Hi, you can use the GRASS statistic modules for that. They allow to add several input raster maps.
in your case have a look at: http://grass.osgeo.org/grass64/manuals/html64_user/r.average.html r.average - Finds the average of values in a cover map within areas assigned the same category value in a user-specified base map. Regards, Otto Am Wed, 24 Nov 2010 14:21:00 +0200 schrieb "Dr. F. Patrick Graz " <[email protected]>: > Hi folks, > I would like to create a cross table between raster maps, but can't seem to > find a way to do this. > > I have a raster map (in GRASS) that contains a number of properties. I also > have vegetation biomass data for x numbers of years (also in GRASS). > > I would now like to calculate the average biomass for each property, for > each year. > > So far I have not found the right command to do this job - or I have been > using the wrong syntax. > > Any suggestions are welcome. > > Patrick > > ------------------------------------------ > Dr. F. Patrick Graz > Snr. Researcher, > Multidisciplinary Research Centre, > University of Namibia > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
