Re: [GRASS-user] Calling GRASS command in multi-threads
Thanks Paulo, That page really helps. I'll have a look at the Python multithreading example. I also noticed something about r.sun and OpenCL: http://grasswiki.osgeo.org/wiki/R.sun#OpenCL This page doesn't say if it is already implemented in the current version of GRASS. I do think I need to use GRASS7, am I right? I have a ATI Radeon HD 4800 with 4GB, this should speed up r.sun, right? I've looked at the download page of GRASS, but didn't see a GRASS7 installer for Windows. Isn't this available? I really don't hope I need to compile it myself ;) Thanks, Paul 2012/12/29 Paulo van Breugel p.vanbreu...@gmail.com Perhaps this will give you some useful pointers: http://grasswiki.osgeo.org/wiki/Parallel_GRASS_jobs On 12/29/2012 01:03 PM, Paul Meems wrote: Hi list, Last night my test script successfully finished processing my small area and created a annual solar radiation raster. I did a comparison with the solar radiation produced by ArcMap and noticed its radiation is almost twice as high as the one produced by Grass. Probably I'm not using the correct output files. I'm using glob_rad from r.sun as my result. I will have a closer look why this difference is happening. If anyone can give me some pointers that would be must appreciated. My real question today is how to speed up the process. My script took 7 hours to finish, but only used a fraction of the available resources. While running the script (on Windows) only 30% of my quadcore CPU was used and only 3GB of my 8GB RAM. Since I'm looping on r.sun, calling it 365 times I was thinking of calling it several times at once. Is this possible? Calling r.sun 4 or 5 times at once will decrease the time for the script to workable proportions. Probably this is more of a Python question than a GRASS question but any pointers would be very helpful. Thanks, Paul ___ grass-user mailing listgrass-user@lists.osgeo.orghttp://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] r.drain problem when flow reach the border
On Sun, Dec 30, 2012 at 11:44 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Markus I am using this commands. r.cost -k input=friction_landuse_roads output=cost_map start_points=map_source_pt stop_points=map_target_pt --o r.drain input=cost_map output=drain_map vector_points=map_target_pt --o r.drain in GRASS 6.4 does not work with cost surfaces generated with the Knight's Move (r.cost -k). Actually, r.drain does not work at all with cost surfaces in GRASS 6.4. You need the direction map together with the cost surface, and this is only available in 6.5 and 7. I have not a direction map, and as for other source-target-friction maps everything works fine without direction map I thougth that this should work for all. I doubt that it works fine if you do not use the direction map generated by r.cost, because r.drain modifies the input surface if no direction map is given, but for a cumulative cost surface these modifications introduce errors. If you have the chance, please run the command and take a look that the drain line finish on right border. I see. The output is correct with regard to the input cost surface only if a direction map is used as indir input for r.drain. I am going to backport r.cost/r.walk/r.drain from 6.5 to 6.4. Happy new year, Markus M best wishes miltinho 2012/12/30, Markus Metz markus.metz.gisw...@gmail.com: On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Rashad I tested with the trunk svn, but apparently it still not worked to me. Are you able to test with my datased? https://www.yousendit.com/download/UW16RE9zTkxlM1JBSXNUQw What are the commands you used? I found r.drain input=custo_aux_cost output=custo_aux_cost_drain vector_points=map_target_pt You need to also provide a direction map with the indir option of r.drain. Markus M Thanks! miltinho 2012/12/27, Mohammed Rashad mohammedrasha...@gmail.com: Hi Milton, I think this fix will solve the problem[0]. For elevation data there might be cases where no path exists ie, only single pixel is the selected path. I had tested it by myself and it worked. Please apply the patch and let me know. If any problem comes in compilation or doing r.drain let me know. It will be great if you can share the test data you are using in case not working after applying the patch [0] http://trac.osgeo.org/grass/attachment/ticket/1840/r.drain.diff [1] http://trac.osgeo.org/grass/attachment/ticket/1840/drain.c On Thu, Dec 27, 2012 at 2:31 AM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Mohamed and Markus Mohamed, thanks for your reply, I will wait for a solution within GRASS :-) Markus, thanks for your reply,. Sorry but I disagree a tiny bit, because is expected that between a source and target I will find a solution with the Least Cost path. Do you think that is there any situation where a least cost between source and target will not be found? Maybe if other software provide the soluction, although is not the bestest option, I prefere receive one complete output than a broken one. Happy new year! miltinho 2012/12/23, Markus Metz markus.metz.gisw...