Transform lat, lng into x, y

Question

I have coordinate system with x and y. Also I need to show there x,y point but I have coordinates latitude, longitude.

How can I transform latitude, longitude into x,y to show on x,y scale?

Answer 1

Try this :

import com.vividsolutions.jts.geom.Coordinate;
import javax.measure.unit.NonSI;
import org.jscience.geography.coordinates.LatLong;
import org.jscience.geography.coordinates.UTM;
import org.jscience.geography.coordinates.crs.ReferenceEllipsoid;

This method makes the conversion in JAVA and return a Coordinate. Is easy to obtain X and Y from Coordinate

public static Coordinate Polar2UTM(double latitude, double longitude) {

    LatLong latlong = LatLong.valueOf(latitude, longitude, NonSI.DEGREE_ANGLE);

    UTM utm = UTM.latLongToUtm(latlong, ReferenceEllipsoid.WGS84);

    double cX = utm.getCoordinates()[0];
    double cY = utm.getCoordinates()[1];

    Coordinate coordenadas = new Coordinate(cX, cY);


}

Answer 2

If you are trying to convert (x, y) to/from (latitude and longitude)

Have a look at the various code implementations on this page.

https://wiki.openstreetmap.org/wiki/Mercator

Here are two JavaScript function examples...

mercator; //output mercator.x, mercator.y
latlon; //output latlon.lat, latlon.lon

You will need to have the measurements for your map.