Yes, I found this problems too for using v.strahler.. so we tried to solve with r.strahler.. but we still have some problems for low values of (r.wateshed) threshold.. but maybe Jarek has a better way with this new approach to the problem.. just "no dependencies" sounds good.. so we wait for good news!
Annalisa 2009/7/28 Jarek Jasiewicz <jar...@amu.edu.pl> > > > stephen sefick pisze: > >> I have compiled and used Jarek's stream order script and the results >> look to be satisfactory- good job!. >> > You use windows as I remember, isn't it It is very important for me if > program also work on windows. Please send me aslo feeback about time of > analysis and size of maps > >> I am having a hard time creating >> vectors from this raster representation. r.thin -> r.to.vect creates >> lots of erroneous squares that I believe are there as an artifact of >> the larger stream networks. >> > It is problem that no streams are marked as 0 (for now, it will be fixed to > null). For now try to > convert 0 to null with mapcalc formula: neworder=if(order=0,null(),order) > and try again. > >> The lower order (smaller) streams look >> fine, but when you start getting to the higher order streams +5 I >> think the r.thin algorithm may have problems delineating a stream. >> > > Is >> there a way around this? I would be happy with a line that ran >> through the middle of the stream for now. Some trick converting to >> points and then to lines? Or something along those lines. Is there a >> way to connect centroids? I have made an area map of the streams >> raster- can I connect the areas together? Thanks for any help. >> thanks, >> >> >> > I just work on another module which will be convert stream netowork to > correct vector stream network (in most cases r.to.vect do not it well) i > thing it is metter of next week. > > _______________________________________________ > grass-user mailing list > grass-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/grass-user >
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