GIS 6.4.0svn Reference Manual, 2010)... I suppose you use 6.4.2svn Reference Manual, 2011 ? In truth, I only consult the manual via g.manual module, so I believe it is 6.4.0svn (2010) as well, isnn't it? ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS citation?
OK, thanks. And by the way... congrats on the GRASS paper! On Thu, Dec 15, 2011 at 6:22 PM, Markus Neteler nete...@osgeo.org wrote: On Thu, Dec 15, 2011 at 9:10 PM, Marcello Gorini gor...@gmail.com wrote: Markus: Please use ... GRASS GIS (© 1999-2011 GRASS Development Team) version is 6.4.2svn and the main modules that compose But the version is 6.4.0svn (2010) actually... Of course, if you used 6.4.0svn (2010) then cite it as that. For the more general GRASS citation, see my previous message. Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS citation?
Humm I think you forgot the thing :) , no? On Wed, Dec 14, 2011 at 5:22 PM, Stephen Sefick sas0...@auburn.edu wrote: I saw a paper on this list the other day, but have deleted the original email. Is this the appropriate thing to cite when referring to GRASS GIS in a paper? many thanks, -- Stephen Sefick Auburn University Biological Sciences 331 Funchess Hall Auburn, Alabama 36849 sas0...@auburn.edu http://www.auburn.edu/~sas0025 Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis A big computer, a complex algorithm and a long time does not equal science. -Robert Gentleman __**_ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/grass-userhttp://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] GRASS citation?
Stephen Sefick: I saw a paper on this list the other day, but have deleted the original email. Is this the appropriate thing to cite when referring to GRASS GIS in a paper? Markus Neteler: You may cite as this: (from http://grass.osgeo.org/download/index.php) * GRASS Development Team, 2010. Geographic Resources Analysis Support System (GRASS) Software, Version 6.4. Open Source Geospatial Foundation. http://grass.osgeo.org * GRASS Development Team, 2010. Geographic Resources Analysis Support System (GRASS) Programmer's Manual. Open Source Geospatial Foundation. Electronic document: http://grass.osgeo.org/programming6/ In three days time I will be submitting a paper to Geomorphology where the main research was made entirely with GRASS. I was willing to ask you: right now when I mention I used GRASS I refer to it like ... GRASS GIS (© 1999-2010 GRASS Development Team) version is 6.4.0svn and the main modules that compose and then when I talk about a specific module I say like the minimum-watershed-size threshold was set to 100 cells (GRASS GIS 6.4.0svn Reference Manual, 2010)... Is it correct? If so, should I use the same two aforementioned references at the reference list, but replacing Programmer's Manual by Reference Manual? Thanks for the help. I really want to do it right. Best, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to initialize raster maps.
Moritz: As Glynn suggests: for i = 1 to 10 sum_new = sum + i g.remove rast=sum g.rename rast=sum_new,sum OK, sorry, I got so scared I overlooked Glynn's suggestion. I did another experiment to see the differences in processing time. Since I iterate 1260 times in my script, I tried the following alternatives with i varying from 1 to 1260: 1 - r.mapcalc sum=sum+$i # my suspicious way 2 - r.mapcalc sum_new = sum + $i # Glynn's suggestion after Moritz's explanation g.remove rast=sum --q g.rename rast=sum_new,sum --q 3 - r.mapcalc sum_new = sum + $i # Moritz's suggestion g.rename rast=sum_new,sum --overwrite --q Results: 1 - 125 seconds 2 - 183 seconds 3 - 154 seconds Bottom line: If Glynn says Moritz suggestion with the g.rename --overwrite is OK, I will give back the 30 seconds Moritz had saved me before :) and end up with 30 seconds more of processing time, but with no undefined behaviour. If method number 2 must be used, I will end up with 60 seconds more, what won't do me any harm anyway. Thanks a lot for this interesting exercise. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to find the second largest value in a series of rasters.
Marcello: I have to find the maximum value for each cell in a series of rasters and generate both a maximum value map and a categorical map with the raster number which contains the maximum value. Hamish: see also: http://grass.osgeo.org/wiki/Time_series#Common_legends_for_many_raster_maps it sounds like you have done something similar already, but maybe you could adapt it somehow, or it is faster. I think you'll have to use g.copy + r.null (or better r.reclass) to hide the highest values. Thanks for the ideas. I still haven't quite figured out how to do it without a loop, but I will keep trying. Anyway, I found very useful this kind of expression: for MAP in `g.mlist rast pattern=$MAP_PATTERN` ; do eval `r.info -r $MAP` I didn't know it was possible. Thanks. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to initialize raster maps.
Marcello: But there is no way to avoid r.mapcalc, is there? Hamish: I doubt you'd get very much faster or more efficient even by writing your own C module. (it would probably only take you a minute to create a r.zero module out of the doc/raster/r.example code; just change return x; to return 0; and compile. Well, out of curiosity, I made the changes to r.example and compiled it. I then made a small script that initializes a map with the dimensions of one of my maps ( 677 x 1114) inside a loop using the three approaches mentioned in this thread: 1 - r.mapcalc initialized_map=if(base_map99,1,0) # my very smart method :) 2 - r.mapcalc initialized_map=0 # Moritz method 3 - r.example input=initialized_map output=zero_map # Hamish idea Since I initialize rasters 374 times in my original script, I made the loop in this way. Results: 1 - 49 seconds 2 - 19 seconds 3 - 58 seconds Bottom line: - Thanks Moritz for the tip, it will save me at least 30 seconds from now on. - Thanks Hamish, because I never knew r.example existed and it was fun to test the different approaches. But, no, r.example should stay just as that an example :) Thanks to all. Cheers, Marcello. P.S.: Hamish: tip: to avoid all your scripts breaking when you want to use grass7, always add a space around the '=' in r.mapcalc. r.mapcalc initialized_map = 0 I will keep it in mind from now on. Tks. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to initialize raster maps.
Glynn: Note that using the same map as both input and output results in undefined behaviour. Even if it happens to work, there's no guarantee that it will continue to work in future versions. If you need to implement an iterative algorithm, you should generate a new map, then replace the original with g.remove+g.rename afterwards. Now, you scared me, because my ongoing work is pretty much based on this kind of code. I use r.mapcalc to create maps that serve as counters such as the command i++ in C. I initialize them as zero maps and then based on some logic I keep incrementing them, pretty much like the following pseudo-code to implement a sum: sum = 0 for i = 1 to 10 sum = sum + i end But I do more that that. For instance, if certain conditions are met in other maps at a given iteration and the initialized map is zero, then update the initialized map with the value of i. If not, don't change it. In this way, my map is updated every iteration until no more cells meet the condition or some threshold is met and processing stops. I even use d.rast to display the map as it is being updated. How should I proceed to avoid the undefined behaviour and still get what I want? (I hope I was able to make myself understood :) ) Thanks for your comments. Glynn: There is no point in referring to your original map in the r.mapcalc expression; the result will always be created with the bounds and resolution of the current region. AFAIK, the only modules which don't behave this way are r.in.*, which create the output to match the size of the input file. Yes, Moritz's suggestion showed me that. I perfectly understand it now, thanks. Glynn: I'm sure that there are other ways to create a map consisting of zeros, but there's no reason to suspect that any of them will be faster than r.mapcalc. There really isn't. I just suspected it was taking too long and found out in my little experiment that was only my fault, putting a logic expression where there was no need of it. Setting the region and r.mapcalc zero_map = 0 does the job. Thank you. Best, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to find the second largest value in a series of rasters.
Marcello: My problem is that I also need to find the *second largest* value and the corresponding raster number which contains the second largest value. I am doing that by iterating over all classes through a shell script, but it obviously takes much more time than using a simple r.series command. Can anyone share any idea on how to accomplish that using r.series or something similar? Glynn: There isn't an efficient way to do this using existing tools. If you need the efficiency, I suggest adding a second largest aggregate to lib/stats (based upon c_max.c and c_maxx.c), and updating r.series to use it. Thanks for pointing me the way. I think it is a little beyond my skills, but I might give it a try. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] How to find the second largest value in a series of rasters.
Dear all, I have to find the maximum value for each cell in a series of rasters and generate both a maximum value map and a categorical map with the raster number which contains the maximum value. R.series is, therefore, perfect to accomplish that using method=maximum,max_raster. My problem is that I also need to find the *second largest* value and the corresponding raster number which contains the second largest value. I am doing that by iterating over all classes through a shell script, but it obviously takes much more time than using a simple r.series command. Can anyone share any idea on how to accomplish that using r.series or something similar? Thanks in advance for your thoughts. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/How-to-find-the-second-largest-value-in-a-series-of-rasters-tp7075764p7075764.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] How to initialize raster maps.
Dear all, Inside a loop in a shell script, I keep incrementing the values of a raster map using r.mapcalc with some logical expressions. Therefore, I need to initialize the raster map before the loop itself. Ideally, I would like to initialize it as a raster with the same dimensions as my base map, but containing only zeros. In order to do that, I use the following expression: r.mapcalc initialized_map=if(base_map99,1,0) Besides being one of the ugliest pieces of code one could ever write, it also incurs in waste of processing time. Which would be a more elegant and optimized way of initializing these raster maps? Thanks in advance for any thoughts you could share. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/How-to-initialize-raster-maps-tp7075938p7075938.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to initialize raster maps.
:) how difficult, isn't it? Thanks! But there is no way to avoid r.mapcalc, is there? On Thu, Dec 8, 2011 at 8:04 PM, Moritz Lennert mlenn...@club.worldonline.be wrote: On 08/12/11 22:26, Marcello Gorini wrote: Dear all, Inside a loop in a shell script, I keep incrementing the values of a raster map using r.mapcalc with some logical expressions. Therefore, I need to initialize the raster map before the loop itself. Ideally, I would like to initialize it as a raster with the same dimensions as my base map, but containing only zeros. In order to do that, I use the following expression: r.mapcalc initialized_map=if(base_map**99,1,0) Besides being one of the ugliest pieces of code one could ever write, it also incurs in waste of processing time. Which would be a more elegant and optimized way of initializing these raster maps? Thanks in advance for any thoughts you could share. g.region rast=YourBaseMap r.mapcalc initialized_map=0 Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to find the second largest value in a series of rasters.