@gmail.com: On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Dear all, I am running a least cost path analysis combining r.cost and r.drain. But on some cases, when the least cost path between source and target reach the border of my map, r.drain stop on that position, and target point isn´t reached. This is correct because at the borders, the direction can not be determined, the path could lead out of the current region, you can not tell. Running on other softwares the algorithms the source and target is connected using edges without problem. If in doubt, I would call it a bug in that other software. Any hint are welcome. Try to expand the current region Markus M -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- Regards, Rashad -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone:
Re: [GRASS-user] Calling GRASS command in multi-threads
Hi Paul, On Mon, Dec 31, 2012 at 11:37 AM, Paul Meems bontepaar...@gmail.com wrote: I also noticed something about r.sun and OpenCL: http://grasswiki.osgeo.org/wiki/R.sun#OpenCL This page doesn't say if it is already implemented in the current version of GRASS. I do think I need to use GRASS7, am I right? I have a ATI Radeon HD 4800 with 4GB, this should speed up r.sun, right? well, only if you compile that particularly modified r.sun/OpenCL version which didn't make it so far into core GRASS. It may be worthwhile to study OpenMP support for r.sun since it is offered by the gcc compiler directly. Unfortunately OpenMP is a bit tricky. I've looked at the download page of GRASS, but didn't see a GRASS7 installer for Windows. Isn't this available? Ops, yes, it is: I have just added the missing link at http://grass.osgeo.org/download/software/ms-windows/ - SVN nightly winGRASS 7 experimental builds Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.drain problem when flow reach the border
Markus Metz wrote: I am going to backport r.cost/r.walk/r.drain from 6.5 to 6.4. Done in r54470-1. Happy new year, Markus M best wishes miltinho 2012/12/30, Markus Metz markus.metz.gisw...@gmail.com: On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Rashad I tested with the trunk svn, but apparently it still not worked to me. Are you able to test with my datased? https://www.yousendit.com/download/UW16RE9zTkxlM1JBSXNUQw What are the commands you used? I found r.drain input=custo_aux_cost output=custo_aux_cost_drain vector_points=map_target_pt You need to also provide a direction map with the indir option of r.drain. Markus M Thanks! miltinho 2012/12/27, Mohammed Rashad mohammedrasha...@gmail.com: Hi Milton, I think this fix will solve the problem[0]. For elevation data there might be cases where no path exists ie, only single pixel is the selected path. I had tested it by myself and it worked. Please apply the patch and let me know. If any problem comes in compilation or doing r.drain let me know. It will be great if you can share the test data you are using in case not working after applying the patch [0] http://trac.osgeo.org/grass/attachment/ticket/1840/r.drain.diff [1] http://trac.osgeo.org/grass/attachment/ticket/1840/drain.c On Thu, Dec 27, 2012 at 2:31 AM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Mohamed and Markus Mohamed, thanks for your reply, I will wait for a solution within GRASS :-) Markus, thanks for your reply,. Sorry but I disagree a tiny bit, because is expected that between a source and target I will find a solution with the Least Cost path. Do you think that is there any situation where a least cost between source and target will not be found? Maybe if other software provide the soluction, although is not the bestest option, I prefere receive one complete output than a broken one. Happy new year! miltinho 2012/12/23, Markus Metz markus.metz.gisw...@gmail.com: On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Dear all, I am running a least cost path analysis combining r.cost and r.drain. But on some cases, when the least cost path between source and target reach the border of my map, r.drain stop on that position, and target point isn´t reached. This is correct because at the borders, the direction can not be determined, the path could lead out of the current region, you can not tell. Running on other softwares the algorithms the source and target is connected using edges without problem. If in doubt, I would call it a bug in that other software. Any hint are welcome. Try to expand the current region Markus M -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- Regards, Rashad -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org
Re: [GRASS-user] r.drain problem when flow reach the border
