等とう高こう線せん地ち図ず

noun

contour map

A map that uses contour lines to show elevation and land shape. Common in geography, hiking, and surveying contexts.

• 登と山ざんの前まえに等とう高こう線せん地ち図ずでルートを確かく認にんした。

  Before climbing, I checked the route on a contour map.