Moritz: Since you have the max_raster value, can't you just take that map out of the list you submit to r.series and find the new max_raster and value ? Unfortunately, I can't. There is not on single map which is the maximum everywhere. The calculation is done in a cell-by-cell basis, so different maps have the maximum value locally. Somehow, if after identifying the maximum value, I could make it zero or -, for instance, then I could re-run r.series to get the second largest value, but I don't know how to do it. But thanks anyway. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Generate a box that matches the exact processing region
Hey Antonio, The command v.in.region is exactly what you want. I use that all the time. Cheers, Marcello. 2011/11/23 António Rocha antonio.ro...@deimos.com.pt Greetings I would like to know how can I generate a polygon for the exact computational region (a square). Is this possible? IF so, how can I do that. Thanks Antonio __ Information from ESET NOD32 Antivirus, version of virus signature database 6654 (2023) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __**_ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/**mailman/listinfo/grass-userhttp://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] how to count number of occurrences of a specific category value in the neighborhood of a given pixel
Moritz: Hello, Does anyone see an easy way to count the number of times a specific category value occurs in a given neighborhood of a central pixel ? As always, there is surely a better way in GRASS (probably one single command), but you could binarize your map (1 for your desired category and zero for everything else) and then use r.neighbors method=sum size=desired_neighborhood. The result would be the desired count. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Alternative to r.stats to generate % of surface
Hi Helena,
I have come to the same problem and solved it with ugly and very specific
shell scripts. There is most certainly a better way within GRASS and no
doubt you can code it much better in Shell, but anyway, this may get you
going somehow.
Code snippet:
MAP=$1
g.region rast=$MAP
max_cats=9
file=true_percentages.txt
rm $file
tot=$(r.univar $MAP | grep ^n: | awk '{print $2}')
r.stats -cn $MAP stats.txt
cats=1
while [ $cats -le $max_cats ]; do
ncat=`head -$cats stats.txt | tail -1 | awk '{print $2}'`
cat=`head -$cats stats.txt | tail -1 | awk '{print $1}'`
perc=`echo $tot $ncat | awk '{printf(%.5f, $2 / $1 * 100);}'`
echo $cat $perc $file
cats=$(expr $cats + 1)
done
I wanted everything in text files, so I generated these stats.txt and
true_percentages.txt. The idea of the script is to use the actual cell
count given by r.stats -cn and divide it by the total count given by
r.univar.
Note that this script is very specific and only work for categories that
are incremented by 1. In my case, they go from 1 to 9.
How brave I am to publicize such an ugly script, huh? :) The result sums up
to 1 at least. Just give the name of the categorical map as input.
Hope it helps somehow.
Marcello.
On Tue, Nov 15, 2011 at 9:36 AM, Helena Herrera helenaherrera1...@gmail.com
wrote:
Greetings
I want to calculte % of surface in a raster map for each Integer class
value. The thing is that I'm, using r.stats but the sum % values is always
much more (104 or 102 or 105). Is there any other (more precised) method to
calculate this ?
THanks
Helena
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Re: [GRASS-user] Alternative to r.stats to generate % of surface
See? I knew there was a much better way :) On Tue, Nov 15, 2011 at 2:29 PM, Michael Barton michael.bar...@asu.eduwrote: Use r.report. This will do exactly what you want and output to a file too. Michael C. Michael Barton Director, Center for Social Dynamics Complexity Professor of Anthropology, School of Human Evolution Social Change Arizona State University voice: 480-965-6262 (SHESC), 480-727-9746 (CSDC) fax: 480-965-7671 (SHESC), 480-727-0709 (CSDC) www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu On Nov 16, 2011, at 2:58 PM, grass-user-requ...@lists.osgeo.org wrote: Date: Tue, 15 Nov 2011 11:36:12 + From: Helena Herrera helenaherrera1...@gmail.com Subject: [GRASS-user] Alternative to r.stats to generate % of surface To: grass-user@lists.osgeo.org Message-ID: CACCE9tiQOu_A2Xt82ZdTLwM28eMX8ze= 0zkdhsy97khfi9n...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 Greetings I want to calculte % of surface in a raster map for each Integer class value. The thing is that I'm, using r.stats but the sum % values is always much more (104 or 102 or 105). Is there any other (more precised) method to calculate this ? THanks Helena ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to generate a bigger PNG file
Marcello Gorini wrote: Or I guess you could export it with a larger number of pixels by setting some environment variables. export GRASS_WIDTH= export GRASS_HEIGHT= Glynn: Those will affect the size of images generated by d.* commands using the PNG driver. They won't have any effect upon the images generated by d.out.png. True, my bad, sorry. Once again, I am so used to use d.mon star=PNG etc... that I bypassed the r.out.png part of her e-mail :) Hamish: The book is good, d.out.file is simply using the PNG driver internally. :-) Oh, no, the book is not good... it is awesome! :) It has got me going really fast in the beggining and still helps me a lot. The most usefull book I have by far! n.b. I typically use this when I want to show multiple overlaid rasters in ps.map, which can only display one raster at a time. d.out.file format= geotiff then r.in.gdal + r.composite (or ps.map's rgb instruction). Thanks for the tip! Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to generate a bigger PNG file
Luisa said: I'm using r.out.png to generate PNG files from a small patch (like 6x15 pixels) but I'm obtaining a really small PNG file. Sicne I want to display it a little bit bigger in a website I need to create a bigger (in size) PNG. What can I do to do this? Ben said: You can simply increase the resolution of your current working region. Then you will get more cells (and a bigger image) but exactly the same information. Or I guess you could export it with a larger number of pixels by setting some environment variables. export GRASS_WIDTH= export GRASS_HEIGHT= Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: How to generate a bigger PNG file
My friend, by your intention of helping Luisa, you ended up helping me a lot. I guess I am so attached to the GRASS book that I was conformed to the fact that I could only export the active display monitor by using the PNG driver. D.out.file will help me a lot. Thanks. Marcello. On Thu, Nov 3, 2011 at 3:10 PM, Alexander Muriy amu...@gmail.com wrote: Luisa, you can use module d.out.file ( http://grass.gis-lab.info/grass64/manuals/html64_user/d.out.file.html) with the *resolution* parameter (double size or quadruple of the image). Date: Thu, 3 Nov 2011 12:16:58 + From: Luisa Pe?a luisapena1...@gmail.com Subject: [GRASS-user] How to generate a bigger PNG file To: GRASS user list grass-user@lists.osgeo.org Message-ID: cah+a188ytff79mfg0ya6f9l9w9ockmxsj6bn1yxxpuguoyr...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 Greetings I'm using r.out.png to generate PNG files from a small patch (like 6x15 pixels) but I'm obtaining a really small PNG file. Sicne I want to display it a little bit bigger in a website I need to create a bigger (in size) PNG. What can I do to do this? One idea was to rescale it in a image processing software but I get a low quality image Is there any solution by using grass? Thanks Luisa -- next part -- An HTML attachment was scrubbed... URL: http://lists.osgeo.org/pipermail/grass-user/attachments/2003/6cef341b/attachment-0001.html ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] v.to.points
As far as I know, v.to.points does not write to an external file, it creates a point vector map within GRASS. So you should do output=pointmap and then use another module such as v.out.ascii to generate an actual text file with the points. Also, when you do that, do not enclose the output portion of the code with quotes, you don't need them to set a path to the ouput file. Hope it helps, Marcello. On Tue, Oct 18, 2011 at 9:59 AM, ALT SHN i.geograf...@alt-shn.org wrote: Hello, I'm having problmes with module v.to.points. The input is a line shapefile with only two atributtes (both of them integers). I always get this error message: v.to.points input=AplanadoGRASS@InterpolationTEST type=line llayer=1 output=C:/Users/Andre Mano/Desktop/InterpolationBenchmark/Vectores_Pontos/pontosaplanado dmax=20 -v Nome de arquivo ilegal. O caractere n�o � permitido. Illegal vector map name . Character ':' not allowed. Output vector map name is not valid map name Finished with error I'm using GRASS 6.4 through QGIS 1.7 GRASS plugin in a Windows 7 Professional environment Any hints would be very welcomed!! -- --- Associação Leonel Trindade SOCIEDADE DE HISTÓRIA NATURAL Apartado 25 2564-909 Torres Vedras Portugal Sede e Biblioteca: rua Cavaleiros da Espora Dourada, 27A 2560 Torres Vedras Laboratório de Paleontologia e Paleoecologia: Polígono Industrial do Alto do Ameal 2565-641 Ramalhal http://alt-shn.blogspot.com www.alt-shn.org ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: xy to lat long
Raphael wrote: i have imported the etopo dem (geotifff) into grass. It appears to be in XY and i would like to convert these to lat longs. Markus: But in any case the ETOPO2 will be better (see wiki for an article how to import it). Hamish: yes for ease of import, but not so much for modernity. Historic ETOPO2v2 and ETOPO5 global relief grids are deprecated but still available. Another option is to go for the GEBCO_08 or SRTM30_plus grid. I use to download a gebco grid directly in lat long from https://www.bodc.ac.uk/data/online_delivery/gebco/select/ in netCDF format. Then I literally go by the book and do what the GRASS book tell us. I import the grid into a latlong location using r.in.gdal and generates a vector of the bounding region: r.in.gdal -o input=gebco_input.nc output=gebco_output g.region rast=gebco_output v.in.region output=boundingbox Then I open a projected location, project the bounding box and then the grid: v.proj input=boundingbox location=GEBCO_GEODETIC mapset=MYMAPSET --o g.region vect=boundingbox res=1000 -pa r.proj in=gebco_output location=GEBCO_GEODETIC mapset=MYMAPSET method=cubic --o Of course this is the opposite direction of what you want, but if you go for the gebco grid, it is already in latlong anyway. But then you can use this procedure to project back and forth your grid. Hope it helps, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/xy-to-lat-long-tp6832256p6835646.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Desperate help needed: GRASS can' t find any add-ons anymore.
## SOLVED ## The problem was located in-between the computer and my chair :) Thanks to Hamish for pointing it. Cheers, Marcello. Marcello Gorini wrote: Sorry for this desperate message, but I am having all kinds of troubles in the worst moment ever! My GRASS 6.4.0RC6 on ubuntu 9.10 (old and in need of update, I know) suddenly stopped being able to find all my own shell scripts in the scripts folder and also all add-ons that I had installed. Some kind of path must have been lost, but I have no idea what is going on. If I type for instance: r.fuzzy.system help, it prompts r.fuzzy.system: command not found. But I have been using it forever!! I tried re-installing the add-ons in the same way I have always done, but it still can' t find them anymore. With respect to simple shell modules, If I simply go to the scripts folder, open a working script such as r.mapcalculator and save it as r.mapcalculator2, give appropriate permissions with chmod and try to use it, it gives the same error. GRASS cannot find it! Any ideas? I am in a serious need to get my add-ons functional, so I would really appreciate if anyone could help me on this one (and also my next post please). Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Desperate-help-needed-GRASS-can-t-find-any-add-ons-anymore-tp6806032p6809090.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Desperate help needed 2: can' t install add-ons in other versions of GRASS.
