[OSM-dev] Projection code
Immanuel Scholz
immanuel.scholz at gmx.de
Fri Apr 28 21:31:20 BST 2006
Hi,
> Can someone point me to the code to project (lat, lon) to (x,y)
> please? I've had a look around on the svn, but can't download it here
> to search.
>From Wikipedia:
x = lon*PI/180,
y = log(tan(PI/4+lat*PI/360)))
the other way round:
lat = atan(sinh(y))*180/PI,
lon = x*180/PI;
(for a java implementation, see
http://www.eigenheimstrasse.de/svn/josm/src/org/openstreetmap/josm/data/projection/Mercator.java)
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