Hi Johannes,
perhaps you procedure could be correct. Let'me try and I will notify my progress Pierluigi ----- Messaggio originale ----- Da: "Johannes Radinger" <johannesradin...@gmail.com> A: "Ing. Pierluigi De Rosa" <pierluigi.der...@gfosservices.it> Cc: "grass-user" <grass-user@lists.osgeo.org> Inviato: Giovedì, 17 dicembre 2015 11:51:15 Oggetto: Re: [GRASS-user] Average raster value of the upslope contributing area, Hi Pierluigi, I think here you could use the tool r.watershed ( https://grass.osgeo.org/grass70/manuals/r.watershed.html ) with your underlying DEM as input. This tool will provide you an accumulation map with increasing values in downstream direction. I am not exactly sure if this is your task, but if you provide an input map for 'flow' with values for each cell that represents the actual cell size than the output accumulation map output is your upslope contributing area. If you use another input map for 'flow' (e.g. sediment input per cell) than the output will be the accumulated sediment in downstream direction. Subsequently you can use r.mapcalc to divide both maps to get the ratio of sediment delivery per unit upslope contributing area. I hope that helps?! cheers, Johannes On Thu, Dec 17, 2015 at 11:29 AM, Ing. Pierluigi De Rosa < pierluigi.der...@gfosservices.it > wrote: Dear users, my deal is to calculate a raster of the sediment delivery ratio like explained here: http://data.naturalcapitalproject.org/nightly-build/invest-users-guide/html/sdr.html#sediment-delivery-ratio moreover I need to calculate, for each cell, the average of a raster (C factor) of the upslope contributing area. take a look to these image to better explication: http://data.naturalcapitalproject.org/nightly-build/invest-users-guide/html/_images/connectivity_diagram.png How can I do that? Thanks Pierluigi -- ________________________________________________________________________ Ing. Pierluigi De Rosa (PhD) Studio Associato GFOSSERVICES _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
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