Glynn Clements wrote: It looks like you're trying to build a 6.x add-on against 7.0. Probably because of: svnurl=http://svn.osgeo.org/grass/grass-addons/ For 7, hits should be svnurl=https://svn.osgeo.org/grass/grass-addons/grass7 That' s exactly what I am doing, thanks. I tried the correct way and downloaded r.fuzzy. Again, this is the 6.x version. 7.0 doesn't have r.fuzzy.system as a separate add-on; it has a single add-on named r.fuzzy which provides the modules r.fuzzy.set, r.fuzzy.logic and r.fuzzy.system. You can have 6.x and 7.0 installed on the same system, but they're distinct packages. Add-ons written for one won't work with the other. Thanks for the info. I see that now. I wasn' t able to install it anyway though, it says make: *** No rule to make target `install'. Stop , but that' s something for another day. I was advised not to go into grass 7.0 if I wanted a fast result and that's what I am going to do. Since I eventually managed to get my old 6.4.0svn version up and running again, I am sticking with it for the time being. Thank you very much for your help. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Desperate-help-needed-2-can-t-install-add-ons-in-other-versions-of-GRASS-tp6806040p6809145.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: Desperate help needed 2: can' t install add-ons in other versions of GRASS.
On Mon, Sep 19, 2011 at 6:43 PM, Marcello Gorini gor...@gmail.com wrote: ... I was advised not to go into grass 7.0 if I wanted a fast result On Mon, Sep 19, 2011 at 7:24 PM, Markus Neteler nete...@osgeo.org wrote: ... are you sure about this? Sorry, I must explain better. I am in a hurry to deliver some work, so the advice was in the sense that it would be easier (and worthier) to try to fix my older installation than trying to get around grass 7. No doubt once I get used to grass 7, things will get faster and better, but I would probably loose some precious time with respect to my work at this moment. And since my problem with my usual grass was simply due to my own clumsiness, itś already fixed and I can get straight to work. and that's what I am going to do. Since I eventually managed to get my old 6.4.0svn version up and running again, I am sticking with it for the time being. 6.4.0 is rather old, consider to use 6.4.2svn. Markus I sure will. Thanks for the advice and comments. Cheers, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Desperate help needed: GRASS can' t find any add-ons anymore.
Sorry for this desperate message, but I am having all kinds of troubles in the worst moment ever! My GRASS 6.4.0RC6 on ubuntu 9.10 (old and in need of update, I know) suddenly stopped being able to find all my own shell scripts in the scripts folder and also all add-ons that I had installed. Some kind of path must have been lost, but I have no idea what is going on. If I type for instance: r.fuzzy.system help, it prompts r.fuzzy.system: command not found. But I have been using it forever!! I tried re-installing the add-ons in the same way I have always done, but it still can' t find them anymore. With respect to simple shell modules, If I simply go to the scripts folder, open a working script such as r.mapcalculator and save it as r.mapcalculator2, give appropriate permissions with chmod and try to use it, it gives the same error. GRASS cannot find it! Any ideas? I am in a serious need to get my add-ons functional, so I would really appreciate if anyone could help me on this one (and also my next post please). Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Desperate-help-needed-GRASS-can-t-find-any-add-ons-anymore-tp6806032p6806032.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Desperate help needed 2: can' t install add-ons in other versions of GRASS.
Sorry for this another desperate message, but I am really having all kinds of troubles in the worst moment ever! In order to bypass the problem in my previous post, I installed both GRASS 7.0 from svn checkout https://svn.osgeo.org/grass/grass/trunk grass_trunk and GRASS 6.4.1 from Synaptic in another computer. Then I can' t install any add-ons! Since I get all kinds of errors, I will concentrate in the r.fuzzy.system module since it is the really essential one. In GRASS 7.0: g.extension extension=r.fuzzy.system svnurl=http://svn.osgeo.org/grass/grass-addons/ result: *Fetching 'r.fuzzy.system' from GRASS-Addons SVN (be patient)... Ar.fuzzy.system/flood.map Ar.fuzzy.system/helpers.c Ar.fuzzy.system/local_proto.h Ar.fuzzy.system/flood.rul Ar.fuzzy.system/rule_parser.c Ar.fuzzy.system/main.c Ar.fuzzy.system/system.c Ar.fuzzy.system/description.html Ar.fuzzy.system/f_result.png Ar.fuzzy.system/fuzzylogic.c Ar.fuzzy.system/io.c Ar.fuzzy.system/map_parser.c Ar.fuzzy.system/Makefile U r.fuzzy.system Checked out revision 48345. Compiling 'r.fuzzy.system'... test -d OBJ.x86_64-unknown-linux-gnu || mkdir -p OBJ.x86_64-unknown-linux-gnu gcc -mtune=nocona -minline-all-stringops -O2 -Wall -D_FILE_OFFSET_BITS=64 -I/usr/local/grass-7.0.svn/include -I/usr/local/grass-7.0.svn/include -D_FILE_OFFSET_BITS=64 -DPACKAGE=\grassmods\ -I/usr/local/grass-7.0.svn/include -I/usr/local/grass-7.0.svn/include -o OBJ.x86_64-unknown-linux-gnu/fuzzylogic.o -c fuzzylogic.c In file included from fuzzylogic.c:1:0: local_proto.h:106:5: error: expected specifier-qualifier-list before ‘RASTER_MAP_TYPE’ make: *** [OBJ.x86_64-unknown-linux-gnu/fuzzylogic.o] Error 1 ERROR: Compilation failed, sorry. Please check above error messages.* I have no idea what local_proto.h:106:5: error: expected specifier-qualifier-list before ‘RASTER_MAP_TYPE’ means! I have found the following thread: http://permalink.gmane.org/gmane.comp.gis.grass.user/40781 but no real answers. Then I downloaded it using: svn checkout https://svn.osgeo.org/grass/grass-addons/raster/r.fuzzy.system/ then cd to the r.fuzzy.system folder and, following GRASS wiki (http://grass.osgeo.org/wiki/Compile_and_Install#Addons): make MODULE_TOPDIR=/usr/local/grass-7.0.svn But I get: *gcc -mtune=nocona -minline-all-stringops -O2 -Wall -D_FILE_OFFSET_BITS=64 -I/usr/local/grass-7.0.svn/include -I/usr/local/grass-7.0.svn/include -D_FILE_OFFSET_BITS=64 -DPACKAGE=\grassmods\ -I/usr/local/grass-7.0.svn/include -I/usr/local/grass-7.0.svn/include -o OBJ.x86_64-unknown-linux-gnu/fuzzylogic.o -c fuzzylogic.c In file included from fuzzylogic.c:1:0: local_proto.h:106:5: error: expected specifier-qualifier-list before ‘RASTER_MAP_TYPE’ make: *** [OBJ.x86_64-unknown-linux-gnu/fuzzylogic.o] Error 1 * I won't comment on my tries with GRASS 6.4.1 so that this email does not get excessively long, but no need to say that I had no success. I am in a serious need to get any GRASS installation up and running with add-ons, so I would really appreciate if anyone could help me on this one (and also my previous post please). Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Desperate-help-needed-2-can-t-install-add-ons-in-other-versions-of-GRASS-tp6806040p6806040.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: How to extract one single contour.
Also, even when I zoom in to extract only one contour, the exported points are not always in order in the file, in a way that when I use it to plot in another program as a line, it connects the points in a wrong way. How can I export contours in an amenable way to use in other programs, such as Matlab, for instance? Thanks in advance. Marcello. Marcello Gorini wrote: Dear all, I am interested in extracting the longest -1,000 meter contour from a bathymetric DEM and to save it in a text file as points. By doing: r.contour in=my_dem out=contour levels=-1000 v.to.points in=contour out=contour_points dmax=my_resolution v.out.ascii in=contour_points out=contour_points.txt fs= dp=4 ... I get a text file with the contour points, however, it includes many different isolated contours, all with the same category (1). Since I need only the longest, I believe I need to separate the different contours, maybe assigning different categories somehow, then maybe updating the database with v.to.db using option=length and then v.db.select the longest contour. But I am not very used to working with vectors, so I don't know if that's the correct approach (nor how to accomplish it), so I would appreciate very much any help. Many thanks. Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/How-to-extract-one-single-contour-tp6639491p6641376.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] How to extract one single contour.
Dear all, I am interested in extracting the longest -1,000 meter contour from a bathymetric DEM and to save it in a text file as points. By doing: r.contour in=my_dem out=contour levels=-1000 v.to.points in=contour out=contour_points dmax=my_resolution v.out.ascii in=contour_points out=contour_points.txt fs= dp=4 ... I get a text file with the contour points, however, it includes many different isolated contours, all with the same category (1). Since I need only the longest, I believe I need to separate the different contours, maybe assigning different categories somehow, then maybe updating the database with v.to.db using option=length and then v.db.select the longest contour. But I am not very used to working with vectors, so I don't know if that's the correct approach (nor how to accomplish it), so I would appreciate very much any help. Many thanks. Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/How-to-extract-one-single-contour-tp6639491p6639491.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Mapcalc to replace a range of values
r.mapcalc new_raster=if(old_raster-0.01 old_raster0.01,0,old_raster) Cheers, Marcello. On Wed, Jul 13, 2011 at 10:10 AM, Rebecca Bennett rabenn...@ymail.comwrote: Hello Grass users, I have a (hopefully) quick question - I would like to replace all values in a raster that fall in the range -0.01 to 0.01 (i.e. 0.01-0.01) with 0 but can't quite work out how to express this in mapcalc. Can anyone set me on the right track? Thanks for reading, Rebecca ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Monte Carlo realizations of categorical maps.
Dear all, This is just a follow-up of my original message as I promissed. It has been two weeks since I tried to contact the author, but received no response. I eventually used a workaround based on r.random.surface itself. I added random fields to the original continuous parameters instead of using the categorical maps. It is not the same thing, but it was enough for me. Anyway, if anybody gets any info with respect to the r.random.model module, it would be interest to hear about. Thanks. Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Monte-Carlo-realizations-of-categorical-maps-tp6502447p6550076.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] R.fuzzy.system bug/limitation or just me ?
Dear all,
I am using r.fuzzy.system for quite a while now, but still have a persisting
bug/problem that I can't solve. Hopefully it is just me doing something
wrong.
A use a GRASS/Shell script to automatically parse the input .map file (that
contains all the fuzzy sets definitions) and update it with values based on
some input raster's statistics. The problem is that I get errors depending
on these values, but they don't make sense to me.
