Hi Will, When running r.watershed on a small 35 hectare watershed, it produces a fully connected stream network. However, when running r.watershed on a 6400 hectare watershed, the stream network is not fully connected. No preprocessing with regards to merging different raster maps, however, I did try using r.fill.dir first to deal with any possible depressions that might be causing non-connected stream segments. thanks, Janet
On Wed, Mar 2, 2016 at 11:22 AM, Will Fields <[email protected]> wrote: > Hi Janet, > > Can you give some more information about what you mean by larger watershed > basins? Did you do any preprocessing of the elevation raster before you > tried to extract the stream networks? Were you using an elevation raster > that had been merged from different rasters? I've ran into issues in the > past where "seams" along the original edges of a raster resulted in odd > stream networks. > > Will > > On Wed, Mar 2, 2016 at 11:40 AM, Janet Choate <[email protected]> wrote: > >> Hi GRASS community, >> When creating a stream network with r.watershed, I end up with some >> isolated stream segments - particularly in larger watershed basins. Does >> anyone know how to generate a stream network that is fully connected, or >> how to correct this issue? >> thank you, >> Janet >> >> >> >> _______________________________________________ >> grass-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/grass-user >> > > -- Tague Team Lab Manager 1005 Bren Hall UCSB, Santa Barbara, CA.
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