wgs84togcj02 static method
Implementation
static Coords wgs84togcj02(Coords coords) {
if (isOutOfChina(coords)) return coords;
double dlat =
_transformLat(Coords(coords.latitude - 35.0, coords.longitude - 105.0));
double dlng =
_transformLng(Coords(coords.latitude - 35.0, coords.longitude - 105.0));
final double radlat = coords.latitude / 180.0 * pi;
double magic = sin(radlat);
magic = 1 - _ee * magic * magic;
final double sqrtmagic = sqrt(magic);
dlat = (dlat * 180.0) / ((_a * (1 - _ee)) / (magic * sqrtmagic) * pi);
dlng = (dlng * 180.0) / (_a / sqrtmagic * cos(radlat) * pi);
final double mglat = coords.latitude + dlat;
final double mglng = coords.longitude + dlng;
return Coords(mglat, mglng);
}