You are looking for the dates on the gates
standing on the main road side and reading from the left gate to the right gate
Final Location
N 51 59.ABC
E 000 49.DEF
A=Sum of the 1st & 3rd digits
B=Sum of the 7th & 8th digits
C=Sum of the 4th,5th & 8th digits
D=2nd digit minus 4th digit
E=3rd digit plus 7th & 8th digits
F=Sum of 1st & 8th digits