compare the difference Map and find their height
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Spot height is the height of a particular point or altitude on the ground. It is generally found on maps which shows the height of a particular hill or Mountain. It is measured from mean sea level.
On the other hand, a benchmark is a standard or a point of reference. With the benchmark, things may be compared. It is generally marked in stone. It is used as a reference point on a survey as it's expected elevation and position are known.
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