WGS84 to EPSG::3785 – Converting Coordinates Using GeoTools and Java

coordinate systemepsggeotoolsjavawgs84

Could you please point me out where can I make such a transformation:

Convert WGS84 (EPSG::4326) coordinate to Google Map coordinate system (EPSG::3785), and vice versa.

Best Answer

with the help of http://docs.geotools.org/latest/userguide/library/api/jts.html I was able to do needed convertation.

Related Solutions

[GIS] Transform from WGS84 to EPSG 3785 (google maps)

UTM has nothing to do with EPSG 3785 and Google maps, apart from the WGS84 ellipsoid and datum. And WGS84 in degrees is yet another coordinate system.

If your desired point of the earth has negative lat/lon in degrees, the Google mercator coordinates are negative as well.

If you have UTM coordinates, they are always positive, but you need the UTM zone they are laying in. For the southern hemisphere, positive y counts from the south pole, for the northern hemisphere from the equator.

You can find formulas for UTM here: http://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system

Your zone might be UTM 30S.

[GIS] GeoTools and PostGIS with ESPG:3857

Always be aware of the axis order. PostGIS always uses the axis order: longitude (x), latitude (y).

-- Somewhere in Chicago, USA
SELECT ST_AsText(ST_Transform(ST_SetSRID(ST_Point(-87.642970, 41.937832), 4326), 3857));
-- POINT(-9756370.79201015 5151671.52336743)

-- Somewhere in Antarctica
SELECT ST_AsText(ST_Transform(ST_SetSRID(ST_Point(41.937832, -87.642970), 4326), 3857));
-- POINT(4668498.10321386 -24771604.6229288)

Best Answer

Related Solutions

[GIS] Transform from WGS84 to EPSG 3785 (google maps)

[GIS] GeoTools and PostGIS with ESPG:3857

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