Calculating Contour Intervals and Elevations

This video tutorial explains how to calculate the contour interval on a topographic map when it is not provided. It guides viewers through finding two given elevations, subtracting them to find the elevation difference, counting the spaces between contour lines, and dividing the elevation difference by the number of spaces to determine the contour interval.

What is the main purpose of this video tutorial?

• To show how to measure distances on a map.

• To describe the history of topographic maps.

• To explain how to calculate contour intervals when not provided.

• To teach how to draw topographic maps.

What is a contour interval?

• The change in elevation between two contour lines.

• The distance between two points on a map.

• The total elevation of a mountain.

• The width of a contour line.

What is the first step in calculating the contour interval?

• Measure the distance between two points.

• Count the number of contour lines.

• Find and subtract the given elevations.

• Add the elevations of two points.

If the given elevations are 200 meters and 40 meters, what is the difference in elevation?

• 140 meters

• 100 meters

• 180 meters

• 160 meters

Where do you find the given elevations on a topographic map?

• In the map's title.

• In the map's scale.

• On the map's legend.

• On the thick index contour lines.

How many contour line jumps are there between the given elevations in the example?

• Two

• Four

• Five

• Three

What is the next step after finding the elevation difference?

• Multiply the elevations.

• Count the number of contour line jumps.

• Add the number of contour lines.

• Subtract the number of contour lines.

What is the formula to calculate the contour interval?

• Elevation difference plus the number of jumps.

• Elevation difference minus the number of jumps.

• Elevation difference divided by the number of jumps.

• Elevation difference multiplied by the number of jumps.

If the elevation difference is 160 meters and there are 4 jumps, what is the contour interval?

• 30 meters

• 50 meters

• 40 meters

• 20 meters

What does a contour interval of 40 meters mean?

• The map is 40 meters wide.

• Each jump between contour lines is 40 meters in elevation.

• The map is 40 meters long.

• Each contour line represents a 40-meter distance.