Hi All, I'm having trouble finding the solution to this in the "GRASS Book", what I've found so far creates a new data set as the result of an intersection. What I would like to do instead is update the value of an attribute based on whether the feature in that vector layer intersects with those in another vector layer. Is that possible?
In PostGIS the operation looks like: UPDATE data_set_1 SET foo = 1 FROM data_set_2 WHERE ST_Intersects(data_set_2.the_geom, data_set_1.the_geom); While this works in PostGIS, it's slow. I'd like to see if it can be done more quickly in GRASS. Thanks in advance for any assistance you can provide, Roger -- _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
