Converting Lat/Lon to Pixel-XY on cropped map?

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المشرف العام

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I have a GPX-Track containing LatLon coordinates based on WGS84. The track should be drawn on a cropped map, and for this, I need the pixel coordinates. The map tiles are from OSM

I'm not quite sure how to do this, but I figured out a way (without implementing it yet, since I don't have the formulars right now).


  1. Convert LatLon to Spherical Mercator which is used by OSM
  2. Linear transformation spherical mercator -> pixel coordinates. For step 2., 2 identical points are needed. I guess I can use the map's corner points.
Is there a better way to do this?



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