x = 4.226182617407E-5 y = -9.0630778703665E-5
gc = 51.502686111111, 3.6157972222222 gcx = 3.6157972222222 gcy =
3.6158394840484, -9.0630778703665E-5
51° 30' 9", 3° 36' 57"