Hi Christian,
Checked in my lab, it is not putting in correct location though we entered the lattitude and longitutde details which we get from google map.
Backgroud image is just a MAP, to point out your office location/university campus, we could manually drag and drop the campus in correct location, it will not effect your client location calculation. Make sure, while uploading floor plans , proivde correct floor length/breadth, draw region/walls to get accurate client locations.
Regards,
Pavan
If my post address your query, give kudos:)