Understanding about georeferenced OBJ models generated using ODM

[Saijin_Naib]

Welcome!

OBJ does not actually support georeferencing, so the model uses a local coordinate reference system with offsets.

You’d need to apply those offsets to reference positions to georeference it properly.

See this for some more information:

Upload WebODM Output to ArcGIS Pro

I suppose that is possible that the OBJs aren’t actually georeferenced themselves. This GIS StackExchange question/answer seems to imply the same. From briefly looking over the Wiki about OBJ, it doesn’t seem like the spec was designed to hold any CRS and is based around a local (0,0,0) coordinate system. I suppose you could translate that, but I’m not sure how. Looks like Pix4D handles this OBJ limitation by writing out an offset file: