Hi Everyone, I would like to create a raster map of temperature values using v.surf.idw and calculate the median temperature value for each state/province in North America. I currently have a point shapefile of temperature values covering all of North America, a North American area shapefile (both imported using v.in.ogr). I would like to use v.rast.stats to calculate the median value for each state/province; however, I get an "Error: no categories found in raster map". I created the temperature value raster using v.surf.idw and there are no categories associated with this file.
Can anyone tell me how I can assign categories to a raster file please? I am running Grass 6.4 on a Mac OSX Snow Leopard. Cheers, Andrew Andrew Lewin, M.Sc., Adv. Dipl. GIS President Spatial-Conserve Inc. Oceans and Coasts Blog at www.spatialconserve.com Email: [email protected] Tel: (905) 639-4646 Mobile: (905) 630-8441 Skype: andrew.lewin99 Follow me on Twitter: www.twitter.com/arlewin _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
