I would like to calculate Strahler's and other stream hierarchy from my input raster but I am not sure how. This manual suggests tat I should use r.stream.order command, however in version 7.0.2 "order" is not a recognized command.


Not sure how you are accessing GRASS, but the documentation reads to me like this is an Addon. I just went to the command line typed "g.extension" and a window popped up that I linked to the source page (https://svn.osgeo.org/grass/grass-addons/grass7/raster/) and put in the addon name (r.stream.order)... and it did its thing... hopefully that does it for you :)

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  • I was going to suggest the same. – Fezter May 9 '16 at 22:13
  • Thanks. I came to this conclusion. Marking as answered because it answers this question. Now I have a new issue; the addon wil not install and raises an error: "ERROR: File is not a zip file: wingrass.fsv.cvut.cz/grass70/addons/grass-7.0.2/…" Any ideas? – Jakub Sisak GeoGraphics May 10 '16 at 12:51
  • This happened to me when I first tried. I changed the path on the "Optional" tab from "svn.osgeo.org/grass/grass-addons/grass7" to the path above (with /raster/ at the end)... but now I can't replicate the failure message. It seems to just be a web link, but I am not sure how it is a zip file. In theory you should be able to dump this into the command line: – Mike May 10 '16 at 15:24
  • g.extension extension=r.stream.order operation=add svnurl=svn.osgeo.org/grass/grass-addons/grass7/raster – Mike May 10 '16 at 15:24
  • Turns out i was running 7.0.2. After installing 7.0.4 i was able to install and run the addons. Of course now my extracted streams (which should run the same or similar algorithm as r.watershed) do not exactly match the stream output from r.watershed but that's another topic. – Jakub Sisak GeoGraphics May 12 '16 at 13:17

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