On Tue, 2011-10-04 at 16:55 +0200, Sebastian Schubert wrote: > Hi, > > I have a map with several polygons i, each having a certain value x_i. I > want to calculate the average value of x in a rectangular grid. Each > cell j of this grid includes (parts of) several polygons with A_ij being > the area of the part of polygon i being in grid cell j. With that the > average value in grid cell j is > > x_j = sum_i A_ij x_i / (sum_i A_ij) > > I was able to create a grid with Vector > Research Tools > Vector grid. > Now each cell of this grid should include the average value of all > polygons inside the cell (as described above). > > Any idea how to do that? >
You probably want to look at the GRASS module v.rast.stats > Thanks a lot! > Sebastian > > This mail was received via Mail-SeCure System. > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > > This mail was received via Mail-SeCure System. > >
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