transform static method

YimLocationData transform(
  1. double lat,
  2. double lon
)

Implementation

static YimLocationData transform(double lat, double lon) {
  if (outOfChina(lat, lon)) return YimLocationData.init(lat, lon);
  double dLat = transformLat(lon - 105.0, lat - 35.0);
  double dLon = transformLon(lon - 105.0, lat - 35.0);
  double radLat = lat / 180.0 * pi;
  double magic = sin(radLat);
  magic = 1 - _ee * magic * magic;
  double sqrtMagic = sqrt(magic);
  dLat = (dLat * 180.0) / ((_a * (1 - _ee)) / (magic * sqrtMagic) * pi);
  dLon = (dLon * 180.0) / (_a / sqrtMagic * cos(radLat) * pi);
  double mgLat = lat + dLat;
  double mgLon = lon + dLon;
  return YimLocationData.init(mgLat, mgLon);
}