Re: [GRASS-user] Some questions about DEMs

2010-07-09 Thread Hamish
Maciek wrote: > For heterogenous input data I'd try the nn algorithm in > nnbathy, through r.surf.nnbathy > (http://grass.osgeo.org/wiki/Addons#r.surf.nnbathy). It is great for sparse points, but for contour lines + hydrological modeling it is not the best. See nn valley staircase effect in http

[GRASS-user] Re: v.rast.stats

2010-07-09 Thread micha
> These are my data sets attached: > > 1. Dem_CF.tif is the DEM > 2. TRMMLast1day.tif is the rainfall data > > On Fri, Jul 9, 2010 at 2:53 PM, Sandile Gumede > wrote: > >> Is there any one who can help me? I'm away this week, so I can only add a quick response: I still see two "glaring" probl

Re: [GRASS-user] Some questions about DEMs

2010-07-09 Thread Maciej Sieczka
W dniu 09.07.2010 12:29, David Townshend pisze: I have a couple of questions about DEMs, and how they work in GRASS. My application is hydrological and hydraulic analysis, and at the moment I'm investigating using r.sim.water to generate floodlines. Usually, for this sort of analysis, I would h

[GRASS-user] v.in.gpsbabel-3

2010-07-09 Thread Bulent Arikan
Thanks for all the replies. It seems that I forgot to specify the format ( _txt) in the Required tab. So, it fixed the problem and now I can import all the waypoints and tracks. However, I am puzzled with one detail. As I mentioned: - I set my GPS unit to record measurements in UTM, - the text fi

Re: [GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Etienne DELAY (deust 2010)
Le 09/07/10 17:36, Giovanni Manghi a écrit : > >> again ;-) >> in root a make >> apt-get update && apt-get install libgdal-ecw-src >> >> an erreur >> E: Impossible de trouver le paquet libgdal-ecw-src >> >> ... so I dont know >> >> see you :-) >> > > did you added the ubuntugis-unstable p

Re: [GRASS-user] v.in.gpsbabel-2

2010-07-09 Thread Hamish
Bulent wrote: > I am back with another issue, again ' v.in.gpsbabel' module! > My GPS unit records data in UTM projection with WGS84 datum. I > just attempted to import the waypoints into GRASS using a > Garmin MapSource text (tab delimited) file. $ gpsbabel --help | grep -i garmin garmin

Re: [GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Giovanni Manghi
> again ;-) > in root a make > apt-get update && apt-get install libgdal-ecw-src > > an erreur > E: Impossible de trouver le paquet libgdal-ecw-src > > ... so I dont know > > see you :-) did you added the ubuntugis-unstable ppa repository? I believe the package is part of that particular r

Re: [GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Etienne DELAY (deust 2010)
Le 09/07/10 16:26, Giovanni Manghi a écrit : > >> I just tested the procedure, and the package gdal-ecw-src is not >> found ... >> > > the library is called > > libgdal-ecw-src > > > > cheers > > -- Giovanni -- > > again ;-) in root a make apt-get update && apt-get install libgdal-ecw-s

Re: [GRASS-user] Channel Sinuosity Implemented in GRASS?

2010-07-09 Thread stephen sefick
output: Gradient Sinuosity stream reach length down valley distance This is a thought- and I have no idea how to implement it. I would like to calculate thalweg distance of a stream. from the start point (user input) search xmeters to the east and west find the minimum - move one grid cell south

Re: [GRASS-user] Channel Sinuosity Implemented in GRASS?

2010-07-09 Thread Mark Seibel
I came across this when looking previously at v.to.db. I noticed there is an option to upload line sinuosity. I haven't tried it, but I'd be curious to know if it solves your problem. Using "option = sinuous" ? http://grass.itc.it/grass64/manuals/html64_user/v.to.db.html Mark On Fri, Jul 9, 2

[GRASS-user] Channel Sinuosity Implemented in GRASS?

2010-07-09 Thread stephen sefick
All: I would like to calculate channel sinuosity on many streams that I have an upstream and downstream GPS point. Is there such a module in GRASS? I am trying to avoid doing this by hand. kindest regards, -- Stephen Sefick | Auburn University

Re: [GRASS-user] v.in.gpsbabel-2

2010-07-09 Thread Markus Metz
Bulent Arikan wrote: > Hi, > > Hamish, thanks for your suggestion about fixing the GPS Babel application > issue. It worked and now I can run the module. > > I am back with another issue, again ' v.in.gpsbabel' module! My GPS unit > records data in UTM projection with WGS84 datum. I just attempted

Re: [GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Giovanni Manghi
> I just tested the procedure, and the package gdal-ecw-src is not > found ... the library is called libgdal-ecw-src cheers -- Giovanni -- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user

