ocr: 100km 949596 97 9899 99 Each 100 kilometre grid square is subdivided 98 into smaller squares. There are 10,000 of these 97 smaller grid squares, which each cover an area 96 of1x1 kilometre. 95 3 They are defined on the map 94 U by grid lines, each line being identified by a A two-figure number. The grid lines are numbered from 00 to 99 in 05 -L an easterly (left to right) and 04 - northerly (upward) direction from the south-west 03 (bottom left) corner of each 100 kilometre grid 02 01 square. The easterly grid lines are known as 00! 000102030405 Eastings, and the northerly grid lines are known ...