Hi, one of my colleague is dealing with flow accumulation calculation in GRASS, and comparing results with Esri ArcGIS (builtin Flow Accumulation [1]). Tool in ArcGIS to me knowledge uses D8, so we run r.watershed with -s flag and also -a flag to avoid negative values. Resultant values are very different.
* Esri ArcGIS (range: 0 - 20741) * r.watershed -s (range: -34068 - 5697) * r.watershed -sa (1 - 34068) Do you have idea why results are so different? Thanks for any pointers in advance! Martin [1] http://desktop.arcgis.com/en/arcmap/10.5/tools/spatial-analyst-toolbox/flow-accumulation.htm -- Martin Landa http://geo.fsv.cvut.cz/gwiki/Landa http://gismentors.cz/mentors/landa _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user
