I am using this video tutorial to create ground contours for a noise model in iNoise.


See tutorial 8 https://dgmrsoftware.com/products/inoise/gallery/

When I import the dxf file it has no height data. Not sure where I'm going wrong as all the layers have height data when checked in QGIS.

It seems I loose it when exporting as a dxf.

This question may indicate that dxf has no height values but is drawn to height. Not sure.

Exporting QGIS contour attributes in DXF file?

  • Currently there's the to-be-fixed issue that QGIS doesn't export attributes when exporting to DXF. So... you need a work around. What are you going to do with the dxf-file?
    – Erik
    Sep 22, 2020 at 6:57
  • I import the dxf into iNoise (noise modelling program) as height lines to create the terrain.
    – Scott
    Sep 23, 2020 at 3:18

1 Answer 1


Try using the Set Z value tool in Processing Toolbox > Vector geomoetry instead of Grass.

Use the icon to the right of the Z Value input and click Edit to add an expression. For the expression just write "ELEV".

Then when you are exporting the layer to DXF make sure the Include z-dimension box is checked, if it isn't then set the Geometry type to LineString and then check the box.

  • Thanks. Will give it a go.
    – Scott
    Sep 23, 2020 at 3:19

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