Hufkens Koen wrote: > for a validation exercise I need to extract the class values around certain > pixel location. > > I have a map with all the locations (numbered) and a map with the validation > map. > > The code you find below is the one I came up with to get this information > (only output to terminal for the moment). > > However, this code includes a loop and is terribly slow. Has anyone an idea > how to speed things up?
If your groundtruth points are sufficiently spaced that their buffers don't overlap[1], you can avoid the loop by creating a single buffer map rather than one for each category. [1] Or you can accept assigning overlapped cells to the nearest point. -- Glynn Clements <[EMAIL PROTECTED]> _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
