Just an idea: v.surf.rst/idw/etc for both datasets r.mapcalc diff=old-new cell area*diff sum
Maris. 2008/3/19, Andrew Schroeder <[EMAIL PROTECTED]>: > Hi Everyone, > > Can you tell me if GRASS is able to detect change between two input > polyline shapefiles? I have a 5m contour set for two different years at > a particular mine, and I'm looking for a way to automate detection of > the yearly pit advances. > > Basically, I'm looking for something to subtract file A from file B > (b-a=change) and output a file showing just the lines that changed > between the two files. > > Thanks for any direction you can offer. > > > Andrew Schroeder > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
