Coordinates & placement
Keep the map’s real-world reference and choose a working placement that suits your project.
Start with your project reference
Find the coordinate system, working origin and height reference already used by your project. Do not select a different system simply because it looks familiar.
Choose local or global placement
Local placement moves working coordinates close to an origin. Global coordinates retain full grid coordinates. The right choice depends on how your software and project handle large coordinate values.
Keep the real-world link
Moving geometry to a local origin is not the same as removing georeferencing. Where supported, the export records the reference needed to relate that origin to the map’s coordinate system. Check what your importer reads.
Check height and units
Horizontal placement, height reference and units are separate. Use the recorded height reference; do not treat “not recorded” as a confirmed datum. Check a known position and height after importing.
Is DXF local or global?
Either can be appropriate. A file extension does not determine the intended placement. Use the options offered for the format and match them to your project.
What if my model lands far away?
First compare the export placement with the project’s origin, coordinate system and units. Avoid manually moving the model until you understand the mismatch; an arbitrary move can hide a reference problem.