Latitude 53°20'38.82"N
Longitude 6°16'2.98"W
You use the 53° and the 6°, then, take the second pair of digits, which are minutes, so you have to divide them by 60 (20/60, 16/60), then, the seconds by 3600 (38.82/3600, 2.98/3600)... then you put the numbers together and presto, you have your data converted to decimal to input on landmarks.