Question

give two points of difference between Bench mark and spot height

Answer 1

A spot height is an exact point on a map with an elevation recorded beside it that represents its height above a given datum. ... Unlike a bench-mark, which is marked by a disc or plate, there is no official indication of a spot height on the ground although, in open country, spot heightsmay sometimes be marked by cairns.

Answer 2

Spot Height:-

• It is indicated on map and not on the ground.
• In a map it is represented by a dot followed by numerals representing height.
• It indicates height only above mean sea level.

Bench Marks :-

• It is indicated on real ground (a stone or building) which serves reference for surveyors.
• The place where Bench Mark is placed on real ground is represented as BM followed by a numeral.
• It indicates height of some point marked above the ground and includes the height of the point on which bench mark is etched.

Actually difference column wasn't available so I wrote in bullets.... The 1st point of Spot height has to be differentiated with the 1st point of Bench mark.....

Thank you ❤️❤️