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What is Google map's spatial reference system using when you enter a lat, long into the maps search bar?
I've found hints that it might be WGS84 but after converting to that coordinate system, nothing shows up when i paste the coordinates into the google maps search box.
I am converting from GDA MGA 56.
Sample:
Spatial coord systems:
I am using geotools to do the transform:
CoordinateReferenceSystem crsMga56 = CRS.parseWKT(mga56);
CoordinateReferenceSystem crsGmaps = CRS.parseWKT(gmaps);
Coordinate coordinate = new Coordinate(336301, 6253363);
Point point = new GeometryFactory().createPoint(coordinate);
MathTransform transform = CRS.findMathTransform(crsMga56, crsGmaps);
Geometry geometry = JTS.transform(point, transform);
I know the transform is not correct, as when i use an online tool it gives me the correct coords. http://www.environment.gov.au/cgi-bin/transform/mga2geo_gda.pl?east=336301&north=6253363&zone=56
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(Google uses the World Geodetic System WGS84 standard.) World coordinates, which reference a point on the map uniquely.
Google Maps and Microsoft Virtual Earth use a Mercator projection based on the World Geodetic System (WGS) 1984 geographic coordinate system (datum).
For FM and LPFM radio stations, the FCC uses an older coordinate system called NAD27 whereas most coordinates including Google Maps coordinates, use the newer NAD83 system.
To use Google Maps position the map and, using the zoom tool on the left-hand side of the screen, zoom in to the maximum level to find the place for which you want a Grid Reference. Then either: Click "Grid Reference Tools" and choose "Get Grid Reference from Map".
Google uses a spherical mercator projection based on WGS84. There's a writeup on the OpenLayers website.
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