//bd09转Gcj02坐标系(百度坐标系转火星坐标系，纬度，经度)

Gpsbd09_To_Gcj02: function (bd_lat, bd_lon) {

var x = bd_lon - 0.0065, y = bd_lat - 0.006;

var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * Math.PI);

var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * Math.PI);

var gg_lon = z * Math.cos(theta);

var gg_lat = z * Math.sin(theta);

return { gg_lat, gg_lon };

},

//Gcj02转bd09坐标系(火星坐标系转百度坐标系,经度，纬度)

gcj02tobd09: function (lng, lat) {

var x_PI = 3.14159265358979324 * 3000.0 / 180.0;

var PI = 3.1415926535897932384626;

var a = 6378245.0;

var ee = 0.00669342162296594323;

var z = Math.sqrt(lng * lng + lat * lat) + 0.00002 * Math.sin(lat * x_PI);

var theta = Math.atan2(lat, lng) + 0.000003 * Math.cos(lng * x_PI);

var bd_lng = z * Math.cos(theta) + 0.0065;

var bd_lat = z * Math.sin(theta) + 0.006;

return [bd_lng, bd_lat]

},

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