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Message from discussion What type of map projection does Google use for Google Maps
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Bret Taylor  
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 More options Jul 1 2005, 6:49 pm
From: Bret Taylor <btay...@google.com>
Date: Fri, 1 Jul 2005 15:49:38 -0700
Local: Fri, Jul 1 2005 6:49 pm
Subject: Re: What type of map projection does Google use for Google Maps
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We use the Mercator projection for our maps. Wolfram MathWorld has a good
page on the projection (and a bunch of other map projections):

http://mathworld.wolfram.com/MercatorProjection.html

Bret

On 7/1/05, rls03 <rob.sh...@gmail.com> wrote:

> Thanks for the prompt reply. I guess what I want to know is whether or
> not Google Maps uses a UTM projection, Mercator projection, or some
> other projection for its maps.

> Bologna wrote:
> > The map projection differs between map types. You can translate the
> > geographic coordinates into screen coordinates using undocumented
> > functions in the map type objects, like this:

> > // screenCoords is a GPoint object
> > screenCoords = map.getCurrentMapType().getBitmapCoordinate(point.x,
> > point.y, map.getZoomLevel());

> > HTH.


 
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