« laugh » No kidding…
Couple of points. * It’s not trigonometry. The inverse of a proper ellipsoidal Mercator has no closed-form solution. * Data generally are in geographic coordinates, not map coordinates. If your data are in map…
It depends on the extent of the map. For local areas, what you suggest is just fine. At the scale of a continent, it’s problematic, and gets more and more problematic as you zoom out.
« laugh » No kidding…
Couple of points. * It’s not trigonometry. The inverse of a proper ellipsoidal Mercator has no closed-form solution. * Data generally are in geographic coordinates, not map coordinates. If your data are in map…
It depends on the extent of the map. For local areas, what you suggest is just fine. At the scale of a continent, it’s problematic, and gets more and more problematic as you zoom out.