Posted by dellus on Jun 23, 2023; 3:49pm
URL: https://forum.librecad.org/Merge-2-dxf-files-or-import-dxf-file-as-layer-tp5722953p5722965.html

The contour map says it's units are inches. Can this be true? If you measure some distance in the map does it make sense? If the file really is from an official survey institution and not edited it should be a reliable document, thus more the base to build on than the other file, which seems to be vectorized from a paper scan or a pdf. It's units is said to be mm. What is the original scale of the the paper map? Do you know a real world length from something in the "vector map"?
If the units question can be cleared I would take the contour map as reference and scale up the vector map accordingly.
LibreCAD is a pure 2D app, so any 3D data are lost when importing.