1.

Write notes on: a. Spot height b. Form lines c. Benchmark

Answer»

a. Spot height: Spot height represents the actual height of a place by recording the height in digits beside a black dot (•). 

b. Form lines: When it is difficult to measure the elevation of places through land surveys due to rugged terrain, the elevation is represented with the help of broken lines. These are form lines. 

c. Benchmark: The height of reservoirs and prominent buildings are recorded along with the letters BM.



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