Why are the contour lines in this figure equally spaced?
The contour lines in this figure are equally spaced. The even spacing indicates the hill has a uniform slope. From the contour map, a profile can be drawn of the terrain. Example 2 - Draw a profile showing the elevations of the contours.
What do concentric contour lines indicate?
Concentric contour lines indicate a peak (i.e. hill top). Concentric hachured Contour lines indicate a: Concentric hachured contour lines indicate a depression. Contour lines form a V when they cross a stream. The open part of the V faces the (upstream/downstream) direction?
What type of contour lines represent decreasing elevation?
Hachured contour lines represent decreasing elevation, such as a depression or crater. Rule of V Contour lines form a V when they cross a stream. The stream flows from the apex of the
Why do contour lines form a V when they cross?
Contour lines form a V when they cross a stream. The stream flows from the apex of the V toward the open end Two different contour lines cannot cross each other because: . . . each represents a different elevation, and any point where they cross would have to be
What is contour line?
A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line.#N#If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing. If the numbers associated with the contour lines are decreasing, there is a decrease in elevation. As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. They then cross the stream and turn back along the opposite bank of the stream forming a "v". A rounded contour indicates a flatter or wider drainage or spur. Contour lines tend to enclose the smallest areas on ridge tops, which are often narrow or very limited in spatial extent. Sharp contour points indicate pointed ridges.#N#Example 1 - In the graphic below, what is the vertical distance between the contour lines?#N#Pick two contour lines that are next to each other and find the difference in associated numbers.#N#40 feet - 20 feet = 20 feet#N#The contour lines in this figure are equally spaced. The even spacing indicates the hill has a uniform slope. From the contour map, a profile can be drawn of the terrain.#N#Example 2 - Draw a profile showing the elevations of the contours.#N#Note: The intervals are increasing, therefore, the contours indicate a hill. The peak is normally considered to be located at half the interval distance.#N#Widely separated contour lines indicate a gentle slope. Contour lines that are very close together indicate a steep slope.#N#The figure above illustrates various topographic features. (b) Notice how a mountain saddle, a ridge, a stream, a steep area, and a flat area are shown with contour lines.#N#The figure above illustrates a depression and its representation using contour lines. Notice the tick marks pointing toward lower elevation.
What does a rounded contour mean?
A rounded contour indicates a flatter or wider drainage or spur. Contour lines tend to enclose the smallest areas on ridge tops, which are often narrow or very limited in spatial extent. Sharp contour points indicate pointed ridges.
What happens when contour lines decrease?
If the numbers associated with the contour lines are decreasing, there is a decrease in elevation. As a contour approaches a stream, canyon, or drainage area, the contour lines turn upstream. They then cross the stream and turn back along the opposite bank of the stream forming a "v".
