I have shapefiles of a road network and five points. What I would like to do is measure the distance from each point along the road network using QGIS, but am struggling to achieve this. So far, I have tried both v.net.distance and v.net.iso, to no avail. Each attempt returns 'Error: Vector map not found'. What could I be doing wrong?


If you use the QGIS Desktop 2.xx with GRASS 7.xx application then you may need to first import your road network and points layer.

You could use:

  • v.in.ogr - to import your layers using their path or
  • v.in.ogr.qgis - if your layers are already loaded into QGIS

You can access these tools from the menubar:

 Plugins > GRASS > Open GRASS Tools


Note that you may need to create a GRASS mapset first before using the tools.

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    Thank you, I did try this, but was still unsuccessful. I think the area is just too large. I eventually managed to achieve what I wanted using the Rocky Branches - Road Network and Contour plugins. – Bernie Sep 9 '16 at 6:44
  • @Bernie - Most welcome and glad you found a solution! You should post an answer decribing how you solved your problem and accept it by clicking the green-faded tick once posted :) – Joseph Sep 12 '16 at 9:06

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