contour interval

American  

noun

1. the difference in elevation represented by each contour line on a topographic map.

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contour interval British  

noun

1. the difference in altitude represented by the space between two contour lines on a map

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Example Sentences

Contour interval below the 600-foot curve, 3,000 feet.

From Project Gutenberg

It is, however, of great importance for one to be able to determine at a glance, within about one contour interval, whether or not such and such a point is visible; or whether a given road is generally visible to a certain scout, etc.

From Project Gutenberg

The distance between the planes is called the contour interval.

From Project Gutenberg

The numbering shows at once the height of any point on a given contour and in addition shows the contour interval—in this case 20 feet.

From Project Gutenberg

The map seems to show more local relief to this terrace than the general view indicates, but it should be borne in mind that the contour interval is but 2½ feet.

From Project Gutenberg