[GRASS-user] Flow direction to flow accumulation

Thomas Adams tea3rd at gmail.com
Thu Nov 19 16:11:57 PST 2015


Yes; look at the GRASS raster commands: r.terraflow, r.watershed


On Thu, Nov 19, 2015 at 5:02 PM, wcd <vydramail at quick.cz> wrote:

> 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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Thomas E Adams, III
2330 Jack Warner PKWY, #334
Tuscaloosa, AL 35401

1 (513) 739-9512 (cell)
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