Giovanni Manghi wrote: > > Hi all, > > > > I just made a fresh install on my pc, Ubuntu 10.04 and GRASS 6.4 rc6 > > from the Ubuntugis repository. > > > > It seems to me that v.in.ogr is quite slower if compared with my old > > installation (6.4 rc5 on Ubuntu 9.04) > > > > for example this > > > > http://thematicmapping.org/downloads/TM_WORLD_BORDERS-0.3.zip > > > > takes nearly 5 minutes and before it took much less.
Markus Metz wrote: > Here it takes nearly 30 minutes with grass64, all versions, RC5 is not > faster than RC6 or current svn. This vector is extremely dirty, > boundaries of adjacent polygons don't match, resulting in about 2300 > overlapping areas and about 2400 spurious areas (gaps between adjacent > polygons) equaling about 4700 erroneous areas for only 3775 input > polygons. Import time was reduced to 4 minutes when snapping > boundaries during import. With snapping during import and grass7, it's > down to 1 min 46 sec and the result is topologically clean. > > I would rather use another world boundary layer, e.g. UN FGGD from FAO > geonetwork. time v.in.ogr dsn=TM_WORLD_BORDERS-0.3.shp out=tm_world_borders_03 --%<--- 3775 input polygons Total area: 1.473113e+14 (8484 areas) Overlapping area: 3.402229e+09 (2294 areas) Area without category: 3.994093e+11 (2292 areas) real 55m10.964s user 54m50.060s sys 0m8.040s -->%--- :-O Nikos _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user