GEO import DWG with geographical locations

Hello, i want to use sketchup Pro as a beginner. I have imported an existing DWG from my ground and the measures schows me wrong figures/scales. I suppose it depends on wrong parameters during GEO import DWG with geographical locations.
I would be great, if somebody can explain, how import the dwg correctly.
Thanks a lot.

Depending on how the DWG was saved (particularly, from which software and what the settings were at that time) you may have to resize / scale the DWG.

Do this using a known dimension (the largest one the drawing), use the measuring tool to measure that, then type in the number it should be, SketchUp will ask if you want to scale, say yes.