Re: [GRASS-user] How to rescale
On 09/01/12 20:42, leonidas wrote: I created a raster using *r.grow.distance* I need to rescale that file to a scale 0-255 but in reverse order where high values in distance file will be converted in low values to the rescaled file. I'm using the following command: r.recode input=dist_file output=recoded_file EOF 0:133000:255:0 EOF [BTW: I don't know how you formatted your mail, but for me the above three lines showed as: * * But the output file has a range 60-255 What's going wrong? Is there any better way to do that? Are you sure that 133000 is the max of your map in the region you are using ? Be aware that r.info gives the info for the whole map, ignoring region settings and a possible mask. You can use r.univar or r.stats to see the max in the current region/mask. Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] problems with colors resulting of an image fusion
On 09/01/12 19:16, Moritz Lennert wrote: On 09/01/12 00:50, Markus Neteler wrote: On Fri, Jan 6, 2012 at 5:42 PM, Moritz Lennert mlenn...@club.worldonline.be wrote: Hi everyone, I have some troubles with image fusion through IHS transformation of a Landsat image. Hi Moritz, could you please post the procedure you used? The same procedure as the one you describe in the book, i.e. the classical i.rgb.his i.his.rgb approach with grey.eq color table for the resulting three bands. I'll try to write up a reproducible example, including relevant data if the NC set does not show the same behaviour. Ok, here we go using nc_spm_08: - Using real-color channels I get weird colors g.region rast=lsat7_1002_20@PERMANENT r.colors lsat7_1002_30@PERMANENT color=grey.eq r.colors lsat7_1002_20@PERMANENT color=grey.eq r.colors lsat7_1002_10@PERMANENT color=grey.eq g.region -p rast=lsat7_1002_80@PERMANENT i.rgb.his red_input=lsat7_1002_30@PERMANENT green_input=lsat7_1002_20@PERMANENT blue_input=lsat7_1002_10@PERMANENT hue_output=h intensity_output=i saturation_output=s --o i.his.rgb hue_input=h@fusion_test intensity_input=lsat7_1002_80@PERMANENT saturation_input=s@fusion_test red_output=fr green_output=fg blue_output=fb --o r.colors map=fr@fusion_test color=grey.eq r.colors map=fg@fusion_test color=grey.eq r.colors map=fb@fusion_test color=grey.eq Color composite before fusion (d.rgb -o red=lsat7_2002_30@PERMANENT green=lsat7_2002_20@PERMANENT blue=lsat7_2002_10@PERMANENT): http://geog-pc40.ulb.ac.be/grass/fusion_test/d_rgb_30_20_10_grey_eq.png Color composite after fusion (d.rgb -o red=fr@fusion_test green=fg@fusion_test blue=fb@fusion_test): http://geog-pc40.ulb.ac.be/grass/fusion_test/d_rgb_fr_fg_fb_grey_eq.png - Using near-infrared false color composition the colors are as expected: g.region rast=lsat7_2002_30@PERMANENT r.colors lsat7_2002_40@PERMANENT color=grey.eq r.colors lsat7_2002_30@PERMANENT color=grey.eq r.colors lsat7_2002_20@PERMANENT color=grey.eq g.region -p rast=lsat7_2002_80@PERMANENT i.rgb.his red_input=lsat7_2002_40@PERMANENT green_input=lsat7_2002_30@PERMANENT blue_input=lsat7_2002_20@PERMANENT hue_output=h intensity_output=i saturation_output=s --o i.his.rgb hue_input=h@fusion_test intensity_input=lsat7_2002_80@PERMANENT saturation_input=s@fusion_test red_output=pir_fr green_output=pir_fg blue_output=pir_fb --o r.colors map=pir_fr@fusion_test color=grey.eq r.colors map=pir_fg@fusion_test color=grey.eq r.colors map=pir_fb@fusion_test color=grey.eq Color composite before fusion (d.rgb -o red=lsat7_2002_40@PERMANENT green=lsat7_2002_30@PERMANENT blue=lsat7_2002_20@PERMANENT): http://geog-pc40.ulb.ac.be/grass/fusion_test/d_rgb_40_30_20_grey_eq.png Color composite after fusion (d.rgb -o red=pir_fr@fusion_test green=pir_fg@fusion_test blue=pir_fb@fusion_test): http://geog-pc40.ulb.ac.be/grass/fusion_test/d_rgb_pir_fr_fg_fb_grey_eq.png Can anyone reproduce this ? Any explanation ? Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] python scripting using eclipse
Hello everyone, I would like to run some scripts using python. I am not a computer scientist/engineer, just a python newbie, but I find that's a really interesting matter. Thus, I followed the instructions here: http://grass.osgeo.org/wiki/Using_Eclipse_to_develop_GRASS_Python_programs and doing so i was able to run from Eclipse the following simple script under windows (WinGRASS 6.4RC2): -- -- #!/usr/bin/env python # # # MODULE: model # # AUTHOR(S): ismael # # PURPOSE: Script generated by wxGUI Graphical Modeler. # # DATE: Mon Dec 19 18:49:29 2011 # # import sys import os import atexit import grass.script as grass def cleanup(): pass def main(): grass.run_command(v.extract --overwrite, input = parcelas@Modelo1a, output = parcelasLucrativas, where = Lucr=1) grass.run_command(v.overlay --overwrite, ainput = fincas@Modelo1a, binput = parcelasLucrativas, output = Xik, operator = and) return 0 if __name__ == __main__: options, flags = grass.parser() atexit.register(cleanup) sys.exit(main()) -- -- However, when I try to run it in linux (both Ubuntu 11.10 and Linux Mint 12 installations using the ppa repository) i always get error messages like the following: -- Traceback (most recent call last): File /home/rosie/Dropbox/REPARCELIA-COMUN/GIS/script/GRASS/Modelo1a/modelo1a.py, line 40, in module sys.exit(main()) File /home/rosie/Dropbox/REPARCELIA-COMUN/GIS/script/GRASS/Modelo1a/modelo1a.py, line 28, in main where = Lucr=1) File /usr/lib/grass64/etc/python/grass/script/core.py, line 176, in run_command ps = start_command(*args, **kwargs) File /usr/lib/grass64/etc/python/grass/script/core.py, line 164, in start_command return Popen(args, **popts) File /usr/lib/grass64/etc/python/grass/script/core.py, line 55, in __init__ startupinfo, creationflags) File /usr/lib/python2.6/subprocess.py, line 623, in __init__ errread, errwrite) File /usr/lib/python2.6/subprocess.py, line 1141, in _execute_child raise child_exception OSError: [Errno 2] No such file or directory -- Since my knowledge is still very limited, I've spent three days turnning around it without success. Could someone give me some hint on where to start to find a solution for this, please? Also: when I run it, how/where could I get more information on the processes running further than those console messages? (sorry, i guess that's more a Eclipse/Python question than a GRASS one) Thank you very much in advance. Regards, Ismael G. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Grass 6.4.2 on mac with lion
I'm trying to compile GRASS 6.4.2 on my macbook with Lion OSX. I stopped at one point. How can I solve my problem? Thanks. Salvatore MacBook-Pro-di-Salvatore-Mellino:grass-6.4.2RC2 salvatore$ ./configure --enable-sysv --with-x --with-opengl=x11 --without-odbc --with-cxx --with-sqlite --with-sqlite-libs=/Library/Frameworks/SQLite3.framework/unix/lib --with-sqlite-includes=/Library/Frameworks/SQLite3.framework/unix/include --with-fftw --with-fftw-includes=/Library/Frameworks/FFTW3.framework/unix/include --with-fftw-libs=/Library/Frameworks/FFTW3.framework/unix/lib --with-postgres-includes=/usr/local/pgsql/include --with-postgres-libs=/usr/local/pgsql/lib checking host system type... i386-apple-darwin11.2.0 checking for gcc... gcc checking whether the C compiler (gcc ) works... yes checking whether the C compiler (gcc ) is a cross-compiler... no checking whether we are using GNU C... yes checking whether gcc accepts -g... yes checking for Cygwin environment... no checking for mingw32 environment... no checking for executable suffix... no checking for full floating-point support... yes checking for pwd... /bin/pwd checking for source directory... /Users/salvatore/GIS/grass-6.4.2RC2 checking for build directory... /Users/salvatore/GIS/grass-6.4.2RC2 checking for svnversion... /usr/bin/svnversion checking for MacOSX App... no checking for MacOSX architectures... no checking for MacOSX SDK... no checking how to build libraries... shared checking for ranlib... ranlib checking how to run the C preprocessor... gcc -E checking if 64bit support is requested... no checking if 64bit Sparc VIS support is requested... no checking system version (for dynamic loading)... Darwin-11.2.0 checking for dlopen in -ldl... yes checking for ar... ar checking for additional include dirs... checking for additional library dirs... checking for a BSD compatible install... /usr/bin/install -c checking for flex... flex checking for yywrap in -lfl... yes checking for bison... bison -y checking for ranlib... ranlib checking for ar... ar checking for env... env checking for perl... /usr/bin/perl checking for ANSI C header files... yes checking for limits.h... yes checking for termio.h... no checking for termios.h... yes checking for unistd.h... yes checking for values.h... no checking for f2c.h... no checking for g2c.h... no checking for sys/ioctl.h... yes checking for sys/mtio.h... no checking for sys/resource.h... yes checking for sys/time.h... yes checking for sys/timeb.h... yes checking for sys/types.h... yes checking