3 ms·
How is it related to GPS? Usually GPS devices return coordinates in WGS84 which will not be changed. They're just updating old maps which was based on their loc
by ungzd 10y ago
How is it related to GPS? Usually GPS devices return coordinates in WGS84 which will not be changed. They're just updating old maps which was based on their local datums?
- nraynaud 10y agothey are basically changing the official WGS84 coordinates of a number of famous Point Of Interest. The way they do it that they measure the position of some reference point in WGS84 on every tectonic plate, then they measure the relative position of a bunch of point of interest from the local reference point. At a regular interval, they re-measure the actual coordinates of the reference point in WGS84, and that automatically moves all of its dependent points of interest in WGS84. Tectonic plate movement is why WGS84 is not always the best way to store your points of interest, keeping them in the local reference also helps propagation when an update occurs.