Re: [GRASS-user] Precision of raster/vector float values
On Thu, Aug 23, 2012 at 11:52 PM, Glynn Clements gl...@gclements.plus.com wrote: Markus Metz wrote: So if I understand you correctly: 1.0e-15 is the smallest number for values in attribute columns although the values in a DCELL raster can be smaller? A bottleneck is v.what.rast which converts the queried raster values into text with 15 decimal points? So is there any (future) way to have similar precision in a DCELL raster and its corresponding point vector (r.to.vect - v.what.rast)? The short answer is no because binary values have to be converted to text which for fp values is lossy. Note that the round-trip conversion isn't *inherently* lossy. It's possible to convert any binary floating-point value to decimal exactly. Arbitrary decimal values cannot be converted to (binary) floating-point values exactly, but decimal values which were generated from a floating-point value will convert back to the original value provided that sufficient decimal digits are used. The decimal representation doesn't have to be exact, only sufficiently accurate to be distinguishable from the adjacent floating-point values. Conversion to and from text is only lossy because the number of digits required to avoid this is excessive for any other purpose (double precision can represent the circumference of the earth to within 9 nanometres; no actual measurement will be that precise). So I misunderstood something about IEEE precision, sorry about the confusion! Coming back to the original problem, it seems that it can be solved for DCELL by using .15g instead of .10f, i.e. use the same formatting rules like e.g. r.what and d.what.rast. I tested and the values uploaded to the database are correct with .15g for DCELL. Markus M ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Precision of raster/vector float values
Hi, So I misunderstood something about IEEE precision, sorry about the confusion! Coming back to the original problem, it seems that it can be solved for DCELL by using .15g instead of .10f, i.e. use the same formatting rules like e.g. r.what and d.what.rast. I tested and the values uploaded to the database are correct with .15g for DCELL. Markus M sounds good if the origiinal problem can be solved for DCELL. If I understand you correctly this means that v.what.rast needs to be slighly changed? Do I need to do it myself or will there be an update in a new revision for 6.4.3 and/or 6.5? /johannes ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] After Qgis installation - GRASS6.4 doesn't start anymore
Hi, Please check how many files remained in /usr/lib/grass64/. Perhaps QGIS removed it to install again GRASS (which failed)? Before installing QGIS (at the time when GRASS is still launching), there is no grass64 folder in /usr/lib but there is the folder /usr/local/grass6.4.3SVN. This seems the location where the command grass64 is probably pointing to. I am not sure what is the correct directory for a selfcompiled GRASS installation using checkinstall? And I need to build GRASS myself (different versions, add ons, own scripts and add-ons etc.) and the GRASS compilation itself is not the problem. After installing QGIS (even from the ubuntugis-unstable ppa) the usr/lib/grass64 is existing. So the QGIS installation (even without the GRASS plugin) installs a version of GRASS64 and this installation seems to change the link of grass64 to the new installation. So probably just the link for grass64 has to be reset again to my real GRASS6.4?! I tried to reinstall GRASS GIS after the QGIS installation using make -j2 sudo checkinstall sudo ldconfig but the problem still remains, although I thought that the ldconfig might solve the problem. /Johannes What if you reinstall again GRASS6.4 with your make -j2 sudo checkinstall sudo ldconfig ? guessing, Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Importing ASCII file
I think you should run r.in.ascii http://grass.osgeo.org/grass63/manuals/html63_user/r.in.ascii.html if you want to use r.sun you have to import the digital terrain model first. then you have to create a slope and an aspect rasters and then run r.sun with the r.slope.aspect command http://grass.osgeo.org/grass63/manuals/html63_user/r.slope.aspect.html and then finally running r.sun El 24/08/12 03:13, sotototo escribió: Hi, Im new to Grass GIS and I have the same problem. I have an ascii Lidar data set with XYZ values in the following format. ncols 1999 nrows 1998 xllcorner 459000.27618609 yllcorner 298999.76202791 cellsize 0.5 NODATA_value - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - When I run r.in.arc I get the following error. Illegal yllcorner value in header: 298999.76202791 Illegal latitude for North ERROR: Can't get cell header I tried r.in.xyz and I got this error. ERROR: Not enough data columns. Incorrect delimiter or column number? Found the following character(s) in row 1: [ncols 1999] I also tried the r3.in.ascii and i got this error. ERROR: readHeaderString: header value invalid .. So could you please tell me if i do something wrong? I actually want to use the r.sun algorithm to calculate solar radiation and if Im not mistaken the first step is to import first the ascii file to GRASS. Thank you -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997492.