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QGIS: exporting contours to DXF with height values

Geographic Information Systems Asked by SCH751 on March 11, 2021

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

https://www.youtube.com/watch?v=JxCxBREEqG0

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?

One Answer

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.

Answered by TeddyTedTed on March 11, 2021

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