public static void XYtoGL(Coordinate coordinate)
{
double R = 6378137;
coordinate.x = coordinate.x / Math.PI * 180.0 / R;
coordinate.y = ((Math.atan(Math.exp(coordinate.y / R)) - Math.PI/4) / Math.PI * 180.0)*2;
}
public static void GLtoXY(Coordinate coordinate)
{
double R = 6378137;
coordinate.x = R * (coordinate.x - 0)/180 * Math.PI;
coordinate.y = R * Math.log(Math.tan(Math.PI/4+coordinate.y/2*Math.PI/180));
}
Web Mercator Non-Conformal, Non-Mercator
原文：https://www.cnblogs.com/gispathfinder/p/9532848.html