Re: [GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Etienne DELAY (deust 2010)
Le 09/07/10 12:35, Giovanni Manghi a écrit : > Hi, > > > >> 1 / I'm on Ubuntu 10 and Grass6.4 since two days and I try to open the >> training ECW orthophotos with GRASS. Does someone could give me the >> procedure >> > have a look here > > http://trac.osgeo.org/ubuntugis/wiki/UserTutorials

[GRASS-user] v.in.gpsbabel-2

2010-07-09 Thread Bulent Arikan
Hi, Hamish, thanks for your suggestion about fixing the GPS Babel application issue. It worked and now I can run the module. I am back with another issue, again ' v.in.gpsbabel' module! My GPS unit records data in UTM projection with WGS84 datum. I just attempted to import the waypoints into GRA

[GRASS-user] v.rast.stats

2010-07-09 Thread Sandile Gumede
Is there any one who can help me? On Wed, Jul 7, 2010 at 3:15 PM, Sandile Gumede wrote: > Hi, > > I've tried to sort out the issue of the region resolution. Now when I'm > running v.rast.stats it says: > > ERROR: No categories found in raster map > > Here is the script I'm running thats giving m

Re: [GRASS-user] convert to utm projection

2010-07-09 Thread Daniel Victoria
I was not aware of the -p and -g flags Nicer and nicer every time On Thu, Jul 8, 2010 at 9:43 PM, Hamish wrote: > Daniel wrote: >> Complementing Varun response, take a look at the r.proj manual page >>  http://grass.ibiblio.org/grass65/manuals/html65_user/r.proj.html >> >> Specially the Notes

Re: [GRASS-user] Some questions about DEMs

2010-07-09 Thread David Townshend
On Fri, Jul 9, 2010 at 12:50 PM, Hamish wrote: > > David wrote: > > I have a couple of questions about DEMs, and how they work in GRASS. > > My application is hydrological and hydraulic analysis, and at the moment > > I'm investigating using r.sim.water to generate floodlines. > > > > Usually, for

Re: [GRASS-user] v.in.gpsbabel

2010-07-09 Thread Hamish
Bulent Arikan wrote: > I am running 6.5 svn on Snow Leopard. I am trying to import > points and tracks from a Garmin device (connected via USB). > Using GPS Babel (v 1.4.1 for Mac), I prepared several files > (.txt, .gdb, and .gpi) and tried to import these using > v.in.gpsbabel (UTM wgs84 location

Re: [GRASS-user] Some questions about DEMs

2010-07-09 Thread Hamish
David wrote: > I have a couple of questions about DEMs, and how they work in GRASS. > My application is hydrological and hydraulic analysis, and at the moment > I'm investigating using r.sim.water to generate floodlines. > > Usually, for this sort of analysis, I would have 5m contours for the > cat

Re: [GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Giovanni Manghi
Hi, > 1 / I'm on Ubuntu 10 and Grass6.4 since two days and I try to open the > training ECW orthophotos with GRASS. Does someone could give me the > procedure have a look here http://trac.osgeo.org/ubuntugis/wiki/UserTutorials cheers -- Giovanni -- _

[GRASS-user] Some questions about DEMs

2010-07-09 Thread David Townshend
Hi I have a couple of questions about DEMs, and how they work in GRASS. My application is hydrological and hydraulic analysis, and at the moment I'm investigating using r.sim.water to generate floodlines. Usually, for this sort of analysis, I would have 5m contours for the catchment and a detaile

[GRASS-user] ECW format and gdalwarp problem...

2010-07-09 Thread Etienne DELAY (deust 2010)
Hello I'm still a neophyte in GRASS. And I have two questions: 1 / I'm on Ubuntu 10 and Grass6.4 since two days and I try to open the training ECW orthophotos with GRASS. Does someone could give me the procedure thank you ___ grass-user mailing list

[GRASS-user] v.in.gpsbabel

2010-07-09 Thread Bulent Arikan
Hi, I am running 6.5 svn on Snow Leopard. I am trying to import points and tracks from a Garmin device (connected via USB). Using GPS Babel (v 1.4.1 for Mac), I prepared several files (.txt, .gdb, and .gpi) and tried to import these using v.in.gpsbabel (UTM wgs84 location) –k flag checked–. I am g

[GRASS-user] v.rast.stats

2010-07-09 Thread Sandile Gumede
Hello Micha, Can you please put all the steps including the steps for the DEM because I tried to duplicate your steps and when I get to the step of v.rast.stats, I get an error saying No categories found in raster map. I tried even to match region resolutions of the two raster maps with g.regio