Re: [Geotools-gt2-users] Coordinate Transform

[Jody G. <jga...@re...>]

Abraham Mármol Asís wrote:
> Hi all im new to geoTools and also to Geo-.... im only a simple web 
> programer that need to do single simple geo task
>
> I  want to convert a coordinate expressed in EPSG:23030 to a 
> GoogleMaps system coordeinates I need to know some things that i cant 
> find by myself over internet.
>
> 1) What coordinate reference system use google maps?
> I have read that could be this:
> http://www.spatialreference.org/ref/user/google-projection/ 
> <http://www.spatialreference.org/ref/user/google-projection/>
The mad GeoServer guys made up an EPSG code for the google projection 
... I think it is "EPSG:900913".  I am not sure where they put this 
definition however (probably in epsg extras or extention or something?).
>
> 2) Assuming that the GoogleMap's CRS is that ones, how can i implement 
> it in GeoTools.
> Im triying to do something like that:
>
> String wkt = "String copied from here 
> <http://http://www.spatialreference.org/ref/user/google-projection/ogcwkt/>";
> CoordinateReferenceSystem targetCRS = CRS.decode("EPSG:23030");
> CoordinateReferenceSystem googleCRS = CRS.parseWKT("EPSG:900913");
> MathTransform transform = CRS.findMathTransform(sourceCRS, googleCRS);
> Point p2 = (Point) point.transform(targetCRS);
Updated the above, cheers.
Jody