for sys/utsname.h... yes checking for libintl.h... no checking for iconv.h... yes checking for langinfo.h... yes checking whether time.h and sys/time.h may both be included... yes checking for off_t... yes checking for uid_t in sys/types.h... yes checking return type of signal handlers... void checking for Cygwin environment... no checking for ftime... yes checking for gethostname... yes checking for gettimeofday... yes checking for lseek... yes checking for nice... yes checking for time... yes checking for uname... yes checking for seteuid... yes checking for setpriority... yes checking for setreuid... yes checking for setruid... yes checking for drand48... yes checking for putenv... yes checking for setenv... yes checking for nanosleep... yes checking whether setpgrp takes no argument... yes checking for long long int... yes checking for W11... no checking for X... no checking whether to use Curses... yes checking for curses.h... yes checking curses.h WINDOW structure component... NONE checking for initscr in -lncurses... yes checking for keypad in -lncurses... yes checking for gtty in -lcompat... no checking for gtty in -lbsd-compat... no checking for gtty in -lbsd... no checking for library containing cuserid... no checking for xdrmem_create... yes checking for asprintf... yes checking for atan... yes checking for dlsym... yes checking for iconv... no checking for iconv in -liconv... yes checking for socket... yes checking for location of zlib includes... checking for zlib.h... yes checking for location of zlib library... checking for deflate in -lz... yes checking for location of External PROJ.4 includes... checking for proj_api.h... yes checking External PROJ.4 version... 470 checking for location of External PROJ.4 library... checking for pj_get_def in -lproj... yes checking for location of External PROJ.4 data files... configure: warning: *** External PROJ.4 directory not specified; default will be used checking for /usr/local/share/proj/epsg... yes checking for nad2bin... /usr/local/bin/nad2bin checking whether to use regex... yes checking for location of regex includes... checking for regex.h... yes checking for location of regex library... checking for regcomp... yes checking whether to use Readline... no checking whether to use JPEG... yes checking for location of JPEG includes... checking for jpeglib.h... yes checking for location of JPEG library... checking for jpeg_start_compress
[GRASS-user] Re: How to rescale
Indeed, I run *r.univar* and the max value is 101812!!! So using: r.recode input=dist_coastline output=recoded_file 0:101812:255:0 the range of the output file was 0-255 I also checked Markus method. eval `r.univar -g map=myrast` returns max value = 101812.211145335 I re-run r.recode using 101812.211145335 as max value. Running r.univar for the two output files I get defferent results (but very simiral): Output from Markus method: Output from Moritz method: -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/How-to-rescale-tp7169303p7177559.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] Filling an Area Added to Vector Map
I've not done this before and my trial-and-error approach doesn't work. I need to add a reservoir to a stream system so I used the on-screen editing feature to digitize the area, then rebuilt the topology. But, despite having a fill color selected the new area is not filled. I've attached a screenshot and the reservoir is the heavy-lined area near the center of the map. What step(s) have I missed here? I need to have that area filled so the underlying stream channels are hidden, but it's the same blue color as the stream channels. TIA, Richattachment: screenshot-small.png___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Filling an Area Added to Vector Map
On 01/11/2012 11:59 AM, Rich Shepard wrote: I've not done this before and my trial-and-error approach doesn't work. I need to add a reservoir to a stream system so I used the on-screen editing feature to digitize the area, then rebuilt the topology. But, despite having a fill color selected the new area is not filled. I've attached a screenshot and the reservoir is the heavy-lined area near the center of the map. What step(s) have I missed here? I need to have that area filled so the underlying stream channels are hidden, but it's the same blue color as the stream channels. TIA, Rich In the GIS vector world you have points, lines and polygons. Typically (in most) applications a single layer can only be 1 of the 3. What you digitized is the outline of an area as a line feature. To make a fillable polygon you can convert that or redigitize it in it's own polygon layer. These instructions are to achieve the visual look you describe, modeling it as a reservoir for a network is a whole different story. Enjoy, Alex ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Filling an Area Added to Vector Map