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 -- Alberto Pettazzi MeteoGalicia - Departamento de Climatología y Observación Consellería de Medio Ambiente, Territorio e Infraestruturas Rúa de Roma, 6 15707 Santiago de Compostela. A Coruña Teléfono: +34-881-999646 e-mail: alberto.petta...@meteogalicia.es mailto:alberto.petta...@meteogalicia.es ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] After Qgis installation - GRASS6.4 doesn't start anymore
Hi! Just as a suggestion .. If you are self compiling GRASS - you should probably also self compile QGIS .. As it seems that QGIS expects some GRASS files in decent positions you could tell QGIS where to find the GRASS version you would like to use and compile it .. Maybe that solves a lot of that problems.. And I hope you don't expect QGIS to work with several versions of GRASS at the same time (out of the box) - that would not work without some starting scripts where you set PATHS .. HTH kind regards Werner On Fri, Aug 24, 2012 at 10:45 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, Please check how many files remained in /usr/lib/grass64/. Perhaps QGIS removed it to install again GRASS (which failed)? Before installing QGIS (at the time when GRASS is still launching), there is no grass64 folder in /usr/lib but there is the folder /usr/local/grass6.4.3SVN. This seems the location where the command grass64 is probably pointing to. I am not sure what is the correct directory for a selfcompiled GRASS installation using checkinstall? And I need to build GRASS myself (different versions, add ons, own scripts and add-ons etc.) and the GRASS compilation itself is not the problem. After installing QGIS (even from the ubuntugis-unstable ppa) the usr/lib/grass64 is existing. So the QGIS installation (even without the GRASS plugin) installs a version of GRASS64 and this installation seems to change the link of grass64 to the new installation. So probably just the link for grass64 has to be reset again to my real GRASS6.4?! I tried to reinstall GRASS GIS after the QGIS installation using make -j2 sudo checkinstall sudo ldconfig but the problem still remains, although I thought that the ldconfig might solve the problem. /Johannes What if you reinstall again GRASS6.4 with your make -j2 sudo checkinstall sudo ldconfig ? guessing, Markus ___ 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] Importing ASCII file
Hi, I think that the real problem is about the projection system in your raster file: xllcorner 459000.27618609 yllcorner 298999.76202791 and the error: Illegal latitude for North = grass just say that a latitue of 298999° is irrelevant ;) so there are 2 possibilities: 1 - your raster file use a projection and you need to import it into a new location with this projection 2 - the raster is really in decimal lat/lon, but *1 = xllcorner = 45.9 ° and yllcorner = 29.89° as your are using lidar data at a resolution of 0,5 it seems to me that the unit used in your ratser coordinate is meters, so you need to know the raster coordinate system before you can use it ;) cheers, Sylvain 2012/8/24 Alberto Pettazzi alberto.petta...@meteogalicia.es I think you should run r.in.ascii http://grass.osgeo.org/grass63/manuals/html63_user/r.in.ascii.html if you want to use r.sun you have to import the digital terrain model first. then you have to create a slope and an aspect rasters and then run r.sun with the r.slope.aspect command http://grass.osgeo.org/grass63/manuals/html63_user/r.slope.aspect.html and then finally running r.sun El 24/08/12 03:13, sotototo escribió: Hi, Im new to Grass GIS and I have the same problem. I have an ascii Lidar data set with XYZ values in the following format. ncols 1999 nrows 1998 xllcorner 459000.27618609 yllcorner 298999.76202791 cellsize 0.5 NODATA_value - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - When I run r.in.arc I get the following error. Illegal yllcorner value in header: 298999.76202791 Illegal latitude for North ERROR: Can't get cell header I tried r.in.xyz and I got this error. ERROR: Not enough data columns. Incorrect delimiter or column number? Found the following character(s) in row 1: [ncols 1999] I also tried the r3.in.ascii and i got this error. ERROR: readHeaderString: header value invalid .. So could you please tell me if i do something wrong? I actually want to use the r.sun algorithm to calculate solar radiation and if Im not mistaken the first step is to import first the ascii file to GRASS. Thank you -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997492.html Sent from the Grass - Users mailing list archive at Nabble.com. ___ grass-user mailing listgrass-user@lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/grass-user -- Alberto Pettazzi MeteoGalicia - Departamento de Climatología y Observación Consellería de Medio Ambiente, Territorio e Infraestruturas Rúa de Roma, 6 15707 Santiago de Compostela. A Coruña Teléfono: +34-881-999646 e-mail: alberto.petta...@meteogalicia.es ___ 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] Bathymetric data
