Helper.java 文件源码

public static Point2D latLongToPixel(final Dimension2D MAP_DIMENSION,
                                     final Point2D UPPER_LEFT,
                                     final Point2D LOWER_RIGHT,
                                     final Point2D LOCATION) {
    final double LATITUDE   = LOCATION.getX();
    final double LONGITUDE  = LOCATION.getY();
    final double MAP_WIDTH  = MAP_DIMENSION.getWidth();
    final double MAP_HEIGHT = MAP_DIMENSION.getHeight();

    final double WORLD_MAP_WIDTH = ((MAP_WIDTH / (LOWER_RIGHT.getY() - UPPER_LEFT.getY())) * 360) / (2 * Math.PI);
    final double MAP_OFFSET_Y    = (WORLD_MAP_WIDTH / 2 * Math.log10((1 + Math.sin(Math.toRadians(LOWER_RIGHT.getX()))) / (1 - Math.sin(Math.toRadians(LOWER_RIGHT.getX())))));

    final double X = (LONGITUDE - UPPER_LEFT.getY()) * (MAP_WIDTH / (LOWER_RIGHT.getY() - UPPER_LEFT.getY()));
    final double Y = MAP_HEIGHT - ((WORLD_MAP_WIDTH / 2 * Math.log10((1 + Math.sin(Math.toRadians(LATITUDE))) / (1 - Math.sin(Math.toRadians(LATITUDE))))) - MAP_OFFSET_Y);

    return new Point2D(X, Y);
}