A wrong fuzzy set definition and the corresponding error is as follows:
Fussy set (*wrong*):
%Xmargin_crosc_3
$ concave {right; -0.014310,-0.009618; linear; 0; 1}
$ planar {both; *-0.014310,-0.009618,0.010177,0.015142*; linear; 0; 1}
$ convex {left; 0.010177,0.015142; linear; 0; 1}
Error:
*ERRO:Map: Xmargin_crosc_3, Membership: planar: Points sequence must be
non-declining*
If I am not mistaken, the sequence [-0.014310,-0.009618,0.010177,0.015142]
is non-declining, is it not?
Now, if I take one decimal place out, it works nicely.
Fussy set (*OK*):
%Xmargin_crosc_3
$ concave {right; -0.01431,-0.00962; linear; 0; 1}
$ planar {both; *-0.01431,-0.00962,0.01018,0.01514*; linear; 0; 1}
$ convex {left; 0.01018,0.01514; linear; 0; 1}
But it is not a question of decimal places, I believe, because if I keep the
original 6 decimal places, but multiply the original input data by 100, it
also works nicely.
Fussy set (*OK*):
%Xmargin_crosc_3
$ concave {right; -1.431014,-0.961829; linear; 0; 1}
$ planar {both; *-1.431014,-0.961829,1.017739,1.514197*; linear; 0; 1}
$ convex {left; 1.017739,1.514197; linear; 0; 1}
But even more confusing is when I allow 9 decimal places in the fuzzy set
definition. Then I get a very strange error:
Fussy set (*wrong*):
%Xmargin_crosc_3
$ concave {right; -0.014310295,-0.009618395; linear; 0; 1}
$ planar {both; *-0.014310295,-0.009618395,0.010177389,0.015141969*; linear;
0; 1}
$ convex {left; 0.010177389,0.015141969; linear; 0; 1}
Error:
*ERRO:Map: Xmargin_crosc_3, Variable: planar: Points must be numeric but
is: or space between '-' and digit*
So I am really stuck here. I am very sorry for this boring post and problem,
but it is very important for me to get it solved. Eventually, I would like
my complete work to become a GRASS Add-on (if there will be interest from
the GRASS community), but I don't want to put some ugly workaround in the
code (as it is right now).
Thanks a lot for any help (or even just for reading this long post).
Marcello.
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[GRASS-user] Re: Monte Carlo realizations of categorical maps.
Hamish wrote: also, for a categorical map you might try r.to.vect + the v.random.cover module for GRASS 6 from addons: http://grass.osgeo.org/wiki/Addons#v.random.cover v.random.cover is a shell script for creating random points constrained within an irregularly shaped vector area. (v.random places points only in current region rectangle). Optionally the user can upload raster values at the points. See also 'r.random cover= vector_output=' Thanks for your comments Hammish. I am not sure how to do it this way, but yes, there is probably a workaround. For now, I will just wait for a response from the author. Rainer: so why not contact the author? Hamish: (he still emails comments from time to time, so your chances are good. let me know if the email you tried was too old, I may have a newer one somewhere) I tried: charles.r.ehlschlae...@usace.army.mil Let's see if it works. Thanks a lot, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Monte-Carlo-realizations-of-categorical-maps-tp6502447p6508407.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Monte Carlo realizations of categorical maps.
On Wed, Jun 22, 2011 at 2:24 AM, Marcello Gorini lt;gor...@gmail.comgt; wrote: Deal all, I am interested in a module that seems to be discontinued since GRASS 4. It is called r.random.model and it is used for Monte Carlo realizations of categorical maps. Rainer: Me to - sounds really interesting. But even a google search did not result in anyhing - so why not contact the author? And please post your findings here! I just sent him an e-mail. I sure will post any response here. Thanks for your interest. Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Monte-Carlo-realizations-of-categorical-maps-tp6502447p6506921.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Monte Carlo realizations of categorical maps.
Deal all, I am interested in a module that seems to be discontinued since GRASS 4. It is called r.random.model and it is used for Monte Carlo realizations of categorical maps. I found the reference for this module in the man page of r.random.surface, more specifically in http://chuck.ehlschlaeger.info/older/acm/paper.html Can anybody help me find/use this module or any other GRASS tool that could achieve similar results? The overall idea is to generate spatially autocorrelated random realizations of categorical maps based on a set of probability maps for each category. Thanks in advance. Best regards, Marcello Gorini. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Monte-Carlo-realizations-of-categorical-maps-tp6502447p6502447.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Duplication of lines in output of r.profile.
Marcello wrote: I solved it using: d.where map_profile instead of: r.profile -ig input=map output=map_profile The only problem is that I can't see the points while I am digitizing. Hamish wrote: use the middle mouse button with d.where to show the line. Yes, thanks, it helped. Then I can see the line after I digitize it, but the good thing about r.profile is that you can see it WHILE you are digitizing, so you can get your bearings better. But that's a minor problem anyway. I get many duplicated lines, some of which are not exactly duplicated, but displace the coordinates by a very small distance, affecting also the distance. Hamish asked: what version of GRASS? what kind of machine/OS? It's GRASS 6.4.0svn on a Linux Ubuntu 9.10, sorry not to have said it before. how about if you trim off the 3rd,4th columns from what becomes the input file? OK, so I tried this: r.profile -ig input=map output=map_profile cat map_profile | cut -d' ' -f1,2 | r.profile -g input=another_map output=another_map_profile --o Was that what you meant? I get the same weird results, unfortunately. Any other ideas? Thanks for the help, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Duplication-of-lines-in-output-of-r-profile-tp6242694p6245727.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: create 3D raster and display
Janet Choate said: i want to display a raster in 3D. i.e. display landscape maps 'draped on top' of the dem so i can show the terrain in 3D rather than as a flat image. do i need to convert a raster to a 3D raster via r.to.rast3 or r.to.rast3elev, set the region for 3D? how to display? Not at all. As far as I know, r.to.rast3 is for real 3D with volume and all. What you want is sometimes called 2.5D and is simply achieved by: nviz elevation=dem color=landscale_map The nviz screen should pop open and then you should be able to move your 3D display as desired. Regards, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/create-3D-raster-and-display-tp6248005p6248180.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Duplication of lines in output of r.profile.
Dear all, My problem (a very common one) is that I want to digitize a profile and then sample other maps using the extracted coordinates. In order to do so, I tried the following; r.profile -ig input=map output=map_profile With that, I managed to digitize the profile and to get the following file (a piece of it): -8063204.17 4311231.25 0.00 -3769.528809 -8062653.139926 4312065.737586 1000.00 -3768.805176 -8062102.113186 4312900.225172 2000.00 -3768.805176 -8061551.086445 4313734.712758 3000.00 -3767.810791 -8061000.059705 4314569.200344 4000.00 -3764.308105 -8060449.032965 4315403.687930 5000.00 -3764.054199 -8059898.006224 4316238.175517 6000.00 -3763.437500 -8059346.979484 4317072.663103 7000.00 -3760.115723 -8058795.952743 4317907.150689 8000.00 -3759.792236 -8058244.926003 4318741.638275 9000.00 -3758.425537 Which is correct. I have eastings, northings, distance (which increases in steps equal to the resolution of 1000 meters) and then the sampled depth. Ok, but the problem appears when I try to use this profile to sample another map... cat map_profile | r.profile -g input=another_map output=another_map_profile the following happens: -8063204.17 4311231.25 0.00 8 -8062653.139927 4312065.737586 1000.00 8 -8062653.139926 4312065.737586 1000.00 8 -8062102.113186 4312900.225172 2000.00 8 -8061551.086446 4313734.712758 3000.00 8 -8061551.086445 4313734.712758 3000.00 8 -8061000.059705 4314569.200344 4000.00 8 -8060449.032965 4315403.687930 4999.99 8 -8059898.006225 4316238.175516 5999.99 8 -8059898.006224 4316238.175517 6000.00 8 -8059346.979484 4317072.663103 7000.00 8 -8058795.952744 4317907.150689 8000.00 8 -8058795.952743 4317907.150689 8000.00 8 I get many duplicated lines, some of which are not exactly duplicated, but displace the coordinates by a very small distance, affecting also the distance. The 8 in the last column is correct, don't worry. Any ideas about what might be happening? I thank you all very much in advance for any help. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Duplication-of-lines-in-output-of-r-profile-tp6242694p6242694.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Duplication of lines in output of r.profile.
