**How to find contour interval? To find contour interval divide the difference in elevation between the index lines by the number of contour lines from one index line to the next. For example, if the distance 200 is divided by the number of lines, where the number of lines is 5.**

## How to Find a Contour Interval?

Finding a contour interval can be a tricky but necessary task for both amateur and professional cartographers. Whether you’re creating a topographic map for a school project or for a professional survey, understanding how to find a contour interval is essential for accurately representing the terrain.

So, what is a contour interval? Contour intervals are the vertical distance between two adjacent contour lines on a topographic map.

This helps the map reader understand the elevation of the terrain represented in the map. The contour interval is usually represented as feet or meters, and is the same for all contours on the map.

The first step to finding a contour interval is to locate two adjacent contour lines. These lines should be close to each other, but should not intersect.

Once you’ve identified two adjacent contour lines, measure the vertical distance between them. This distance is the contour interval.

Another way to find a contour interval is to use the map’s legend. The legend of a topographic map will typically include the contour interval for the map. This is usually represented near the scale bar, either in feet or meters. For example, a contour interval of 10 feet means

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