On Wed, 11 Jan 2012, Alex Mandel wrote: What you digitized is the outline of an area as a line feature. To make a fillable polygon you can convert that or redigitize it in it's own polygon layer. I did not realize that I needed a new layer since the last time I digitized in GRASS was with version 4.0 (whenever that was in the early 1990s). I can digitize this in the lakes layer (where it should have already been visible). Thanks, Alex, Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Filling an Area Added to Vector Map
On Wed, 11 Jan 2012, Rich Shepard wrote: I discovered the problem: some layers obscure others. The problem is not that one layer covers another, but that one layer just will not display. I've no idea why not. There are 4 vector layers but only 3 will display. It seems that the last to be added to the display doesn't. Very strange. Rich ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] python scripting using eclipse
Many thanks, Martin!! Kind regards, isma PhD student @ Urban Land Planning Department @ ETSICCPM UPM www.caminos.upm.es 2012/1/11 Martin Landa landa.mar...@gmail.com Hi, 2012/1/11 Ismael Gómez gomez.ism...@gmail.com: # PURPOSE: Script generated by wxGUI Graphical Modeler. ... grass.run_command(v.extract --overwrite, seems to be bug in Graphical Modeler, it should be grass.run_command(v.extract, overwrite = True, Martin -- Martin Landa landa.martin gmail.com * http://geo.fsv.cvut.cz/~landa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to import as vector?
On Wed, Jan 11, 2012 at 1:25 PM, Bulent Arikan bulent.ari...@gmail.com wrote: Dear List, I found a plan / architectural drawing online. I am not sure about the resolution but JPG version is 25 Mb and TIFF version is 410 Kb. I want to import the drawing as vector into 'xy location' and then rectify it. I already did rectify the image as raster but I will need a vector layer. Looking at 'v.in.ogr' I am not sure how to bring images of such formats into GRASS as vector. Raster to vector transformation does not work. Since it is a raster map you have (at least) two options: - use it as background for a digitizer (likely a lot of work) - try image processing to get out raster lines, then r.thin and subsequently r.to.vect with lines. This much depends on the JPG quality. - (there are some autotracer tools, too) Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to import as vector?
Thank you for the suggestions! Yes, it will be a lot of work and time consuming to digitize it. I was also suggested to use Inkscape to autotrace it and save it in (svg). However, saving it as (svg) does not help because 'v.in.ogr' does not seem to import that format. I even saved it as (dxf) but the import failed –nothing showed up after importing it as vector layer– with 'v.in.ogr' and 'v'in.dxf'. Is there a separate module for importing (svg) files or should I use a different file extension? Thank you, Bulent On Thu, Jan 12, 2012 at 1:49 AM, Markus Neteler nete...@osgeo.org wrote: On Wed, Jan 11, 2012 at 1:25 PM, Bulent Arikan bulent.ari...@gmail.com wrote: Dear List, I found a plan / architectural drawing online. I am not sure about the resolution but JPG version is 25 Mb and TIFF version is 410 Kb. I want to import the drawing as vector into 'xy location' and then rectify it. I already did rectify the image as raster but I will need a vector layer. Looking at 'v.in.ogr' I am not sure how to bring images of such formats into GRASS as vector. Raster to vector transformation does not work. Since it is a raster map you have (at least) two options: - use it as background for a digitizer (likely a lot of work) - try image processing to get out raster lines, then r.thin and subsequently r.to.vect with lines. This much depends on the JPG quality. - (there are some autotracer tools, too) Markus -- BÜLENT ARIKAN, PhD Senior Research Fellow Research Center for Anatolian Civilizations Koç University İstiklal Caddesi No: 181 Merkez Han Beyoğlu - ISTANBUL TURKEY 34433 (+ 90) 212-393-6036 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