Dear all, I solved it using: d.where map_profile instead of: r.profile -ig input=map output=map_profile The only problem is that I can't see the points while I am digitizing. Also, it demands another line of code to get the actual topographic profile since d.where only gets the coordinates, instead of sampling the raster. Still don't know why the method with r.profile doesn't work right though. If anybody does, I would be glad to hear. Thanks, Marcello. Marcello Gorini wrote: Dear all, My problem (a very common one) is that I want to digitize a profile and then sample other maps using the extracted coordinates. In order to do so, I tried the following; r.profile -ig input=map output=map_profile With that, I managed to digitize the profile and to get the following file (a piece of it): -8063204.17 4311231.25 0.00 -3769.528809 -8062653.139926 4312065.737586 1000.00 -3768.805176 -8062102.113186 4312900.225172 2000.00 -3768.805176 -8061551.086445 4313734.712758 3000.00 -3767.810791 -8061000.059705 4314569.200344 4000.00 -3764.308105 -8060449.032965 4315403.687930 5000.00 -3764.054199 -8059898.006224 4316238.175517 6000.00 -3763.437500 -8059346.979484 4317072.663103 7000.00 -3760.115723 -8058795.952743 4317907.150689 8000.00 -3759.792236 -8058244.926003 4318741.638275 9000.00 -3758.425537 Which is correct. I have eastings, northings, distance (which increases in steps equal to the resolution of 1000 meters) and then the sampled depth. Ok, but the problem appears when I try to use this profile to sample another map... cat map_profile | r.profile -g input=another_map output=another_map_profile the following happens: -8063204.17 4311231.25 0.00 8 -8062653.139927 4312065.737586 1000.00 8 -8062653.139926 4312065.737586 1000.00 8 -8062102.113186 4312900.225172 2000.00 8 -8061551.086446 4313734.712758 3000.00 8 -8061551.086445 4313734.712758 3000.00 8 -8061000.059705 4314569.200344 4000.00 8 -8060449.032965 4315403.687930 4999.99 8 -8059898.006225 4316238.175516 5999.99 8 -8059898.006224 4316238.175517 6000.00 8 -8059346.979484 4317072.663103 7000.00 8 -8058795.952744 4317907.150689 8000.00 8 -8058795.952743 4317907.150689 8000.00 8 I get many duplicated lines, some of which are not exactly duplicated, but displace the coordinates by a very small distance, affecting also the distance. The 8 in the last column is correct, don't worry. Any ideas about what might be happening? I thank you all very much in advance for any help. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Duplication-of-lines-in-output-of-r-profile-tp6242694p6244412.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Region definition
Luisa Peña wrote: Greetings I have a raster map with a size like 25000 x 3 with valid values on all its extent. With another raster, I defined a sub-extent of this raster, much smaller where only a small area is valid and the rest it NULL() like this: r.mapcalc output = if(regional_area@PERMANENTgt;0,2004@Reg,null()) In this case, regional_area is a smaller area and I want to select only a portion of 2004@Reg that falls inside regional_area. So I obtained output as a raster map with only some values (4000x3000) If I define g.region rast=output I still obtain a 25000 x3 region which does not make sense since I only have a small valid area. How can I define a region, using g.region for only output valid pixels? Thanks Luisa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user g.region zoom=output ? -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Region-definition-tp6207972p6210464.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Creating raster of geographic coordinates
Nepomuk Reinhard wrote: Dear all, I'm a newbie in grass GIS so I'm sorry, if this question is very simple. Has anyone any idea how to create a raster map including only the information of the latitude and longitude of each cell? I want to write a script to compute the solar elevation angle for a large area and time range and it would be easier with this map. Can anyone help me? Thank you very much Hey, You can assess the internal variables which r.mapcalc work with by some specific commands. x() and y() retrieve the coordinate information. So, after definining your region of calculation with g.region, you can then do: r.mapcalc long=x() r.mapcalc lat=y() In this way, you will have two rasters, each of which contains one dimension of your coordinates. Then you can do calculations with them as you like. Is it what you wanted? Hope it helps. Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Creating-raster-of-geographic-coordinates-tp6080460p6085591.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Calculate averagfe of raster maps without mapcalc
Kim: I need to calculate the average of a set of raster images. How can I calculate it without using mapcalc? THanks Hello Kim, You can use the module r.series. Like this, if you have few images: r.series input=image1,image2,image3... method=average output=averaged_image Or if you have a bunch of images with similar names, you can do: r.series input=`g.mlist pattern=the_pattern_within_the_ names sep=,` method=average output=averaged_image Hope this helps. Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Calculate-averagfe-of-raster-maps-without-mapcalc-tp6031736p6032330.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Eliminating values based on a null
Jenny: in my base map (called X) I have a few null values and, in Y map I want to eliminate pixels that match with null values in X. How can I do this? besides using mapcalc Hello Jenny, I don't know if it is a coincidence, but your problem can be solved in the same way as Kim's problem. You can use the module r.series with the -n flag. It will propagate the nulls among your input rasters. The method you use does not matter because the -n flag overrides it. So it would be like this: r.series -n input=X,Y output=Y_without_X_nulls method=average (or any method) Hope this helps, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Eliminating-values-based-on-a-null-tp6031771p6032382.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: v.kernel -- how to get useful results
Aren Cambre wrote: I am not getting any responses. :-) Am I doing something really dumb? Is this the right forum for this kind of question? Thanks, Aren On Sun, Feb 13, 2011 at 8:02 AM, Aren Cambre a...@arencambre.com wrote: Maybe I could clarify. Here's the command: *v.kernel --verbose input=master_grass7 output=master_grass7a_heatmap stddeviation=.0001* Here's the command output: *STDDEV: 0.000100* *RES: 200.00 ROWS: 1000 COLS: 1000* * * *Writing output raster map using smooth parameter=0.000100.* * * *Normalising factor=0.00.* *Maximum value in output: 0.00e+000.* If I change stddeviation to *100*, here's what I get: *STDDEV: 100.00* *RES: 200.00 ROWS: 1000 COLS: 1000* * * *Writing output raster map using smooth parameter=100.00.* * * *Normalising factor=64826.350188.* *Maximum value in output: 0.00e+000.* Either way, the resulting raster is a large salmon/pink square. I have no idea what I'm doing wrong. I've tried varying the *stddeviation *parameter from 100 to .0001 and some values in between, and I don't get anything different. Heck, I just now used 100 and .01 and got nothing different. I was really hoping to make a high res heat map of these 2.5 million points and overlay on to a street map layer. Aren On Fri, Feb 11, 2011 at 9:45 PM, Aren Cambre a...@arencambre.com wrote: I am not clear how to get useful results out of v.kernel. I have a vector layer imported from PostGIS that has about 2.5 million points. I want to make a high density raster to show where these points are clustered. I can get the vector layer to display in GRASS just fine, albeit without attributes because of http://trac.osgeo.org/grass/ticket/1274. It's not clear to me, based on http://grass.fbk.eu/gdp/html_grass64/v.kernel.html, how you can get it to do something besides make a big, pinkish (salmon-red?) square? Aren ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user Hey, I had tried playing around with v.random and v.kernel to see if I could understand your problem, but I couldn't find any solutions so I didn't post it. But since you got upset with GRASS community, I will share what I found out anyway :) I tried with different numbers of points and with different resolutions and I was amazed that you could make v.kernel work with 2.5 million points in a 200 meter resolution with a 100 stdeviation!! My quadcore computer took so much that I gave up. I noticed that it goes slower with increasing resolution, increasing number of points and increasing stdev. I also noticed that you have to set a much higher stdev for smaller resolutions and that this value is by no means intuitive. For instance: for my 2.5 meter resolution, I got meaningful results for 1,000 points using a stdev of 30. However, this same 30 stdev in my 1,000 resolution region gives me the salmon/pink square. So, in this case, a 10,000 stdev begins to give me good results. So, my humble opinion is that you should try stdevs greater than 100, but still much smaller than 1,000,000. I believe that it is just a matter of tuning these parameters with respect to your resolution and number of points. Hope this helps (or at least, keep you in the list :) ) Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/v-kernel-how-to-get-useful-results-tp6018010p6027287.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: v.kernel -- how to get useful results
Aren said: Where is resolution adjusted? http://grass.fbk.eu/gdp/html_grass64/v.kernel.html doesn't make that clear. GRASS works with the region concept. You can adjust any region settings with the command g.region, like: g.region res=desired_resolution -p The -p is for you to see the resulting changes. Am I supposed to have a pre-made raster layer already that corresponds to my vector layer? No, you probably don't. I would suggest you play around with v.random to create some random points and then use v.kernel to make the heat map. Do that with different number points, stdev and resolutions to get the feel of it. Maybe in this way you will understand what is going on with your specific case. I really appreciate your advice! Any time! Sorry not to help you more. I'm not upset with the list, was just afraid this was too esoteric or poorly stated. I think I myself have been a little upset a few times when I did not get any responses to my querries :) that's why I mentioned, I guess. But I from Brazil, so either I get upset or I get really happy :) Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/v-kernel-how-to-get-useful-results-tp6018010p6028684.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: r.param.scale curvatures: are really OK
Hello, I cannot really answer your question, but I have been working with a combination of your fuzzy modules for GRASS and r.param.scale in order to accomplish a fuzzified version of Wood's morphometric feature extraction method. In doing so, I noticed that the results of r.param.scale param=feature differ very much from the results of this same module in Wood's original software Landserf, by using the same slope and curvature thresholds. Do you think this can be an associated issue to what you mentioned? All I can say is that the formula you described (the one used in GRASS) is exactly the same that is in Wood's Ph.D. thesis, which in turn is based in Evans (1979) work, as you probably already know. By the way, great fuzzy modules! Best regards, Marcello. Jarek Jasiewicz wrote: Hi while I modified r.param.scale for my purposes I noticed that some formulas for curvatures differs from that I know: for example: plan curvature: is (2.0 * (b * d * d + a * e * e - c * d * e) / pow(e * e + d * d, 1.5)); probably shall be: ( (b * d * d + a * e * e - 2.0 *(c * d * e)) / pow(e * e + d * d, 1.5)); profile curvature: is return (-2.0 * (a * d * d + b * e * e + c * e * d) / ((e * e + d * d) * pow(1.0 + d * d + e * e, 1.5))); probably shall be: return (- (a * d * d + b * e * e + 2.0* (c * e * d)) / ((e * e + d * d) * pow(1.0 + d * d + e * e, 1.5))); Of course threre could be reasons why little different formulas are used but I do not see any. This formulas is in grass 6.4, 6.5 and 7.0 and I assume in older version too. regards Jarek ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/r-param-scale-curvatures-are-really-OK-tp5696388p5698886.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: reclassify raster based on distribution
Timmie says: An assiciated question: How do I get a diagram of the frequency distribution of the floating point values of a raster? I tried histogram but I cannot get the label on the x and y axis. Something like a plot of the r.report output. Hello Timmie, Not really an answer, but maybe some ideas. GRASS does not seem to be really powerful with respect to statistical plots, so what you could do is to use a combination of GRASS+Shell+Python, more specifically the library Matplotlib of Python. I tried R for a while, but since I am not very good at scripting, Matplotlib turned out to be much more user-friendly. You can parse the output of GRASS modules using unix commands and send them to a python script that uses Matplotlib. You can see below an example of the kind of plots I've been doing in this way. http://osgeo-org.1803224.n2.nabble.com/file/n5680166/sample_feature_signature.png The best way to get going I would say is to look at their examples gallery http://matplotlib.sourceforge.net/gallery.html , then find the example that better fits your needs and modify the code. Hope it helped a bit. Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/reclassify-raster-based-on-distribution-tp5679127p5680166.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: A Script that only selects raster inside a polygon
Pedro Roma: I want to develop a script that crops a raster in order to only have the pixels that are located inside a vector polygon. There is probably a more elegant solution, but this will do: g.region vect=your_vector v.to.rast input=your_vector output=your_vector_rasterized use=val r.mask input=your_vector_rasterized r.mapcalc clipped_raster=original_raster r.mask -r Hope this helps, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/A-Script-that-only-selects-raster-inside-a-polygon-tp5567368p5567467.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: A Script that only selects raster inside a polygon
Pedro Roma: I want to develop a script that crops a raster in order to only have the pixels that are located inside a vector polygon. Marcello Gorini: There is probably a more elegant solution, but this will do: g.region vect=your_vector v.to.rast input=your_vector output=your_vector_rasterized use=val Nikos: (comment of minor importance I guess... the above needs value= to be fed with a value of course). r.mask input=your_vector_rasterized r.mapcalc clipped_raster=original_raster r.mask -r Marcello, honestly, it's very nice to see how you stepped up from 0 to 100 within almost zero time :-) (...watch out for curves and steep slopes :-p) Thanks a lot for your comments Nikos! I am just trying to make up for lost time due to my Windows point-and-click past life :-) Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/A-Script-that-only-selects-raster-inside-a-polygon-tp5567368p5568572.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Feature extraction in GRASS and Landserf.
