Sorry @Jeff_Hager, I missed your point. You may be right. Here I give an example of the coordinates resulting from the use of fake GPS: -6.237031,106.781155. It looks normal and has a pattern of 6 digits behind the dot. It seems that this is the result of data retrieval from Google Maps.
Compare with some other things I found, through experiments with several gadgets, the patterns are as follows through the use of the Glide location button:
- Android: -6.1665433,106.7171416; 7 digits behind the dot
- iMac: -6.1731628,106.7921713; 7 digits behind the dot
- iPhone: -6.173162863033643, 106.7921713949005; always 16 digits.
- Windows: Not yet tried.
- -6.20932,106.84695; Fake or not??
I think this is close to the solution. Testing is needed to make sure.