經度到畫素X值

public static double lngToPixel(double lng, int zoom) {

return (lng + 180) * (256  * 2^zoom) / 360;

}

畫素X到經度

public static double pixelToLng(double pixelX, int zoom) {

return pixelX * 360 / (256 *  2^ zoom) - 180;

}

緯度到畫素Y

public static double latToPixel(double lat, int zoom) {

double siny = Math.sin(lat * Math.PI / 180);

double y = Math.log((1 + siny) / (1 - siny));

return (128 * z^ zoom) * (1 - y / (2 * Math.PI));

}

畫素Y到緯度

public static double pixelToLat(double pixelY, int zoom) {

double y = 2 * Math.PI * (1 - pixelY / (128  * z ^  zoom));

double z = Math.pow(Math.E, y);

double siny = (z - 1) / (z + 1);

return Math.asin(siny) * 180 / Math.PI;

}