## What do contour lines on a map represent?

Contour line, a line on a map representing an imaginary line on the land surface, all points of which are at the same elevation above a datum plane, usually mean sea level. The diagram illustrates how contour lines show relief by joining points of equal elevation.

## Why are contour lines important on a map?

These contour lines are an important way of showing the rise and fall of the land on a map. Contour lines show all the places that are the same height above sea level. They also tell us about the slope of the land. On a more gentle slope, they are farther apart.

## What are the basic features of contour lines?

• Contour lines must close, not necessarily in the limits of the plan.
• Widely spaced contour indicates flat surface.
• Closely spaced contour indicates steep ground.
• Equally spaced contour indicates uniform slope.
• Irregular contours indicate uneven surface.

## What are the types of contour lines in art?

There are several different types of contour line drawings:

• Blind Contour. ‘Blind contour drawing’ is when contour drawing is done without looking at the paper AT ALL.
• Continuous Line Contour.
• Modified Contour.
• cross-contour.

## What is an example of contour lines?

In cartography, a contour line (often just called a “contour”) joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

## What do contour lines look like on a topographical map?

Use caution, however – some cliffs may not appear on the map. If your contour interval was 50 feet, a cliff of 40 feet might not appear on the map, since the elevation doesn’t change enough to warrant a new contour line. D. Valley. When contour lines cross a valley or a stream, they make a sharp pointed V or U-shape.

## How does a contour line work in real life?

If you trace the length of a line with your finger, each point you touch is the same height above sea level. If you were to walk the path of a contour line in real life, you would remain at the same elevation the whole hike, never traveling up or down.

## What do the supplementary lines on a topographical map mean?

Supplementary lines appear as dotted lines, indicating flatter terrain. If you’re looking at an index line, it’s easy to read the elevation because it is clearly labeled. However, interval lines are somewhat trickier. To determine their elevation, you’ll need to know the contour intervals.

## Do you know the difference between interval and contour lines?

If you’re looking at an index line, it’s easy to read the elevation because it is clearly labeled. However, interval lines are somewhat trickier. To determine their elevation, you’ll need to know the contour intervals. Contour intervals tell you the change in elevation between any two contour lines.