tips :: google maps api

projection

17 November 2006

According to Google [official], they use a Mercator projection for their maps [both street and satellite]. Charlie Savage provides quite a bit more detail, though [unofficial]:

Datum—WGS84 [he' assuming this, he's never seen verification of it]
Projection—Mercator
Unit system—pixels [believe it or not]
Axes—standard east, non-standard south
Origin—Near the north pole on the international date line

via cfis

working with polygons

13 November 2006

while the xmaps library certainly promises a more robust solution than our preferred answer to dealing with polygons, we haven't been able to get it to work with version two of the api.

 

last update . 20061117