Monday, Dec 20, 2010 at 21:54
Been thinking how to explain this better.
Consider the
grid on the old Hema map to be a Excel Spread sheet.
The columns are numbered from 1 to 21.
Column 2 for example has the UTM co ord 430000 on the left line and co ord 440000 on the right line. Then the adjoining column 3 has its left line co ord 440000 and its right line co ord 450000.
The rows are labelled from A through to R.
Row B for example has the UTM co ord 5960000 as its top line and 5950000 as its bottom line. This bottom line then becomes the top line of Row C, which then has a bottom line of 5940000
Column 1 and 21 are only part columns, just as Rows A and R are only part rows on this particular map. Off course on the new East and West maps these are probably “full” rows and columns.
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