Question

how are the co ordinates specified for or a grid location?​

Answer 1

Answer:

Using coordinates to specify a position in a grid is just like locating a point on a simple X-Y graph. On an X-Y graph, the first number in the coordinate refers to the position along the X-axis and the second number refers to the position along the Y-axis

Explanation:

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Answer 2

Answer:

A GPS unit commonly gives a ten-digit grid reference, based on two groups of five numbers for the Easting and Northing values. Each successive increase in precision (from 6 digit to 8 digit to 10 digit) pinpoints the location more precisely by a factor of 10.