What shape do contour lines display to indicate a fill?

Contour lines that indicate a fill on a map demonstrate lines extending with tick marks pointing toward lower ground. This style signifies that soil or material has been added to a specific area, which typically creates a higher elevation on the map where the fill is located, while the tick marks indicate the downhill direction.

When interpreting contour lines, understanding the direction these features point is essential. The tick marks, specifically, illustrate where the ground is sloped downwards. This visual representation assists land navigators and planners in determining the topography of an area, which is crucial for activities such as construction, landscaping, and outdoor activities.

The other shapes typically serve different purposes on a map. For instance, circles with arrows often represent either a depression or a crater-like formation, straight lines can represent boundary lines, and wavy lines may indicate water courses or other natural features. Thus, recognizing the correct representation of contour lines for fill is vital for effective land navigation and understanding the terrain.