Question

Answer with reference to Representation of Geographical Features​

Answer 1

1. The Survey of India is the organization which developes toposheets of india
2. contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes

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