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wat certain data will be needed in order to construct a topographic map of your area?

In order to construct a topographic map of your area you would have to collect certain data. What are these data and how would you use them to make a contour map? Please help me. I have no idea what the answer is. Thanks.

Public Comments

1. You would need to survey the elevation of every geologic feature in your area to make an accurate topographic map