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what is good way to draw contour lines to make topo map ?
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Answer #1

-> first, fix the contour interval, here all elevations in the range from 769 to 771, so, if we take contour interval 1 we get only one line, i.e., 769, 770, 771 contour lines so, consider contour interval 0.5 it gives 769, 769.5, 770, 770.5, 771 lines.

-> Next, in between of every two adjacent nodes on grid lines mark above contour interval elevation points using interpolation based on node elevations.

-> Now, join same elevation lines as no two contour interval lines meet or intersect.

768 68 nO 61 기자 16 769·S 1o -11의 16a.S 16aS 169.6 110 77S 110 6% T1D

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