map = new AMap.Map('container', {

resizeEnable: true

});

map.plugin('AMap.Geolocation', function() {

geolocation = new AMap.Geolocation({

enableHighAccuracy: true,//是否使用高精度定位，默认:true

timeout: 10000,          //超过10秒后停止定位，默认：无穷大

buttonOffset: new AMap.Pixel(10, 20),//定位按钮与设置的停靠位置的偏移量，默认：Pixel(10, 20)

zoomToAccuracy: true,      //定位成功后调整地图视野范围使定位位置及精度范围视野内可见，默认：false

buttonPosition:'RB'

});

map.addControl(geolocation);

geolocation.getCurrentPosition();

AMap.event.addListener(geolocation, 'complete', onComplete);//返回定位信息

AMap.event.addListener(geolocation, 'error', onError);      //返回定位出错信息

});

//解析定位结果

function onComplete(data) {

var EndLatitude = document.getElementById("EndLatitude").value;

var EndLongitude = document.getElementById("EndLongitude").value;

var str=['定位成功'];

str.push('经度：' + data.position.getLng());

str.push('纬度：' + data.position.getLat());

var gpsPoint = GPS.gcj_encrypt(data.position.getLat(), data.position.getLng());

lng= gpsPoint.lon;

lat= gpsPoint.lat;

if(data.accuracy){

str.push('精度：' + data.accuracy + ' 米');

}//如为IP精确定位结果则没有精度信息

str.push('是否经过偏移：' + (data.isConverted ? '是' : '否'));

//var a = "http://api.map.baidu.com/direction?origin=latlng:" + position.coords.latitude + "," + position.coords.longitude + "|name:我的位置&destination=latlng:" + EndLatitude + "," + EndLongitude + "|name:目的地&mode=driving&region=成都&output=html&src=scnjw";

//var a = "http://api.map.baidu.com/direction?origin=latlng:31.64380,105.00065|name:去嘛&destination=latlng:30.64380,104.00065|name:来嘛&mode=driving&region=成都&output=html&src=scnjw";

//   var a = "http://uri.amap.com/navigation?from=" + position.coords.longitude + "," + position.coords.latitude + ",我的位置&to=" + EndLongitude + "," + EndLatitude + ",目的地&mode=car&policy=1&src=mypage&coordinate=gaode&callnative=0";

var a = "http://uri.amap.com/navigation?from=" +lng+","+lat + ",我的位置&to=" + EndLongitude + "," + EndLatitude + ",目的地&mode=car&policy=1&src=mypage&coordinate=gaode&callnative=0";

top.location = a;

}

//解析定位错误信息

function onError(data) {

document.getElementById('tip').innerHTML = '定位失败';

}

var GPS = {

PI: 3.14159265358979324,

x_pi: 3.14159265358979324 * 3000.0 / 180.0,

delta: function (lat, lon) {

var a = 6378245.0; //  a: 卫星椭球坐标投影到平面地图坐标系的投影因子。

var ee = 0.00669342162296594323; //  ee: 椭球的偏心率。

var dLat = this.transformLat(lon - 105.0, lat - 35.0);

var dLon = this.transformLon(lon - 105.0, lat - 35.0);

var radLat = lat / 180.0 * this.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) * this.PI);

dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * this.PI);

return {

'lat': dLat,

'lon': dLon

};

},

//WGS-84 to GCJ-02

gcj_encrypt: function (wgsLat, wgsLon) {

if (this.outOfChina(wgsLat, wgsLon))

return {

'lat': wgsLat,

'lon': wgsLon

};

var d = this.delta(wgsLat, wgsLon);

return {

'lat': wgsLat + d.lat,

'lon': wgsLon + d.lon

};

},

outOfChina: function (lat, lon) {

if (lon < 72.004 || lon > 137.8347)

return true;

if (lat < 0.8293 || lat > 55.8271)

return true;

return false;

},

transformLat: function (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 * this.PI) + 20.0 * Math.sin(2.0 * x * this.PI)) * 2.0 / 3.0;

ret += (20.0 * Math.sin(y * this.PI) + 40.0 * Math.sin(y / 3.0 * this.PI)) * 2.0 / 3.0;

ret += (160.0 * Math.sin(y / 12.0 * this.PI) + 320 * Math.sin(y * this.PI / 30.0)) * 2.0 / 3.0;

return ret;

},

transformLon: function (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 * this.PI) + 20.0 * Math.sin(2.0 * x * this.PI)) * 2.0 / 3.0;

ret += (20.0 * Math.sin(x * this.PI) + 40.0 * Math.sin(x / 3.0 * this.PI)) * 2.0 / 3.0;

ret += (150.0 * Math.sin(x / 12.0 * this.PI) + 300.0 * Math.sin(x / 30.0 * this.PI)) * 2.0 / 3.0;

return ret;

}

};

位置偏差 转换

var result = gcoord.transform(

[104.059303, 30.542873],    // 经纬度坐标

gcoord.WGS84,                 // 当前坐标系

gcoord.GCJ02                   // 目标坐标系

);

console.log( result );

gcoord官网

https://github.com/hujiulong/gcoord