On Mon, Aug 16, 2010 at 10:20 PM, Marcello Gorini gor...@gmail.com wrote: Dear all, By comparing morphometric feature maps obtained from both r.param.scale in GRASS and the function sufparam using LandScript in Landserf (Wood, 1996-2009), I noticed great discrepancies. Actually, a morphometric feature map derived in GRASS using slope tolerance of 3 and curvature tolerance of 0.03 is similar (visually) to a map derived in Landserf using 3 for slope and 0.05 for curvature. Markus: Please generate a difference map (color table differences) and put a screenshot online somewhere. Perhaps also drawn over the shaded DEM (r.shaded.relief) with d.his (h=differences i=shaded_terrain). Markus Dear Markus, Sorry for my very late response, I was REALLY far away from the computer. I attached the feature maps both from GRASS (the top one) and Landserf (the bottom one). The DEM is a huge seamount and its surroundings, obtained from the GEBCO grid (1000 meters grid size). As you can see, the discrepancies I mentioned are so great that I believe no differences maps are needed (I think you will agree with me, but if not I could gladly send you the dif map). Both maps use slope tolerance of 3 and curvature tolerance of 0.03. In order to make these maps look the same, I had to use curvature tolerance of 0.11 in Landserf, leaving the same slope value. I know the slope value is in degrees both in GRASS and Landserf and I know the curvature value in Landserf is dimensionless, but I don't know the unit of curvature in GRASS. I believe that both GRASS and Landserf use the same Wood's algorithm, so there should not be any differences, right? Or are there any modifications in the GRASS version? With respect to units, maybe? I thank you very much for any help. Marcello. http://osgeo-org.1803224.n2.nabble.com/file/n5460832/GRASS_features.png http://osgeo-org.1803224.n2.nabble.com/file/n5460832/LANDSERF_features.png -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Feature-extraction-in-GRASS-and-Landserf-tp5429470p5460832.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Installing r.area
Hello Daniel,
I also wanted to use r.area, so I installed it but had an error, as posted
here
http://osgeo-org.1803224.n2.nabble.com/New-modules-in-svn-add-on-r-area-and-r-convergence-td5161926.html#a5199839
Then afterwards Milton Ribeiro sent me another way to get the same results
in a rather fast way.
I don't want to interrupt your struggle to get r.area working, but if you
need some fast results, I believe you could try this alternative:
r.stats -na input=clumped_map | awk '{print $1,=,int($2/1)+1}' |
r.reclass input=clumped_map output=clumped_map_AreaHA - --o
The area is calculated in squared meters than converted to hectares by awk
(but you can probably change units within r.stats) than sent to r.reclass.
Hope this helps in anyway.
Cheers,
Marcello.
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[GRASS-user] Re: how to get raster region corresponding to vector polygon region?
Kwas wrote: Hello, I have a raster map (dem) and I want to select a region of the raster corresponding to a polygon that is in a vector map.nbsp; What is the best way to do this?nbsp; It looks like r.in.poly might be along the lines of what I need but in that case I think I would need to generate the ascii poly file first but I'm wondering if there is a better way?nbsp; Seems like there should be a single command to do this. My vector map has 45 polygons with cat values 1..45,nbsp; so I would like to get a section from my raster map corresponding to one of the polygons specified by cat value. appreciate any help! thanks, ken ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user Hello Ken, I am also new to GRASS, but I have been doing what you want quite a lot these days. There is probably a better way to do that (and I would like to hear it very much, specially if there is a single command to do this), but for now, I think the code below does the job: g.region vect=your_vector v.extract input=your_vector output=selected_polygon type=area where=cat=desired_cat v.to.rast input=selected_polygon output=polygon_rasterized use=val type=area r.mask input=polygon_rasterized Now, any processing that you do will be applied only in the region corresponding to the selected polygon. If you want to create a raster corresponding to the selected polygon, just do: r.mapcalc new_raster=any_old_raster To take out the mask, just type: r.mask -r Hope this helps, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/how-to-get-raster-region-corresponding-to-vector-polygon-region-tp5192862p5193386.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Select random cells from map
António Rocha: Hi there I need to randomly select non-null cells from a given map. I tried r.random.cells but I cannot define a maximum number random cells and some selected random cells are not valid values in my map. is there any other function to randomly select cells from a raster? Hello Antônio, This one I think I can help. There is this command v.random that allows you to create a vector containing random points in your current region. And you can control the number of points with the parameter n. Than you can upload the vector database with values from any raster with the command v.what.rast and than export it to a file if you want. The manual has this clarifying example: v.random output=random_samples n=20 v.db.addtable map=random_samples layer=1 columns='cat INTEGER, sample DOUBLE PRECISION' v.what.rast vector=random_samples raster=elevation@permanent layer=1 column=sample However, I believe that if you have null cells in your raster and some of the random points happen to fall over them, you will have less valid points than you expect, so I would say that you should check the resultant database. Hope this helps. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Select-random-cells-from-map-tp5125298p5125703.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
On Mon, May 31, 2010 at 12:11 AM, Marcello Gorini gor...@gmail.com wrote: OK, right after a wrote that, I thought I was being too bold. Should I go for: svn checkout https://svn.osgeo.org/grass/grass/branches/releasebranch_6_4 grass64_release Markus: Yes. Subsequently, it is sufficient to run cd grass64_release svn update No need to checkout again and again since update will download the changes. Good, thanks for the tip. Great that I am already in the new version. Everything is going to be easier now. Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5121589.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: Trying python scripts.
On Mon, May 31, 2010 at 5:39 AM, Daniel Lee lee.daniel.1...@googlemail.com wrote: Hi Marcello, Great that everything's working for you ;) I'm also a beginner and loving GRASS and Linux... Anyway, 'nuff said. To Python: Your script worked in the new version? That means in the new 6-4? Hello Daniel, how are you? Yes, I mean https://svn.osgeo.org/grass/grass/branches/releasebranch_6_4 . I've also tried running Python scripts and have had problems, I ended up switching over to shell scripts because my work was very time sensitive, but I really like working with Python and I know it better than shell scripting. I noticed in your post earlier that you used the command: *python myscript.py raster1=map1 raster2=map2 output=outmap* Following questions: - Is it necessary to input python in front of the script name? No, you can use ./ only. - I was under the impression that Python scripts can be saved into the script directory (*/opt/grass/scripts*, if I'm not mistaken, right now I'm on another computer so I can't check); is that necessary? If not, do you just enter the entire path to the script? Yes, you can also save it in the scripts directory and run it directly or you can enter the entire path in terminal and ./script. - I was also under the impression, that since you tell GRASS what kind of a script it is in the first line (*#!/usr/bin/env python*), that you don't need to save it as .py. Am I mistaken there? You are also right. I renamed it without the .py extension and it worked as well. I've always saved my python scripts into the script directory and then tried to run them from the GRASS wxPython GUI. It always seemed to find the script and then fail to parse it correctly. Perhaps it was because I was leaving off the python at the beginning of the command line; everything else should be the same, the script was executable, etc. Any other thoughts? I sadly can't give any examples at the moment because I'm on another computer and after my new nstallation I don't have the failed script outputs as examples any more. I saved it as r.myscript in the script directory and was able to run directly from the gui or the terminal with no problems. So I guess it is not because of the python in the command line. If your version is the same as mine now, I would check the code itself. But I am really a beginner in everything so I wouldn't listen to me very much. At least, I think I showed you that you are right in everything. If you can post some examples of your failed scripts later on, I (and everybody else) could try them for you. It would be good for my learning as well. Thanks! Daniel No, I thank you, since you are the first person I might be helping a little little bit in this list. It is good to at least try to contribute. Best regards, Marcello. 2010/5/31 Marcello Gorini gor...@gmail.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Nikos Alexandris wrote: Marcello Gorini: ... I am a total beginner in python and GRASS (and any other programming language), so I am trying to run the first examples found in http://grass.osgeo.org/wiki/GRASS_and_Python. Marcello, just fyi: I've added another simple example script in http://grass.osgeo.org/wiki/GRASS_and_Python. Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user Thanks Nikos, it worked fine for me. The grass.mapcalc code is the only one that is giving me trouble though. I guess I will have to stick with shell scripts for now. But won´t give up python, of course. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5118744.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Martin Landa wrote: Hi, 2010/5/30 Marcello Gorini gor...@gmail.com: I am a total beginner in python and GRASS (and any other programming language), so I am trying to run the first examples found in http://grass.osgeo.org/wiki/GRASS_and_Python. GRASS 6.4.0RC5 is quite old. Try RC6 or better download code from SVN http://trac.osgeo.org/grass/wiki/DownloadSource#GRASS6.4 Martin -- Martin Landa landa.martin gmail.com * http://gama.fsv.cvut.cz/~landa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user Hello Martin, Yes, I think I need to move on and download a newer version. I will probably try to install GRASS 7. Thanks for the suggestion. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5119718.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
OK, right after a wrote that, I thought I was being too bold. Should I go for: svn checkout https://svn.osgeo.org/grass/grass/branches/releasebranch_6_4 grass64_release or this one? svn checkout https://svn.osgeo.org/grass/grass/tags/release_20090609_grass_6_4_0RC5 grass640_rc5 Thanks again and sorry for all the questions. Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5119849.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
On Monday 31 of May 2010 00:11:00 Marcello Gorini wrote: Should I go for: svn checkout https://svn.osgeo.org/grass/grass/branches/releasebranch_6_4 grass64_release or this one? svn checkout https://svn.osgeo.org/grass/grass/tags/release_20090609_grass_6_4_0RC5 grass640_rc5 Nikos wrote: Not sure about the extent of the differences. Go for the releasebranch, should be the latest if I am not wrong. FYI, there is also http://grass.osgeo.org/wiki/Compile_and_Install_Ubuntu which might not be 100% up-to-date but should do it. Sorry, I just saw your e-mail. I guess it might answer some of my questions. I am going into http://grass.osgeo.org/wiki/Compile_and_Install_Ubuntu right now. Thank you Nikos. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5120112.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
