[josm-dev] Geometric calculations and projections

[Paul Johnson]

Tobias Wendorff wrote:

> 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?

Say you want to draw Whyoming...