static void TestRadian()
{
CW(DataExtensions.LatLonToRadian(-180).ToString());
CW(DataExtensions.LatLonToRadian(-170).ToString());
CW(DataExtensions.LatLonToRadian(10).ToString());
CW(DataExtensions.LatLonToRadian(180).ToString());
CW(DataExtensions.LatLonToRadian(0).ToString());
}