hamish-2 wrote: Marcello wrote: checking for lex... no configure: error: *** Unable to locate lex. ... P.S. I use Ubuntu 9.10 64 bits. you need to install all the Build-depends packages listed here: http://svn.debian.org/viewsvn/pkg-grass/packages/grass/trunk/debian/control ( http://grass.osgeo.org/wiki/Compile_and_Install_Ubuntu#Dependencies ) Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user YES!!! Everything working with all the fuzzy modules already !! I went through the steps in http://grass.osgeo.org/wiki/Compile_and_Install_Ubunt, read the INSTALL file and used Stephen's script and everything went OK! Great! Thank you everyone!! Really! Now I am fully enjoying and understanding what the FOSS community is, and especially the GRASS community. I really hope one day I will know enough to be able to contribute as well. Thank you Nikos, Carlos, Martin, Hamish, thank you Stephen for your script that is a piece of art!! Sorry for the small talk...but THANK YOU! Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5120201.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Marcello Gorini wrote: hamish-2 wrote: Marcello wrote: checking for lex... no configure: error: *** Unable to locate lex. ... P.S. I use Ubuntu 9.10 64 bits. you need to install all the Build-depends packages listed here: http://svn.debian.org/viewsvn/pkg-grass/packages/grass/trunk/debian/control ( http://grass.osgeo.org/wiki/Compile_and_Install_Ubuntu#Dependencies ) Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user YES!!! Everything working with all the fuzzy modules already !! I went through the steps in http://grass.osgeo.org/wiki/Compile_and_Install_Ubunt, read the INSTALL file and used Stephen's script and everything went OK! Great! Thank you everyone!! Really! Now I am fully enjoying and understanding what the FOSS community is, and especially the GRASS community. I really hope one day I will know enough to be able to contribute as well. Thank you Nikos, Carlos, Martin, Hamish, thank you Stephen for your script that is a piece of art!! Sorry for the small talk...but THANK YOU! Cheers, Marcello. And guess what?! The python script works perfectly in this new version! So I guess we can finally get out of this topic, huh? :) Or change it for RUNNING python scripts. I am really happy! Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5120222.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Nikos Alexandris wrote: Marcello Gorini wrote: Thanks for the try. I tested it again with other rasters, but I got the same error. Could it possibly be something related to the 64bits architecture? I don't think so. I work with Kubuntu Lucid 64 bit :-) Or could GRASS be sending the outcome somewhere else? Negative. You are running the script from within a grass-session (as you wrote in the first post). Let's try to take this step by step. What is the result of each of the following commands: ls -l myscript.py g.gisenv g.region -p r.info map1 r.info map2 Well, I guess that eventually I will go around this problem or even bump into the solution, but the most important thing to say is that I appreciated the effort and that it was a very good reception to this list. Bah... it was only me trying to not forget the basics with python scripts. You will get better and more precise replies from other advanced users and developers. Thank you very much Nikos. And thank you also for the explanations with respect to the right way to answer posts. I will do my best to make my posts as clean and explanatory as possible. You are warned, you might get yourself into trouble ;-p Cheers, Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user OK, thank you, so let's go step by step: ls -l myscript.py result: -rwxr-xr-x 1 marcello marcello 1227 2010-05-28 08:13 myscript.py g.gisenv result: GISDBASE=/home/marcello/grassdata LOCATION_NAME=Ocean_floor MAPSET=level4 MONITOR=x0 GRASS_GUI=tcltk g.region -p result: projection: 99 (Mercator) zone: 0 datum: wgs84 ellipsoid: wgs84 north: 3947900 south: 3633400 west: -7366700 east: -7022600 nsres: 3700 ewres: 3700 rows: 85 cols: 93 cells: 7905 r.info map1 result: ++ | Layer:map1 Date: Thu May 27 18:48:30 2010 | | Mapset: level4 Login of Creator: marcello | | Location: Ocean_floor | | DataBase: /home/marcello/grassdata | | Title: ( topmod ) | | Timestamp: none | || | | | Type of Map: raster Number of Categories: 255 | | Data Type:FCELL | | Rows: 1177 | | Columns: 1388 | | Total Cells: 1633676 | |Projection: Mercator | |N:6358450S:2003550 Res: 3700 | |E: -3920150W: -9055750 Res: 3700 | | Range of data:min = 0.00 max = 1.00 | | | | Data Description: | |generated by r.mapcalc | | | | Comments: | |if(topmod 0, 0, -topmod) | | | ++ r.info map2 result: ++ | Layer:map2 Date: Thu May 27 18:49:29 2010 | | Mapset: level4 Login of Creator: marcello | | Location: Ocean_floor | | DataBase: /home/marcello/grassdata | | Title: ( topmod2 ) | | Timestamp: none | || | | | Type of Map: raster Number of Categories: 255 | | Data Type:FCELL | | Rows: 1177
[GRASS-user] Re: Trying python scripts.
Nikos Alexandris wrote: Marcello Gorini: ...let's go step by step: ls -l myscript.py -rwxr-xr-x 1 marcello marcello 1227 2010-05-28 08:13 myscript.py looks fine g.gisenv GISDBASE=/home/marcello/grassdata LOCATION_NAME=Ocean_floor MAPSET=level4 MONITOR=x0 GRASS_GUI=tcltk just out of curiosity (and not that, I think, it makes any differene): are you running (grass and) the script via the gui's command line or in text-mode? g.region -p projection: 99 (Mercator) zone: 0 datum: wgs84 ellipsoid: wgs84 north: 3947900 south: 3633400 west: -7366700 east: -7022600 nsres: 3700 ewres: 3700 rows: 85 cols: 93 cells: 7905 looks ok (below also) r.info map1 ... | Range of data:min = 0.00 max = 1.00 ... r.info map2 ... | Range of data:min = 1000.00 max = 1000.00 ... Result of r.info outmap: ERROR: Raster map outmap not found Hmmm... I don't know what could be wrong here. I guess running directly in- grass what the python script is expected to do ( r.mapcalc outmap = map1 + map2 ) is ok, isn't it? Could you also please copy-paste the exact (python) command you use within the grass-session to get the desired outmap? Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user Ok, so answering your questions: just out of curiosity (and not that, I think, it makes any differene): are you running (grass and) the script via the gui's command line or in text-mode? No gui, everything using the terminal. Hmmm... I don't know what could be wrong here. I guess running directly in- grass what the python script is expected to do ( r.mapcalc outmap = map1 + map2 ) is ok, isn't it? Yep! Could you also please copy-paste the exact (python) command you use within the grass-session to get the desired outmap? Sure: python myscript.py raster1=map1 raster2=map2 output=outmap Well, I think that eventually we will find out that the problem lies between my chair and my computer, and you are going to be mad with me :) But for now, let's keep going. Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5113299.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Carlos Grohmann-2 wrote: Hello Marcello. It's good to _finally_ see you here :) I tried your script and it worked for me, but I had to change the last line from sys.exit(main()) to: main() could you try that? best Carlos On Fri, May 28, 2010 at 08:23, Marcello Gorini gor...@gmail.com wrote: Nikos Alexandris wrote: Marcello Gorini wrote: Thanks for the try. I tested it again with other rasters, but I got the same error. Could it possibly be something related to the 64bits architecture? I don't think so. I work with Kubuntu Lucid 64 bit :-) Or could GRASS be sending the outcome somewhere else? Negative. You are running the script from within a grass-session (as you wrote in the first post). Let's try to take this step by step. What is the result of each of the following commands: ls -l myscript.py g.gisenv g.region -p r.info map1 r.info map2 Well, I guess that eventually I will go around this problem or even bump into the solution, but the most important thing to say is that I appreciated the effort and that it was a very good reception to this list. Bah... it was only me trying to not forget the basics with python scripts. You will get better and more precise replies from other advanced users and developers. Thank you very much Nikos. And thank you also for the explanations with respect to the right way to answer posts. I will do my best to make my posts as clean and explanatory as possible. You are warned, you might get yourself into trouble ;-p Cheers, Nikos ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user OK, thank you, so let's go step by step: ls -l myscript.py result: -rwxr-xr-x 1 marcello marcello 1227 2010-05-28 08:13 myscript.py g.gisenv result: GISDBASE=/home/marcello/grassdata LOCATION_NAME=Ocean_floor MAPSET=level4 MONITOR=x0 GRASS_GUI=tcltk g.region -p result: projection: 99 (Mercator) zone: 0 datum: wgs84 ellipsoid: wgs84 north: 3947900 south: 3633400 west: -7366700 east: -7022600 nsres: 3700 ewres: 3700 rows: 85 cols: 93 cells: 7905 r.info map1 result: ++ | Layer: map1 Date: Thu May 27 18:48:30 2010 | | Mapset: level4 Login of Creator: marcello | | Location: Ocean_floor | | DataBase: /home/marcello/grassdata | | Title: ( topmod ) | | Timestamp: none | || | | | Type of Map: raster Number of Categories: 255 | | Data Type: FCELL | | Rows: 1177 | | Columns: 1388 | | Total Cells: 1633676 | | Projection: Mercator | | N: 6358450 S: 2003550 Res: 3700 | | E: -3920150 W: -9055750 Res: 3700 | | Range of data: min = 0.00 max = 1.00 | | | | Data Description: | | generated by r.mapcalc | | | | Comments: | | if(topmod 0, 0, -topmod) | | | ++ r.info map2 result: ++ | Layer: map2 Date: Thu May 27 18:49:29 2010 | | Mapset: level4 Login of Creator: marcello | | Location: Ocean_floor | | DataBase: /home/marcello/grassdata | | Title: ( topmod2 ) | | Timestamp: none | || | | | Type of Map: raster Number of Categories: 255 | | Data Type: FCELL | | Rows: 1177 | | Columns: 1388 | | Total Cells: 1633676 | | Projection: Mercator | | N: 6358450 S: 2003550 Res: 3700 | | E: -3920150 W: -9055750 Res: 3700 | | Range of data: min = 1000.00 max = 1000.00 | | | | Data Description: | | generated by r.mapcalc | | | | Comments: | | if(topmod -2, 1000, topmod) | | | ++ Now just to emphasize :) Result of r.info outmap: ERROR: Raster map outmap not found Can you make anything out of it? Best regards, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5112658.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- Prof. Carlos Henrique Grohmann - Geologist
[GRASS-user] Re: Trying python scripts.
Nikos: Just stick on Marcello. Get yourself the GRASS-book, look at the GRASS-wiki, invest some time generally and specifically, and you will be addicted ;-) It is worthwhile. I will, don't worry. And I already bought the GRASS book. That is what really got me going (after Carlos got me interested in the first place). I must say that it is the best technical book I have ever bought. Almost everything I needed to achieve my firsts goals with GRASS, I found in the book only by turning the page. It seems strange though. We might need the guru's to solve this... (?). This one is probably a subliminal message somewhere in the book. I need to look closer :) Cheers, Marcello. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5113440.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Trying python scripts.
