On Fri, Aug 16, 2013 at 6:51 PM, jencor808 <[email protected]> wrote: > Hello all~ > > I'm working with SRTM data and trying to produce watershed maps in Honduras. > For most of the country, the threshold seems to work great at 100000, but > this is not the case on the shore - those watersheds are neglected likely > due to their smaller scale. Does anyone have experience merging multiple > scales? Does this make sense? I'd rather not reduce my threshold or the > whole country because those watersheds seem too small. > > As an aside, what do people think about using SRTM for watershed mapping in > the first place - given it is a surface model and not a DEM.
While I cannot help you too much with your first question, you may take a look at Metz, M., Mitasova, H., and Harmon, R. S., 2011: Efficient extraction of drainage networks from massive, radar-based elevation models with least cost path search, Hydrol. Earth Syst. Sci., 15, 667-678, doi:10.5194/hess-15-667-2011 http://www.hydrol-earth-syst-sci.net/15/667/2011/hess-15-667-2011.html Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
