GATE 2026 AR — Architecture – Question 15
On a topographic map, successive contour lines become more widely spaced uphill. What is the slope form?
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Correct answer: (B) Convex
Explanation
Wide contour spacing indicates gentle slope and close spacing indicates steep slope. Here the upper part is gentler than the lower part, producing the convex slope profile intended by the source. Thus B. Equal spacing would indicate a uniform slope; contour spacing must be read in the specified uphill direction.