Dear all, This is kind of my first e-mail ever to ANY mailing list, so please forgive me if I don't express myself in the best way. I will improve eventually. I am a total beginner in python and GRASS (and any other programming language), so I am trying to run the first examples found in http://grass.osgeo.org/wiki/GRASS_and_Python. I managed to run the shaded_relief one OK, but the one with respect to mapcalc, I couldn't. I copied a script found in http://www.mail-archive.com/grass-...@lists.osgeo.org/msg14669.html (transcribed below) and tried to run it: #!/usr/bin/env python # g.parser demo script for python programing #%module #% description: g.parser test script (python) TUN #%end #%flag #% key: f #% description: A flag #%end #%flag #% key: n #% description: Another flag #%end #%option #% key: raster1 #% type: string #% gisprompt: old,cell,raster #% description: Raster input map #% required : yes #%end #%option #% key: raster2 #% type: string #% gisprompt: old,cell,raster #% description: Raster2 input map #% required : yes #%end #%option #% key: output #% type: string #% gisprompt: new,cell,raster #% description: Output #% required : yes #%end import os import sys import grass.script as grass def main(): output = options['output'] raster1 = options['raster1'] raster2 = options['raster2'] grass.mapcalc($out = $rast1 + $rast2, out = output, rast1 = raster1, rast2 = raster2) if flags['f']: print Flag -f set else: print Flag -f not set if flags['n']: print Flag -n foi definida mas nao devia else: print Flag -n not set- GOOD print options print flags return 0 if __name__ == __main__: options, flags = grass.parser() sys.exit(main()) It seems to run OK and “100%” is displayed in the GRASS prompt, but when I tried to display the map, I found out that it wasn't created at all. Just for you to know, to run the script I simply create it (say “myscript.py”), give permissions and run it in a GRASS session with the necessary options: ./myscript.py output=outmap raster1=map1 raster2=map2 I am using Ubuntu 9.04 64bits and GRASS 6.4.ORC5. Can anyone help me? Best regards, Marcello Gorini. -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5109105.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Hello Nikos, Marcello Gorini. Nikos Alexandris wrote: Hi Marcello, Marcello Gorini: This is kind of my first e-mail ever to ANY mailing list, so please forgive me if I don't express myself in the best way. I will improve eventually. I am a total beginner in python and GRASS (and any other programming language), so I am trying to run the first examples found in http://grass.osgeo.org/wiki/GRASS_and_Python. I managed to run the shaded_relief one OK, but the one with respect to mapcalc, I couldn't. I copied a script found in http://www.mail-archive.com/grass-...@lists.osgeo.org/msg14669.html (transcribed below) and tried to run it: #!/usr/bin/env python # g.parser demo script for python programing #%module #% description: g.parser test script (python) TUN #%end #%flag #% key: f #% description: A flag #%end #%flag #% key: n #% description: Another flag #%end #%option #% key: raster1 #% type: string #% gisprompt: old,cell,raster #% description: Raster input map #% required : yes #%end #%option #% key: raster2 #% type: string #% gisprompt: old,cell,raster #% description: Raster2 input map #% required : yes #%end #%option #% key: output #% type: string #% gisprompt: new,cell,raster #% description: Output #% required : yes #%end import os import sys import grass.script as grass def main(): output = options['output'] raster1 = options['raster1'] raster2 = options['raster2'] grass.mapcalc($out = $rast1 + $rast2, out = output, rast1 = raster1, rast2 = raster2) if flags['f']: print Flag -f set else: print Flag -f not set if flags['n']: print Flag -n foi definida mas nao devia else: print Flag -n not set- GOOD print options print flags return 0 if __name__ == __main__: options, flags = grass.parser() sys.exit(main()) It seems to run OK and “100%” is displayed in the GRASS prompt, but when I tried to display the map, I found out that it wasn't created at all. If there are no errors and the script ran fine, maybe you just need to check the region settings? Just for you to know, to run the script I simply create it (say “myscript.py”), give permissions and run it in a GRASS session with the necessary options: ./myscript.py output=outmap raster1=map1 raster2=map2 I am using Ubuntu 9.04 64bits and GRASS 6.4.ORC5. For example: # check region extent, etc. g.region -p # set region extent and resolution to the map of your interest g.region rast=outmap -pa # give color r.colors rast=outmap color=rainbow # try to display d.mon x0 d.rast outmap # is it there? Regards, Nikos No, it is not there. To make sure I set the region to the input map: g.region rast=map1 -pa d.mon x0 d.rast map1 OK, it is there. Then I ran the script: ./myscript.py output=outmap raster1=map1 raster2=map2 After processing, I tried: d.rast outmap But then: ERROR: Raster map outmap not found What could be wrong? Best regards, Marcello. P.S.: By the way, is this the right way to quote answers? ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5109431.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Oops, I guess I quoted the text in the wrong way. Sorry for that. Marcello Gorini wrote: Hello Nikos, Marcello Gorini. Nikos Alexandris wrote: Hi Marcello, Marcello Gorini: This is kind of my first e-mail ever to ANY mailing list, so please forgive me if I don't express myself in the best way. I will improve eventually. I am a total beginner in python and GRASS (and any other programming language), so I am trying to run the first examples found in http://grass.osgeo.org/wiki/GRASS_and_Python. I managed to run the shaded_relief one OK, but the one with respect to mapcalc, I couldn't. I copied a script found in http://www.mail-archive.com/grass-...@lists.osgeo.org/msg14669.html (transcribed below) and tried to run it: #!/usr/bin/env python # g.parser demo script for python programing #%module #% description: g.parser test script (python) TUN #%end #%flag #% key: f #% description: A flag #%end #%flag #% key: n #% description: Another flag #%end #%option #% key: raster1 #% type: string #% gisprompt: old,cell,raster #% description: Raster input map #% required : yes #%end #%option #% key: raster2 #% type: string #% gisprompt: old,cell,raster #% description: Raster2 input map #% required : yes #%end #%option #% key: output #% type: string #% gisprompt: new,cell,raster #% description: Output #% required : yes #%end import os import sys import grass.script as grass def main(): output = options['output'] raster1 = options['raster1'] raster2 = options['raster2'] grass.mapcalc($out = $rast1 + $rast2, out = output, rast1 = raster1, rast2 = raster2) if flags['f']: print Flag -f set else: print Flag -f not set if flags['n']: print Flag -n foi definida mas nao devia else: print Flag -n not set- GOOD print options print flags return 0 if __name__ == __main__: options, flags = grass.parser() sys.exit(main()) It seems to run OK and “100%” is displayed in the GRASS prompt, but when I tried to display the map, I found out that it wasn't created at all. If there are no errors and the script ran fine, maybe you just need to check the region settings? Just for you to know, to run the script I simply create it (say “myscript.py”), give permissions and run it in a GRASS session with the necessary options: ./myscript.py output=outmap raster1=map1 raster2=map2 I am using Ubuntu 9.04 64bits and GRASS 6.4.ORC5. For example: # check region extent, etc. g.region -p # set region extent and resolution to the map of your interest g.region rast=outmap -pa # give color r.colors rast=outmap color=rainbow # try to display d.mon x0 d.rast outmap # is it there? Regards, Nikos No, it is not there. To make sure I set the region to the input map: g.region rast=map1 -pa d.mon x0 d.rast map1 OK, it is there. Then I ran the script: ./myscript.py output=outmap raster1=map1 raster2=map2 After processing, I tried: d.rast outmap But then: ERROR: Raster map outmap not found What could be wrong? Best regards, Marcello. P.S.: By the way, is this the right way to quote answers? ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5109444.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Trying python scripts.
Marcello Gorini wrote: [...] ... I am trying to run the first examples found in http://grass.osgeo.org/wiki/GRASS_and_Python. --%--- a script was here - look first post ! ---%-- It seems to run OK and “100%” is displayed in the GRASS prompt, but when I tried to display the map, I found out that it wasn't created at all. Nikos Alexandris: If there are no errors and the script ran fine, maybe you just need to check the region settings? Just for you to know, to run the script I simply create it (say myscript.py), give permissions and run it in a GRASS session with the necessary options: ./myscript.py output=outmap raster1=map1 raster2=map2 I am using Ubuntu 9.04 64bits and GRASS 6.4.ORC5. For example: # check region extent, etc. g.region -p # set region extent and resolution to the map of your interest g.region rast=outmap -pa # give color r.colors rast=outmap color=rainbow # try to display d.mon x0 d.rast outmap # is it there? Marcello Gorini: No, it is not there. To make sure I set the region to the input map: g.region rast=map1 -pa d.mon x0 d.rast map1 OK, it is there. Then I ran the script: ./myscript.py output=outmap raster1=map1 raster2=map2 After processing, I tried: d.rast outmap But then: ERROR: Raster map outmap not found What could be wrong? Nikos Alexandris: Marcello, not sure why it does not work for you. I (copied over the script from the 1st post in this thread as test_mapcalc.py, added +x to make it executable) and it works fine for me: # test run python test_mapcalc.py raster1=mod_b2 raster2=mod_b2_new output=testing_mapcalc_python_script # r.info on inputs and the output # mod_b2 r.info -r mod_b2 min=0 max=5504 # mod_b2_new r.info -r mod_b2_new min=0 max=0.5504 # output r.info -r testing_mapcalc_python_script min=0 max=5504.5504 P.S.: By the way, is this the right way to quote answers? Like (almost) always, it depends whom you are asking ;-). There are so many ways and opinions and habits and... (you can scan the archive or other mailing lists and you'll find that people even argue seriously about the correct way to reply). Personally I got stuck with _clean_ in-line bottom posting because I find it. so useful when I read older threads and understand what has been discussed and get to the point right away. I prefer to invest time and clean-out un-necessary stuff (taking though sometimes the risk to reject parts that are important?) and give a logical flow to the discussion (first the question, then the answer) in order to make it easier for any (next) reader. Regards, Nikos Hello Nikos, Thanks for the try. I tested it again with other rasters, but I got the same error. Could it possibly be something related to the 64bits architecture? Or could GRASS be sending the outcome somewhere else? Well, I guess that eventually I will go around this problem or even bump into the solution, but the most important thing to say is that I appreciated the effort and that it was a very good reception to this list. Thank you very much Nikos. And thank you also for the explanations with respect to the right way to answer posts. I will do my best to make my posts as clean and explanatory as possible. Best regards, Marcello. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Trying-python-scripts-tp5109105p5110760.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
