Question

Distinguish between a grid and an arbitrary grid system​

Answer 1

Explanation:

Any reference system developed for use where no grid is available or practical, or where military security for the reference is desired is termed as Arbitrary grid.

And

A grid is a network of evenly spaced horizontal and vertical lines used to identify locations on a map. ... You can also use grids to display measured locations using projected coordinates on any map.

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Answer 2

Answer:

On a map the network of parallels and meridians is called a grid, while the set of vertical and horizontal lines drawn in red is called the arbitrary grid system.