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Answer:
To see land elevation or underground elevation.
Step-by-step explanation:
You can use it to know what it under the ground before digging if you need a space to construct a building or parking. Or perhaps, even when building a house.
Topography: In simple terms arrangements of the a various in a more systematic order to provide more authentic and real information or set of data to each individual about the certain place, which may be Urban or rural areas etc.