Best data to work with GPS

Put Claude

Active Member
Licensed User

I wil reorganize my GPS application, so, I must choose now between UTM (regions UTM borders) or LAT_LON (ddd.ddddd more global) data for calculating all sort of things. At the moment I use UTM, but I was thinking to use LAT-LON data strait from the $GPRMC sentence...
Once started, I have to stick with it for the rest of the app. Is this the best choise for further development ???

Put Claude Belgium


Licensed User

I suggest to work with UTM, as long as the application has to deal with distances of less than 100 NM because the grid of UTM is rectangular so calculating distance or azimuth is straight-forward, while with spherical coordinates the algorithm for range or azimuth is complex.

If the application deals with larger distances - you must work with GEO