Hello, "Robert (Jamie) Munro" <[EMAIL PROTECTED]> writes:
> I don't understand. Why was it necessary? According to the original poster, it improves the mapping by some 50 meters for some points, compared to projections made by a dedicated software (proj4). But I suppose all of this is quite subjective to the kind of projection you are using and your purpose. And I'm certainly not a cartographer. :-) > AFAICS, taking into account the variation of radius is *not* necessary, > but can be done if you want to make the maths much harder for yourself. The maths are not so difficult for Mercator projection but I agree are more involved for other calculations. I have personally considered the Earth a sphere when computing the distance between two points. Sincerely yours, david -- GPG/PGP key: A3AD7A2A David MENTRE <[EMAIL PROTECTED]> 5996 CC46 4612 9CA4 3562 D7AC 6C67 9E96 A3AD 7A2A _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev
