地图坐标转换

//高德、谷歌转百度 locs[0]:lat  locs[1]:lng 
function gd_bd(lng, lat) {
    var x =lng, y =lat;
    var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
    var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
     locs.push( z * Math.cos(theta) + 0.0065);
    locs.push( z * Math.sin(theta) + 0.006);
   return locs;
}



//百度转谷歌 百度转火星坐标 locs[0]:lat  locs[1]:lng  
function bd_gg(lng, lat) {
    var x = lng - 0.0065, y = lat - 0.006;
    var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
    var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
    var locs = [];
    locs.push(z * Math.sin(theta));
    locs.push(z * Math.cos(theta));
    return locs;
}