Okay, so I found out more information. I reclassed the raster layer to give myself some categories; however, when I tried to run v.rast.stats I got an error saying "No categories found in raster map"
Your help is much appreciated. Andrew Andrew Lewin [email protected] Founder of Oceans and Coasts Blog President Coastal/Marine Spatial Ecologist Spatial-Conserve Incorporated Associate C-FOAM (Canadian Fisheries, Oceans and Aquaculture Management Group) Telfer School of Management, University of Ottawa On 2010-08-26, at 2:56 PM, Andrew Lewin wrote: > 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 >
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