[OSM-dev] Mapnik projection slightly wrong?

[Lauri Hahne]

2008/9/23 Thomas Wood <grand.edgemaster at gmail.com>:
> For webmap rendering we use the spherical mercator projection, which
> assumes the earth is spherical. Although it's not particularly
> accurate, the maps are good enough. I believe the spherical earth is
> assumed since it simplifies client-side calculations considerably.

Well, Google and everybody else use the assumption of a spherical
earth. As long as we do the same, the OSM tiles are a drop-in
replacement for other tiles.

-- 
Lauri Hahne