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Discover LudwigThe phrase "contour interval" is correct and usable in written English.
It is typically used in the context of topographic maps to refer to the vertical distance between contour lines.
Example: "The contour interval on this map is 10 meters, which helps to indicate the elevation changes in the terrain."
Alternatives: "elevation interval" or "contour spacing."
Dictionary
contour interval
noun
The difference in elevation represented by the space between adjacent contour lines
Exact(60)
Contour interval 100 feet.
contour interval and spot heights.
contour interval, shading and spot heights.
Relief shown by 10 feet contour interval and spot heights.
Relief shown by 20 m. contour interval and spot heights.
Relief shown by 20 ft contour interval and spot heights.
Relief shown by 20 feet contour interval and spot heights.
Relief shown by f328 ft. contour interval spot heights.
Relief shown by 10 ft. contour interval and spot heights.
Relief shown by 10 meter contour interval and spot elevations.
Relief shown by 10 m contour interval and spot heights.
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