Lyle, I'm searching for bathymetric data that can be uploaded of the bottom of the Atlantic Ocean that will include the seamounts. Basically at the same resolution that one sees with Google woud work for what I need. The GEBCO data is probably what you are looking for. Google uses it as well: http://www.gebco.net/data_and_products/gridded_bathymetry_data/ Best, Peter -- Dr. Peter Löwe peter.lo...@gmx.de ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] How to get centroid coordinates
Hi, I have a vector of polygons and i want to create a vector of points with the centroids of the polygons, with a connected table showing their coordinates. Which is the simplest way to do that on G7? Thanks -- Dr. Margherita Di Leo ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Precision of raster/vector float values
On Fri, Aug 24, 2012 at 10:40 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, So I misunderstood something about IEEE precision, sorry about the confusion! Coming back to the original problem, it seems that it can be solved for DCELL by using .15g instead of .10f, i.e. use the same formatting rules like e.g. r.what and d.what.rast. I tested and the values uploaded to the database are correct with .15g for DCELL. Markus M sounds good if the origiinal problem can be solved for DCELL. If I understand you correctly this means that v.what.rast needs to be slighly changed? Do I need to do it myself or will there be an update in a new revision for 6.4.3 and/or 6.5? In my tests, uploading e.g. 2.5e-5 instead of 0.25 to attribute tables works, but I am not sure if it works with all db backends. I am also not sure if you will get the same value out after some processing because sometimes %lf is used which prints by default only 6 decimal places, I think. There are various binary - text conversions happening in the db library, and they do not seem to be consistent. That is, depending on what you are going to do with the attributes, it may or may not work. v.what and v.db.select should work, though. v.what.rast is now fixed in all branches, r52869-71. Markus M ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to get centroid coordinates
Hi Margherita. I have a vector of polygons and i want to create a vector of points with the centroids of the polygons, with a connected table showing their coordinates. Which is the simplest way to do that on G7? In GRASS 6.4.*: -- extract centroids from polygon map v.extract in=poly out=centr type=centroid -- if needed convert centroids to points v.type in=centr out=centr_pts type=centroid,point -- add attribute table to points v.db.addtable centr_pts col=x double,y double,z double -- insert coords in table v.to.db TMP_centr_pts option=coor col=x,y,z I think in GRASS 7.0 it will be similar. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Precision of raster/vector float values
On Fri, Aug 24, 2012 at 11:27 AM, Markus Metz markus.metz.gisw...@gmail.com wrote: On Fri, Aug 24, 2012 at 10:40 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, So I misunderstood something about IEEE precision, sorry about the confusion! Coming back to the original problem, it seems that it can be solved for DCELL by using .15g instead of .10f, i.e. use the same formatting rules like e.g. r.what and d.what.rast. I tested and the values uploaded to the database are correct with .15g for DCELL. Markus M sounds good if the origiinal problem can be solved for DCELL. If I understand you correctly this means that v.what.rast needs to be slighly changed? Do I need to do it myself or will there be an update in a new revision for 6.4.3 and/or 6.5? In my tests, uploading e.g. 2.5e-5 instead of 0.25 to attribute tables works, but I am not sure if it works with all db backends. I am also not sure if you will get the same value out after some processing because sometimes %lf is used which prints by default only 6 decimal places, I think. %lf is used by sscanf and correct for double. Maybe everything is fine now? Markus M There are various binary - text conversions happening in the db library, and they do not seem to be consistent. That is, depending on what you are going to do with the attributes, it may or may not work. v.what and v.db.select should work, though. v.what.rast is now fixed in all branches, r52869-71. Markus M ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Importing ASCII file
