The image below shows how the map is broken into columns, rows, keypads, and subkeypads. To find your postion first find the column and row you are in then think of that grid as being broken up into nine squares like your keyboards keypad and think of each of those squares as being broken up into their own keypads. If for example you are in column H and row 4 sitting right in the exact middle you would be in the 5th keypad and if you were in the middle of that you would also be in the 5th subkeypad putting you in H455 or column H, row 4, keypad 5, subkeypad 5.
