Surveying & Geomatics

Basic

Slope Between Contours

Ground slope from the contour interval and horizontal spacing on a map.

Formula

S = \frac{CI}{d} \times 100

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Variables

SSlope (%)

CIContour interval

dMap distance between contours

Example

CI=10 m, d=50 m: S = 20%

Did You Know?

Contour lines packed tightly together signal steep terrain — spread out means gentle ground.

surveying contour slope

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