Google map api v3 projection?

Question

I would like to find out what projection is google map using is it EPSG:4326 or P900913 ? Also if you use the drawing tools what projection coordinates are generated?

Answer 1

EPSG3857 is the official designation.

Interactive web maps are using "Spherical Mercator" system which uses Mercator projection on
the sphere instead of WGS84 ellipsoid.

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