Java, convert lat/lon to UTM [closed]

Answer 1

The transformation of a coordinate can actually be done in only a few lines of code:

Coordinate coordinate = new Coordinate(x, y);
MathTransform transform = CRS.findMathTransform(CRS.decode("EPSG:4326"), CRS.decode("EPSG:3857"), false);
JTS.transform(coordinate, coordinate, transform); 

This will transform a longitude/latitude coordinate (EPSG:4326) into Web Mercator projection (EPSG:3857) coordinate.

You just need to depend on the following two GeoTools libraries in your build tool (e.g. maven):

    
        osgeo
        Open Source Geospatial Foundation Repository
        http://download.osgeo.org/webdav/geotools/
    



    
        org.geotools
        gt-api
        ${geotools.version}
    
    
        org.geotools
        gt-epsg-hsql
        ${geotools.version}
    

This answer builds on a question/reply on gis.stackexchange.com. Posted my reply because the current answers here seem to be quite verbose.