I have a city map of Moscow. We modified a Google Maps image with some artistic elements, but the relation between GPS coordinates and pixels remains the same.

**Problem:** How do I convert GPS coordinates from various data points we have into pixel coordinates in the image?

Ideally I can do this in Javascript, but PHP would be OK.

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I know that on small scales (for example on city scales) it to make simply enough (it is necessary to learn what geographic coordinates has one of picture corners, then to learn &quot;price&quot; of one pixel in geographic coordinates on a picture on axes OX and OY separately).

But on the big scales (country scale) &quot;price&quot; of one pixel will be not a constant, and will vary strongly enough and the method described above cannot be applied.

How to solve a problem on country scales?


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**Update:**

I do not use API Google Maps, I have only: geographic coordinates of the object (they are from google maps), I still have at my site a simple picture *. gif, in which I must draw a point corresponding geographic coordinates.

  [1]: http://img227.imageshack.us/img227/5169/map1.gif

All Google Static-Maps Solutions on Gang of Coders

Total of 1 Google Static-Maps Solutions

Convert long/lat to pixel x/y on a given picture