What shape do contour lines form to indicate a spur?

Contour lines form a U or V shape pointing away from high ground to indicate a spur. This shape visually represents a landform that extends outward from a slope, showcasing the elevation change as it connects lower and higher terrain. In topographic maps, the contour lines provide critical information about the shape and slope of the land, and when they curve outward away from a higher elevation, it signifies a spur.

Understanding this characteristic of contour lines is essential for land navigation, as it helps map readers identify geographical features, such as spurs, valleys, and ridges. The U or V shape is distinctive and is indicative of the land’s relief, allowing navigators to plan their route effectively.

Other shapes, like wavy lines or closed circles, represent different topographical features, such as streams or hills, and parallel lines typically indicate a uniform slope but do not communicate the specifics of a spur. Recognizing the U or V contour lines is crucial for effective navigation and terrain analysis.