>Now the issue is the data is not in the region....zero points in the region. you have to set the computational region: https://grass.osgeo.org/grass75/manuals/g.region.html have a look into the v.vol.rst-manual how to set also the 3D region ----- best regards Helmut -- Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html