It doesn't seem to be documented but I would assume they are using
WGS-84. GeoPoints are as a lon/lat coordinate so that rules out usage of
projected grid coordinates. The correct definition of the 'google
projection' can be found in epsg:3857. That essentially says to project
WGS84 ellipsoid lon/lat coordinates using the spherical variant of the
mercator projection. Given that definition it seems logical to me that
they would interpret lon/lat coordinates wrt WGS84 to avoid datum
transformations.
So in short, I think it's safe to assume that all lon/lat coordinates
that you get from/pass to the maps api should be interpreted wrt the
WGS84 datum.
Pepijn
On 05/05/2011 21:18, Julian wrote:
Anyone?
2009/11/25 Mathias <[email protected]
<mailto:[email protected]>>
Hi,
which Spatial Reference System is used by the Google Maps API and in
which Reference System are the GPS coordinates to be received by a
LocationProvider?
I only can assume that the Location Services use WGS84, or EPSG:4326.
But what if I use GeoPoint? Will it require WGS84 or the Google Maps
Projection (some kind of traverse mercator projection EPSG:90913). And
what reference do the Projection.fromPixels(..) and
Projection.toPixels
(..) methods require?
I ask because I want to display some GeoData to an Overlay and I have
to decide in which reference system I have to request it from my
Services.
Kind regards
Mathias
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