Hi Shane, If your network dataset is directed, you could use: https://github.com/NINAnor/gudbrand_hydro/blob/master/v.igraph.order.py to classify the nodes from which you then can generate the outlet vector point map for v.stream.order.
If your network is not directed, you could use v.to.points or v.net to dump the points, add altitude information from a terrain model (v.what.rast), and then extract the lowest points as outlets (requires some SQL). For more support we would need a bit more information about your data… Cheers Stefan From: Shane Carey <[email protected]> Sent: tirsdag 1. mai 2018 10.29 To: Stefan Blumentrath <[email protected]> Subject: Re: [GRASS-user] Stream order from existing stream network layer Hi Stefan, I had a look at this, but it requires a point layer also - which I don't have unfortunately. Thanks Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant On Tue, May 1, 2018 at 7:57 AM, Stefan Blumentrath <[email protected]<mailto:[email protected]>> wrote: Hi Shane, Please have a look at: https://grass.osgeo.org/grass74/manuals/addons/v.stream.order.html Then you can use v.rast.stats to collect some statistics… Cheers Stefan From: grass-user <[email protected]<mailto:[email protected]>> On Behalf Of Shane Carey Sent: tirsdag 1. mai 2018 00.37 To: grass-user grass-user <[email protected]<mailto:[email protected]>> Subject: [GRASS-user] Stream order from existing stream network layer Hi, Is there way of calculating the stream order from an existing vector dataset in Grass GIS? The vector layer has been created from manual digitising. In addition, is it possible to obtain other stream characteristics for this layer that you would obtain from "r.stream.segment" Thanks in advance Le gach dea ghui, Shane Carey GIS and Data Solutions Consultant
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