GCJ-02火星坐标系、BD-09百度坐标系和WGS-84坐标系转换

WGS-84:GPS坐标系
GCJ-02:火星坐标系,国测局02年发布的坐标体系,高德,腾讯等使用。
BD-09:百度坐标系

GCJ-02火星坐标系和WGS-84坐标系转换关系

var pi = 3.14159265358979324
var a = 6378245.0
var ee = 0.00669342162296594323
const WGS84_To_GCJ02 = (wgLat,wgLon) => {
    var mars_point={lng:0,lat:0}
    var dLat = transformlat(wgLon - 105.0, wgLat - 35.0)
    var dLon = transformlng(wgLon - 105.0, wgLat - 35.0)
    var radLat = wgLat / 180.0 * pi
    var magic = Math.sin(radLat)
    magic = 1 - ee * magic * magic
    var sqrtMagic = Math.sqrt(magic)
    dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi)
    dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi)
    mars_point.lat = Number(wgLat) + Number(dLat)
    mars_point.lng = Number(wgLon) + Number(dLon)
    return mars_point
}

const transformlat = (x, y) => {
    var ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x))
    ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0
    ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0
    ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0
    return ret
}
const transformlng = (x, y) => {
    var ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x))
    ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0
    ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0
    ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0
    return ret
}

GCJ-02火星坐标转BD-09百度坐标

x_pi=3.14159265358979324 * 3000.0 / 180.0;
const marsTobaidu = (mars_point) => {
    var baidu_point={lon:0,lat:0};
    var x=mars_point.lon;
    var y=mars_point.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);
    baidu_point.lon = z * Math.cos(theta) + 0.0065;
    baidu_point.lat = z * Math.sin(theta) + 0.006;
    return baidu_point;
}

BD-09百度坐标转GCJ-02火星坐标

x_pi=3.14159265358979324 * 3000.0 / 180.0;
const baiduTomars = (baidu_point) => {
    var mars_point={lon:0,lat:0};
    var x=baidu_point.lon-0.0065;
    var y=baidu_point.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);
    mars_point.lon=z * Math.cos(theta);
    mars_point.lat=z * Math.sin(theta);
    return mars_point;
}

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