Define grid square.
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The eastings and the northings intersect to form a network of squares called the arbitrary grid system. Each square in the arbitrary grid system is called the grid square.
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The 4° x 4° sheets are also called …………… sheets.
45 D/10 is an example of (quarter/quadrant) sheet.
Why are the grid lines numbered?
How much is the contour interval on a topo sheet?