地图坐标转换

/**
     * 坐标转换，腾讯地图转换成百度地图坐标
     * @param lat 腾讯纬度
     * @param lon 腾讯经度
     * @return 返回结果：经度,纬度
     */
    public static String map_tx2bd(double lat, double lon){
        double bd_lat;
        double bd_lon;
        double x_pi=3.14159265358979324;
        double x = lon, y = lat;
        double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
        double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
        bd_lon = z * Math.cos(theta) + 0.0065;
        bd_lat = z * Math.sin(theta) + 0.006;
        return bd_lon+","+bd_lat;
    }


    /**`在这里插入代码片`
     * 坐标转换，百度地图坐标转换成腾讯地图坐标
     * @param lat  百度坐标纬度
     * @param lon  百度坐标经度
     * @return 返回结果：纬度,经度
     */
    public static String map_bd2tx(double lat, double lon){
        double tx_lat;
        double tx_lon;
        double x_pi=3.14159265358979324;
        double x = lon - 0.0065, y = lat - 0.006;
        double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
        double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
        tx_lon = z * Math.cos(theta);
        tx_lat = z * Math.sin(theta);
        return tx_lat+","+tx_lon;
    }