Hi, The projection system that I use is British_National_Grid Transverse_Mercator and the GCS_OSGB_1936. I imported the projection and the I ran r.in.arc and it worked! Thank you very much Actually my main purpose is to run the r.sun algorithm and calculate an annual solar radiation if possible. The ascii file that I use is already digitized from a DSM because I want to use certain areas(roofs) to calculate the solar radiation. So to use r.sun for my ascii file do I have to import first the original DSM dataset and calculate slope and aspect with r.slope.aspect and then run r.sun importing my ascii file? Does this makes sence at all? Thank you very much -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997571.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] After Qgis installation - GRASS6.4 doesn't start anymore
On Fri, Aug 24, 2012 at 10:51 AM, Werner Macho werner.ma...@gmail.com wrote: Hi! Just as a suggestion .. If you are self compiling GRASS - you should probably also self compile QGIS .. As it seems that QGIS expects some GRASS files in decent positions you could tell QGIS where to find the GRASS version you would like to use and compile it .. Maybe that solves a lot of that problems.. And I hope you don't expect QGIS to work with several versions of GRASS at the same time (out of the box) - that would not work without some starting scripts where you set PATHS .. This seems one step forward, I built and installed qgis from source and before GRASS6.4.3. After removing a package called grass-core (which probably comes with the QGIS and causes the problems) both GRASS and QGIS starts. During the QGIS make I set the GRASS prefix to my original /usr/local/grass6.4.3. Anyway I couldn't fine anything how to build/install the GRASS-QGIS plugin. Are there any instructions? Trying to install it via apt-get fails because: Depends: qgis (= 1.8.0-1~precise1) but 20120824-1 (self-compiled) is to be installed. BTW both QGIS and GRASS are installed via checkinstall. I am not really convinced if it really needed or if it might cause any problems (with versions etc)? Would it get very messy if just sudo make install is used? Any recommendations on that? /johannes HTH kind regards Werner On Fri, Aug 24, 2012 at 10:45 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, Please check how many files remained in /usr/lib/grass64/. Perhaps QGIS removed it to install again GRASS (which failed)? Before installing QGIS (at the time when GRASS is still launching), there is no grass64 folder in /usr/lib but there is the folder /usr/local/grass6.4.3SVN. This seems the location where the command grass64 is probably pointing to. I am not sure what is the correct directory for a selfcompiled GRASS installation using checkinstall? And I need to build GRASS myself (different versions, add ons, own scripts and add-ons etc.) and the GRASS compilation itself is not the problem. After installing QGIS (even from the ubuntugis-unstable ppa) the usr/lib/grass64 is existing. So the QGIS installation (even without the GRASS plugin) installs a version of GRASS64 and this installation seems to change the link of grass64 to the new installation. So probably just the link for grass64 has to be reset again to my real GRASS6.4?! I tried to reinstall GRASS GIS after the QGIS installation using make -j2 sudo checkinstall sudo ldconfig but the problem still remains, although I thought that the ldconfig might solve the problem. /Johannes What if you reinstall again GRASS6.4 with your make -j2 sudo checkinstall sudo ldconfig ? guessing, Markus ___ 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] datum vs. sphere (grib files)
Hi, I am currently using some grib files for meteorological data. When I set a location referring to a georeferenced grib file, a default WGS84 is assigned to it, because datum is unknown datum: ** unknown (default: WGS84) ** Actually, the grib files are referred to a sphere, so that there is an error related to the use of WGS84. Usually the resolution of grib data is so coarse that it doesn't really affect the information, but now I need to estimate correctly the error in a given point. To do that, I need to define in GRASS a location using the sphere instead of the default WGS84. How can I do that? Is there in PROJ4 the definition of sphere, and a related EPSG? why is it unknown? Thanks for any hint. Regards, -- Dr. Margherita Di Leo ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to get centroid coordinates
Hi Alexander, On Fri, Aug 24, 2012 at 11:42 AM, Alexander Muriy amu...@gmail.com wrote: Hi Margherita. I have a vector of polygons and i want to create a vector of points with the centroids of the polygons, with a connected table showing their coordinates. Which is the simplest way to do that on G7? In GRASS 6.4.*: -- extract centroids from polygon map v.extract in=poly out=centr type=centroid -- if needed convert centroids to points v.type in=centr out=centr_pts type=centroid,point -- add attribute table to points v.db.addtable centr_pts col=x double,y double,z double -- insert coords in table v.to.db TMP_centr_pts option=coor col=x,y,z I think in GRASS 7.0 it will be similar. Yes, indeed. I used: v.extract in=poly out=centr type=centroid v.type in=centr out=centr_pts from_type=centroid to_type=point v.db.addcolumn map=centr_pts col=x double precision,y double precision v.to.db map=centr_pts option=coor col=x,y Thanks! -- Dr. Margherita Di Leo ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Precision of raster/vector float values