Hi Markus Thanks for all your help. Please, which svn command I need to run to get the daily trunk subversion? best miltinho 2012/12/31, Markus Metz markus.metz.gisw...@gmail.com: Markus Metz wrote: I am going to backport r.cost/r.walk/r.drain from 6.5 to 6.4. Done in r54470-1. Happy new year, Markus M best wishes miltinho 2012/12/30, Markus Metz markus.metz.gisw...@gmail.com: On Sun, Dec 30, 2012 at 8:59 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Rashad I tested with the trunk svn, but apparently it still not worked to me. Are you able to test with my datased? https://www.yousendit.com/download/UW16RE9zTkxlM1JBSXNUQw What are the commands you used? I found r.drain input=custo_aux_cost output=custo_aux_cost_drain vector_points=map_target_pt You need to also provide a direction map with the indir option of r.drain. Markus M Thanks! miltinho 2012/12/27, Mohammed Rashad mohammedrasha...@gmail.com: Hi Milton, I think this fix will solve the problem[0]. For elevation data there might be cases where no path exists ie, only single pixel is the selected path. I had tested it by myself and it worked. Please apply the patch and let me know. If any problem comes in compilation or doing r.drain let me know. It will be great if you can share the test data you are using in case not working after applying the patch [0] http://trac.osgeo.org/grass/attachment/ticket/1840/r.drain.diff [1] http://trac.osgeo.org/grass/attachment/ticket/1840/drain.c On Thu, Dec 27, 2012 at 2:31 AM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Mohamed and Markus Mohamed, thanks for your reply, I will wait for a solution within GRASS :-) Markus, thanks for your reply,. Sorry but I disagree a tiny bit, because is expected that between a source and target I will find a solution with the Least Cost path. Do you think that is there any situation where a least cost between source and target will not be found? Maybe if other software provide the soluction, although is not the bestest option, I prefere receive one complete output than a broken one. Happy new year! miltinho 2012/12/23, Markus Metz markus.metz.gisw...@gmail.com: On Sun, Dec 23, 2012 at 7:07 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Dear all, I am running a least cost path analysis combining r.cost and r.drain. But on some cases, when the least cost path between source and target reach the border of my map, r.drain stop on that position, and target point isn´t reached. This is correct because at the borders, the direction can not be determined, the path could lead out of the current region, you can not tell. Running on other softwares the algorithms the source and target is connected using edges without problem. If in doubt, I would call it a bug in that other software. Any hint are welcome. Try to expand the current region Markus M -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- Regards, Rashad -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations
Re: [GRASS-user] r.drain problem when flow reach the border
On Mon, Dec 31, 2012 at 3:05 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Markus Thanks for all your help. Please, which svn command I need to run to get the daily trunk subversion? See here: http://trac.osgeo.org/grass/wiki/Release/6.4.3RC2-News -- SVN Checkout latest 6.4 release branch (including unreleased bugfixes): Best MarkusN ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.drain problem when flow reach the border
Hi all, thanks again for the help with this. I tried several versions of 6.4X (6.42 weekly snapshot, 6.43.. ) and 6.5 but in none of them, when I try to see the parameters for create output direction on r.cost man page I can't see how can I generate direction for input on r.drain. Including the suggestion of M.Neterler svn checkout https://svn.osgeo.org/grass/grass/branches/develbranch_6 grass6_devel Sorry to do this so trouble, but maybe I am not finding where can I get an updated version of r.cost, r.drain and r.walk. Happy 2013! miltinho 2012/12/31, Markus Neteler nete...@osgeo.org: On Mon, Dec 31, 2012 at 3:05 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Markus Thanks for all your help. Please, which svn command I need to run to get the daily trunk subversion? See here: http://trac.osgeo.org/grass/wiki/Release/6.4.3RC2-News -- SVN Checkout latest 6.4 release branch (including unreleased bugfixes): Best MarkusN -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.drain problem when flow reach the border
On Mon, Dec 31, 2012 at 3:52 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi all, thanks again for the help with this. I tried several versions of 6.4X (6.42 weekly snapshot, 6.43.. ) and 6.5 but in none of them, when I try to see the parameters for create output direction on r.cost man page I can't see how can I generate direction for input on r.drain. For r.cost and r.walk, the option to write directions to a raster map is outdir, see http://grass.osgeo.org/grass65/manuals/r.cost.html http://grass.osgeo.org/grass65/manuals/r.walk.html For r.drain, the option to use directions as input is indir, see http://grass.osgeo.org/grass65/manuals/r.drain.html Including the suggestion of M.Neterler svn checkout https://svn.osgeo.org/grass/grass/branches/develbranch_6 grass6_devel Sorry to do this so trouble, but maybe I am not finding where can I get an updated version of r.cost, r.drain and r.walk. Within the root directory of the source tree svn up Markus M Happy 2013! miltinho 2012/12/31, Markus Neteler nete...@osgeo.org: On Mon, Dec 31, 2012 at 3:05 PM, Milton Cezar Ribeiro miltinho.astrona...@gmail.com wrote: Hi Markus Thanks for all your help. Please, which svn command I need to run to get the daily trunk subversion? See here: http://trac.osgeo.org/grass/wiki/Release/6.4.3RC2-News -- SVN Checkout latest 6.4 release branch (including unreleased bugfixes): Best MarkusN -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.drain problem when flow reach the border
