* Location: Trewithian lat=50.192936 - lon=-4.975287  iy=1207  ix=1999
540000.000000,0.055133,0.000000,0.055133
543600.000000,0.063878,0.000000,0.063878
547200.000000,0.074602,0.000000,0.074602
550800.000000,0.087798,0.000000,0.087798
550800.000000,0.087798,0.000000,0.087798
