Hello all, Does GRASS have a tool equivalent to what ArcGIS calls Flow Accumulation <http://resources.arcgis.com/EN/HELP/MAIN/10.2/index.html#/Flow_Accumulation/009z00000051000000/>? Input is a flow direction raster and output is a cumulative catchment area raster. As an optional argument you can specify a weight raster, which is really important for what I am trying to do - count cells of woodland upstream from each cell in the flow direction grid.
All GRASS tools I thought could do this require DTM as input, not flow direction raster, and they also don't allow to specify the weight raster. As far as I can see. Do you know about any other OSGeo tools that could do this? Ideally Python friendly? Best regards, Filip Kral.
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