Re: [GRASS-user] v.stream.* questions

[Micha Silver]

On 03/10/2019 23:56, Rich Shepard wrote: Reading the manual pages for v.stream.network, v.stream.order, and v.stream.profiler in the extensions doc I see details for the input options but all descriptions refer to raster files. The v.stream.* modules all take vector maps as input. Are there more detailed docs that show examples using the vector modules along with the raster modules? I've a complex, extensive, river network as a vector file. I've not extracted streams, basins, or watersheds from the DEM and I'd like to run the v.stream.* modules on my vector stream network. Possible? Maybe yes, but if this refers to the project that you've posted about recently, then you have a high resolution LIDAR-based DEM of the basin. These v.stream.* modules are intended to work with vector outputs from the r.stream.* modules. If you are going to ignore that and use a vector stream network from some other source, then be aware: 1- This alternate stream network must be topologically correct 2- Stream vector segments should all be in downstream direction (the outlet reach *must* be directed downstream). 3- You might not be able to make use of the DEM for other analyses, since it won't match the stream network. TIA, Rich _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/grass-user -- Micha Silver Ben Gurion Univ. Sde Boker, Remote Sensing Lab cell: +972-523-665918

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