On Mon, Dec 31, 2012 at 4:41 PM, Markus Metz markus.metz.gisw...@gmail.com wrote: see http://grass.osgeo.org/grass65/manuals/r.cost.html http://grass.osgeo.org/grass65/manuals/r.walk.html For r.drain, the option to use directions as input is indir, see http://grass.osgeo.org/grass65/manuals/r.drain.html Just FYI: I forced the creation of the 6.4 manual an hour ago, so that's also already updated (usually it happens on Saturdays). MarkusN ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Upon improving the GRASS-wiki
Nikos: BTW, where are the official GRASS-color combinations? Martin: logos ? http://grass.osgeo.org/download/logos/ Nikos: Thought maybe I missed some list with the official colors. Markus: You can grab them from the logos. The old green is in the stylesheet here: http://grassold.osgeo.org/ For the new CMS, we made it a bit warmer: http://grass.osgeo.org/ I agree that we should list the RGB/hex values on the logos page. Adding this in my ToDo list. Nikos signature.asc Description: This is a digitally signed message part. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.drain problem when flow reach the border
Hi there Everything worked fine. Congrats for all your great job on GRASS-GIS solution, and again many thanks for the effert on deal with this in the transition 2012/2013 (yes! 2013 in Australia and other places around world!). best wishes miltinho 2012/12/31, Markus Neteler nete...@osgeo.org: On Mon, Dec 31, 2012 at 4:41 PM, Markus Metz markus.metz.gisw...@gmail.com wrote: see http://grass.osgeo.org/grass65/manuals/r.cost.html http://grass.osgeo.org/grass65/manuals/r.walk.html For r.drain, the option to use directions as input is indir, see http://grass.osgeo.org/grass65/manuals/r.drain.html Just FYI: I forced the creation of the 6.4 manual an hour ago, so that's also already updated (usually it happens on Saturdays). MarkusN -- Miltinho - m...@rc.unesp.br Laboratório de Ecologia Espacial e Conservação - LEEC Depto de Ecologia - UNESP - Rio Claro Av. 24A, 1515- Bela Vista 13506-900 Rio Claro, SP, Brasil Fone: +55 19 3526-9647 (office) 19 3526-9680 (lab) Cel: 19 9853-3220 / 19 9853-5430 Depto Ecologia http://www.rc.unesp.br/ib/ecologia/ PG ECO BIODIV http://www.rc.unesp.br/ib/ecologia/posbiodiversidade/index.php CV http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4792988H6mostrarNroCitacoesISI=truemostrarNroCitacoesScopus=true Google citations http://scholar.google.com/citations?user=OWX_2eAJ ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] r.mapcalc generates one pixel map
Hello, I'm a GIS student and in my project I need to generate vegetation indexes. I've generated it succesfully yesterday using both python2.7 and grass gui .I'm using WinGRASS-6.5.svn-r54428-453 on Win7. Today -I don't know why- grass started to generate 1 pixel NDVI map. The formula is as simple as it could be: float(b4-b3)/(b4+b3) as most of you already know. My data is not corrupted, I'd saved original maps somewhere else and it was my first check that whether there is a corruption. Also using QGis 1.8.1 I can generate correct NDVI map with same data. You can check it here: r.info map=ndvi4@PERMANENT ++ | Layer: ndvi4@PERMANENT Date: Tue Jan 01 04:06:35 2013 | | Mapset: PERMANENT Login of Creator: murat | | Location: newLocation | | DataBase: D:\gis\grassWS | | Title: ( ndvi4 ) | | Timestamp: none | || | | | Type of Map: raster Number of Categories: 255 | | Data Type: FCELL | | Rows: 1 | | Columns: 1 | | Total Cells: 1 | | Projection: UTM (zone 36) | | N: 1 S: 0 Res: 1 | | E: 1 W: 0 Res: 1 | | Range of data: min = nan max = nan | | | | Data Description: | | generated by r.mapcalc | | | | Comments: | | float(L71175034_03420050627_B40@PERMANENT - | | L71175034_03420050627_B30@PERMANENT) / | | (L71175034_03420050627_B40@PERMANENT + | | L71175034_03420050627_B30@PERMANENT) | | | ++ (Tue Jan 01 04:06:51 2013) Command finished (0 sec) I uninstalled WinGRASS-6.5.svn-r54428-453 and installed WinGRASS-7.0.svn-r54453-453, I've deleted mapset and location and the recrated them also. I couldn't think anything else please give me some information. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] r.mapcalc generates one pixel map
Gökçen Güner wrote: I'm a GIS student and in my project I need to generate vegetation indexes. I've generated it succesfully yesterday using both python2.7 and grass gui .I'm using WinGRASS-6.5.svn-r54428-453 on Win7. Today -I don't know why- grass started to generate 1 pixel NDVI map. The map generated by r.mapcalc (and by most r.* commands) has the bounds and resolution of the current region. Use g.region to set the region to something more appropriate. -- Glynn Clements gl...@gclements.plus.com ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
