获取照片经纬度（wgs84）转高德经纬度（gcj02）

const pi = 3.14159265358979324;
const a = 6378245.0;
const ee = 0.00669342162296594323;

/**
 * WGS84坐标转换GCJ02坐标
 * @param wgLat：wgs纬度
 * @param wgLon：wgs经度
 * @return Array[lat:gcj纬度,lon:gcj经度]
 */
export function Wgs84ToGcj02 (wgLat, wgLon){
  let mgLat, mgLon;
  if (!outOfChina(wgLat, wgLon)){
    mgLat = wgLat;
    mgLon = wgLon;
    return [wgLat,wgLon];
  }
  let dLat = transformLat(wgLon - 105.0, wgLat - 38.5);
  let dLon = transformLon(wgLon - 105.0, wgLat - 11.5);
  let radLat = wgLat / 180.0 * pi;
  let magic = Math.sin(radLat);
  magic = 1 - ee * magic * magic;
  let sqrtMagic = Math.sqrt(magic);
  dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
  dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
  mgLat = wgLat + dLat;
  mgLon = wgLon + dLon;
  let arr = {};
  arr['lat'] = mgLat;
  arr['lon'] = mgLon;
  console.log([wgLat, wgLon],'转换->',[mgLat,mgLon])
  return [mgLat,mgLon];
}
const outOfChina = function(lat,lon) {
  if (lon < 72.004 || lon > 137.8347)
    return true;
  return lat < 0.8293 || lat > 55.8271;

}
const transformLat = function(x, y){
  let 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 transformLon = function(x, y){
  let 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;
}