I have a .tiff data file that generates contours in QGIS. I save it as .dxf. The contours don't have any attributes or data. That's bad, because I want to make a 3D landscape in Revit using the information.
How do a save/export the contour lines from QGIS so that they have a z-elevation attribute or at least some information?
I ticked the attributes box when extracting the contours, but the attributes doesn't show in the dxf.