[GRASS-user] Grass Graphic Model v.net.distance Not Accepting point layer in From or To fields

[Joshua Geoghegan]

Hi there,

I have been stuck on a problem and I was hoping you could help, as I had no luck on GIS Stack Exchange.

I have a point and network layer connected in Grass GIS via the graphic modeler. I am trying to find the shortest path between the first point (ROUND=0) and every other point (ROUND != 0) on the same point layer. For some reason I can select this layer (layer 2) in both From and To tabs and add category 1-500 (which is more than the number of points), but when I try the where clause and test for values in the ROUND field on the SQL Builder the results show up as '', even though the imported shp file has values. When I hit OK and come back into the form it has reverted back to layer 1 in the From and To tabs, which is road network layer.

What could be the issue here?

[enter image description here]<https://i.stack.imgur.com/QV5Lz.jpg>

[enter image description here]<https://i.stack.imgur.com/ecfs6.jpg>

I've tried a number of things without luck. Hopefully you can help.

Regards,

[MPS]

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