2010/1/9 Dave F. <dave...@madasafish.com>: > I'm aware of the concept that the earth is not flat.
No but map projections are... > But... This is a two dimensional map. IFAIK there is no 3d data. The PoV > of viewing the OSM data via the likes of Mapnik is always through the > surface of the earth to the centre of the earth. Therefore a line such > as this Oz highway is, when viewed in a map, going to be straight. Not when you plot it on a map tile, mercator projections turn the earth flat, and when you make a curved surface flat, straight lines become curved. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
