How it works
Identify terrain features on a map: this quiz lights one contour pattern at a time on an invented map, and you name it. All ten features of a map reading course are here, under a sketch of the same ground.
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Major features
A hill is a set of closed lines, one inside the other. A saddle is the hourglass between two hills. A valley and a ridge both bend the lines into a U or V: in a valley the closed end points upstream, on a ridge it points away from high ground. A depression is a closed line with ticks pointing in.
Minor features, cut and fill
A draw is a small valley and a spur a short ridge, so they bend the lines the same way on a smaller scale. At a cliff the lines run together. A cut and a fill are man-made: the ticks of a cut point to the roadbed, the ticks of a fill toward lower ground.
- Draw or spur? Find the high ground first. The V of a draw points toward it; the U of a spur points away from it.
Questions and answers
What are the 10 terrain features on a map?
Five major features (hill, saddle, valley, ridge, depression), three minor features (draw, spur, cliff) and two supplementary features (cut, fill).
What is the difference between a draw and a spur?
A draw is low ground: a small stream course where the ground rises on three sides. Its contour lines point toward high ground. A spur is high ground jutting out from a ridge, and its contour lines point away from high ground.
How can you tell a valley from a ridge on a contour map?
Both bend the contour lines into a U or V. In a valley the closed end points upstream, toward high ground. On a ridge it points away from high ground.
How is a depression different from a hill on a map?
Both are closed contour lines. The lines of a depression carry tick marks that point toward the low ground inside. The lines of a hill have none, and the ground rises toward the smallest one.