[josm-dev] Geometric calculations and projections

[Tobias Wendorff]

Matthew W. S. Bell schrieb:
> I think the key point here that the projection used for geometry editing
> should be a conformal[1] one (i.e., angle preserving) like those in [2].
> Possibly, the projection should have an even greater restriction.

Conformal for what distance? It's easy to do some accurate calculations
up to 1 km, but > 10 km or even > 100 is much more difficult, BUT: who
draws such big rectangles and circels in OSM?