Why not just store GPS coordinates and do geospatial queries? which gives you nice features like "show me stuff within X kilometres of a shop" and "is cutomer X within bounding box Y?".
That might help to some extent depending on the use case, but the tectonic plates are moving all the time, and shifting a lot in some places where you have geological events like earthquakes. A set of GPS coordinates may no longer point to your current (moved) location accurately in that case.
