Hello, which GRASS version are you using and on which plattform?
I did it with GRASS 6.4.0RC6 on Linux using the example GRASS dataset and it worked without problems: v.rast.stats -e vector=geol...@permanent layer=1 raster=elevat...@permanent colprefix=new_ percentile=90 and the new attribute table when querying the vector file looks like this: cat : 270 onemap_pro : 333074592 PERIMETER : 191354.515625 GEOL250_ : 271 GEOL250_ID : 270 GEO_NAME : CZig SHAPE_area : 333074608.99 SHAPE_len : 191354.519722 new__n : 24 new__min : 106.708168 new__max : 108.974335 new__range : 2.266167 new__mean : 107.466569 new__stdde : 0.653831 new__varia : 0.427495 new__cf_va : 0.608404 new__sum : 2579.197662 new__first : 106.772 new__media : 107.506 new__third : 107.803 new__per90 : 108.416 regards, Martin On Freitag, 6. August 2010 10:22:10 katrin eggert wrote: > Hi > Thanks Martin but It's not working. With the following command > v.rast.stats -c -e --verbose vector=s...@permanent > raster=se...@permanentcolprefix=stat > > I'm getting this error: > Adding columns ' stat_n INTEGER, stat_min DOUBLE PRECISION, stat_max DOUBLE > PRECISION, stat_range DOUBLE PRECISION, stat_mean DOUBLE PRECISION, > stat_stdde DOUBLE PRECISION, stat_varia DOUBLE PRECISION, stat_cf_va DOUBLE > PRECISION, stat_sum DOUBLE PRECISION, stat_first DOUBLE PRECISION, > stat_media DOUBLE PRECISION, stat_third DOUBLE PRECISION, stat_per90 DOUBLE > PRECISION' > C:/GRASS6/scripts/v.rast.stats: line 268: v.db.addcol: > command not found > ERROR: Cannot continue (problem adding columns). > > Why am I getting this? Or, what I have to do before I run v.rast.stat? > Thanks > Kat > > > > 2010/8/5 Martin Wegmann <[email protected]> > > > Hello, > > > > I think v.rast.stats is what you are looking for > > > > http://grass.itc.it/gdp/html_grass64/v.rast.stats.html > > > > regards, Martin > > > > On Donnerstag, 5. August 2010 18:25:37 katrin eggert wrote: > > > Hello > > > > > > I have polygon layer which divides my image into several areas all > > > contiguous. With the same size, I have a raster image. I want to: > > > > > > - calculate the most frequent value of the raster inside each polygon; > > > > > > - the maximum and minimum value inside each polygon > > > > > > How can this be done in GRASS? > > > > > > > > > Thanks > > > > > > Katrin _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