On Fri, Aug 24, 2012 at 11:53 AM, Markus Metz markus.metz.gisw...@gmail.com wrote: On Fri, Aug 24, 2012 at 11:27 AM, Markus Metz markus.metz.gisw...@gmail.com wrote: On Fri, Aug 24, 2012 at 10:40 AM, Johannes Radinger johannesradin...@gmail.com wrote: Hi, So I misunderstood something about IEEE precision, sorry about the confusion! Coming back to the original problem, it seems that it can be solved for DCELL by using .15g instead of .10f, i.e. use the same formatting rules like e.g. r.what and d.what.rast. I tested and the values uploaded to the database are correct with .15g for DCELL. Markus M sounds good if the origiinal problem can be solved for DCELL. If I understand you correctly this means that v.what.rast needs to be slighly changed? Do I need to do it myself or will there be an update in a new revision for 6.4.3 and/or 6.5? In my tests, uploading e.g. 2.5e-5 instead of 0.25 to attribute tables works, but I am not sure if it works with all db backends. I am also not sure if you will get the same value out after some processing because sometimes %lf is used which prints by default only 6 decimal places, I think. %lf is used by sscanf and correct for double. Maybe everything is fine now? Markus M There are various binary - text conversions happening in the db library, and they do not seem to be consistent. That is, depending on what you are going to do with the attributes, it may or may not work. v.what and v.db.select should work, though. v.what.rast is now fixed in all branches, r52869-71. Markus M I also tried v.what.rast again and it seems that is works now perfectly. Thank you for the fast responce and fixing the problem. /johannes ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] How to get centroid coordinates
Hi, 2012/8/24 Margherita Di Leo direg...@gmail.com: v.extract in=poly out=centr type=centroid v.type in=centr out=centr_pts from_type=centroid to_type=point v.db.addcolumn map=centr_pts col=x double precision,y double precision v.to.db map=centr_pts option=coor col=x,y you could also use v.out.ascii v.out.ascii in=poly type=centroid 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] Importing ASCII file
I tested the r.sun algorithm on my DSM and DTM dataset by importing the DSM first and then executing the r.slope.aspect algorithm. Then I run the the r.sun algorithm and I imported the DSM, slope and aspect and as an output I chose only the Total global irradiance/irradiation option. The result was a very low resolution image.(Very large pixels) My DSM-DTM data set has a resolution of 0.5 meters though. Does this means that r.sun has a fixed resolution or am I doing something wrong? Thank you in advance. -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997661.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] Importing ASCII file
I tested the r.sun algorithm on my DSM and DTM dataset by importing the DSM first and then executing the r.slope.aspect algorithm. Then I run the the r.sun algorithm and I imported the DSM, slope and aspect and as an output I chose only the Total global irradiance/irradiation option. The result was a very low resolution image.(Very large pixels) My DSM-DTM data set has a resolution of 0.5 meters though. Does this means that r.sun has a fixed resolution or am I doing something wrong? Thank you in advance. -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997663.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] Importing ASCII file
I tested the r.sun algorithm on my DSM and DTM dataset by importing the DSM first and then executing the r.slope.aspect algorithm. Then I run the the r.sun algorithm and I imported the DSM, slope and aspect and as an output I chose only the Total global irradiance/irradiation option. The result was a very low resolution image.(Very large pixels) My DSM-DTM data set has a resolution of 0.5 meters though. Does this means that r.sun has a fixed resolution or am I doing something wrong? Thank you in advance. -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997673.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] Importing ASCII file
Hi, The problem was that I had to run the g.region first so that I would set up my raster resolution!!! Then I imported my DSM, ran first r.slope.aspect to calculate slope and aspect and then I ran the r.sun algorithm and I had my first correct results!! Thank you very much everybody for your valuable help!! -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997732.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] Importing ASCII file
Hi, Is there a way to calculate automatically the annual radiation in r.sun because the algorithm calculates one day at a time. Thank you -- View this message in context: http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997735.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
