Re: [GRASS-dev] r.cva output file missing
By going through the r.cva options I finally figured out the key to doing 'sites' analysis without triggering a segfault: use the -i flag. This flag seems to tell r.cva to ignore fields in the vector map that may define the parameters spot, offseta, offsetb, azimuth1, azimuth2, vert1, vert2, radius1, and radius2. (My sites map did not have fields with these parameters.) Example of what worked: --- GRASS 6.2.2 (Lambert):~ r.cva -f -i input=sle_demp_5pt sites=sle_unc3_1pt output=sle_view18 obs_elev=0 target_elev=0 max_dist=2000 type=sites 100% Creating raster map 'sle_view18' Writing raster map 'sle_view18': 100% Sample: requested = 0.4% attempted = 0.4% actual = 0.4% Creating support files Job finished --- The parameters spot, offseta, etc. when entered in the r.cva command work as global settings, but I still got a segfault unless -i was also used. e.g.: --- GRASS 6.2.2 (Lambert):~ r.cva -f -h input=sle_demp_5pt sites=sle_unc3_1pt output=sle_view20 max_dist=2000 type=sites spot=0 offseta=0 offsetb=0 azimuth1=0 azimuth2=360 vert1=90 vert2=-90 radius1=100 radius2=1000 curvc=0.0 100% Creating raster map 'sle_view20' Writing raster map 'sle_view20': 100% Segmentation fault --- Thanks for your inputs and suggestions! Without them I might have given up. One quick note on an inconsistency I noticed between the r.cva extension and its documentation: The help file says The range is -90 to 0 for 'VERT1' and 0 to 90 for 'VERT2' whereas the r.cva dialog window sets a range of 0 to 90 for VERT1 and -90 to 0 for VERT2. Don't know if this affects the calculations. ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] r.cva output file missing
Rebecca Mayer wrote: What is the size and x-y resolution of your mapset? nsres: 86.08807728 ewres: 86.08807728 rows: 3793 cols: 3719 cells: 14106167 Try adjusting the cell sizes so that you have integer cell extents. r.cva works in this mapset when set to 'random' but not 'sites' type of analysis. Would the cell extents still be the problem? Yes, but only if you are running this on Windows. Below are the terminal outputs for three runs using the same the dem file. In the first run I used a binary raster map to define 1 viewpoint for a 'sites' analysis and got a segfault. In the second run I used a vector map to define 1 viewpoint for a 'sites' analysis and got a segfault. The third run was set to 'random' with a sample frequency designed to produce one viewpoint. This run completed successfully. Terminal output: - GRASS 6.2.2 (Lambert):~ r.cva -f input=sle_demp_5pt viewpt_mask=sle_unc3_1pt output=sle_view13 obs_elev=60 target_elev=1.6 max_dist=2000 type=sites curvc=0.13 Segmentation fault This one crashes because you are using an unsupported combination of options. Type=sites *must* be used in conjunction with an input vector map of site location(s). This is really a bug in the r.cva options parser. Instead of crashing, it should show an appropriate error message. GRASS 6.2.2 (Lambert):~ r.cva -f input=sle_demp_5pt sites=sle_unc3_1pt output=sle_view14 obs_elev=60 target_elev=1.6 max_dist=2000 type=sites curvc=0.13 100% Creating raster map 'sle_view14' Writing raster map 'sle_view14': 100% Sample: requested = 10.0% attempted = 0.1% actual = 0.1% Creating support files WARNING: unable to find [sle_view14] in [viewtest] WARNING: category support for [sle_view14] in mapset [viewtest] missing Segmentation fault This one looks strange. The calculations actually do finish correctly but writing the final output map fails for some reason. Try dropping all options except for type=sites and sites=vectmap and work your way from there. Careful with option curvc. It is basically untested and nobody ever checked whether it gives sane results. Which version of r.cva are you using? Where did you download it? Benjamin GRASS 6.2.2 (Lambert):~ r.cva -f input=sle_demp_5pt output=sle_view151 obs_elev=60 target_elev=1.6 max_dist=2000 seed=1 sample=.1 type=random curvc=0.13 Creating raster map 'sle_view151' Percentage complete: 100% Writing raster map 'sle_view151': 100% Sample: requested = 0.1% attempted = 0.1% actual = 0.1% Creating support files Job finished -- Benjamin Ducke Senior Applications Support and Development Officer Oxford Archaeological Unit Limited Janus House Osney Mead OX2 0ES Oxford, U.K. Tel.: ++44 (0)1865 263 800 [EMAIL PROTECTED] ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] r.cva output file missing
What is the size and x-y resolution of your mapset? Try adjusting the cell sizes so that you have integer cell extents. Benjamin rmayer wrote: More details on the problem described above: writing the output file is failing because of a segmentation fault error. var/log/messages reads localhost kernel: r.cva[7511]: segfault at 0005 eip 00120040 esp bfc5a464 error 4 -- Benjamin Ducke Senior Applications Support and Development Officer Oxford Archaeological Unit Limited Janus House Osney Mead OX2 0ES Oxford, U.K. Tel.: ++44 (0)1865 263 800 [EMAIL PROTECTED] ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] r.cva output file missing
What is the size and x-y resolution of your mapset? nsres: 86.08807728 ewres: 86.08807728 rows: 3793 cols: 3719 cells: 14106167 Try adjusting the cell sizes so that you have integer cell extents. r.cva works in this mapset when set to 'random' but not 'sites' type of analysis. Would the cell extents still be the problem? Below are the terminal outputs for three runs using the same the dem file. In the first run I used a binary raster map to define 1 viewpoint for a 'sites' analysis and got a segfault. In the second run I used a vector map to define 1 viewpoint for a 'sites' analysis and got a segfault. The third run was set to 'random' with a sample frequency designed to produce one viewpoint. This run completed successfully. Terminal output: - GRASS 6.2.2 (Lambert):~ r.cva -f input=sle_demp_5pt viewpt_mask=sle_unc3_1pt output=sle_view13 obs_elev=60 target_elev=1.6 max_dist=2000 type=sites curvc=0.13 Segmentation fault GRASS 6.2.2 (Lambert):~ r.cva -f input=sle_demp_5pt sites=sle_unc3_1pt output=sle_view14 obs_elev=60 target_elev=1.6 max_dist=2000 type=sites curvc=0.13 100% Creating raster map 'sle_view14' Writing raster map 'sle_view14': 100% Sample: requested = 10.0% attempted = 0.1% actual = 0.1% Creating support files WARNING: unable to find [sle_view14] in [viewtest] WARNING: category support for [sle_view14] in mapset [viewtest] missing Segmentation fault GRASS 6.2.2 (Lambert):~ r.cva -f input=sle_demp_5pt output=sle_view151 obs_elev=60 target_elev=1.6 max_dist=2000 seed=1 sample=.1 type=random curvc=0.13 Creating raster map 'sle_view151' Percentage complete: 100% Writing raster map 'sle_view151': 100% Sample: requested = 0.1% attempted = 0.1% actual = 0.1% Creating support files Job finished ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
Re: [GRASS-dev] r.cva output file missing
More details on the problem described above: writing the output file is failing because of a segmentation fault error. var/log/messages reads localhost kernel: r.cva[7511]: segfault at 0005 eip 00120040 esp bfc5a464 error 4 -- View this message in context: http://www.nabble.com/r.cva-output-file-missing-tp16383178p16452226.html Sent from the Grass - Dev mailing list archive at Nabble.com. ___ grass-dev mailing list grass-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-dev
