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sciencing.com/calculate-contour-intervals-5344928.html

In the example above, the distance, 200, is divided by the number of lines, 5. The contour interval equals 200 ÷ 5 = 40, or 40-foot contour intervals. If, on the other hand, the elevation difference between index lines had been 100 feet, the contour interval would be 100 ÷ 5 = 20, or a 20-foot contour interval.

faculty.chemeketa.edu/afrank1/topo_maps/contour_interval.htm

Determining Contour Intervals : Contour lines can be drawn for any elevation, but to simplify things, only lines for certain elevations are drawn on a topographic map. These elevations are chosen to be evenly spaced vertically. This vertical spacing is referred to as the contour interval.

theconstructor.org/surveying/contour-interval-calculations-uses/16247

A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map. Usually there are different contour intervals for the different maps. Considering the size of the area to be mapped, contour intervals are assumed. In ...

en.wikipedia.org/wiki/Contour_interval

"Contour line" is the most common usage in cartography, but isobath for underwater depths on bathymetric maps and isohypse for elevations are also used. In cartography, the contour interval is the elevation difference between adjacent contour lines. The contour interval should be the same over a single map.

www.wordhippo.com/what-is/sentences-with-the-word/contour_interval.html

Looking for sentences with "contour interval"? Here are some examples. Sentence Examples. The contour interval of a contour map is the difference in elevation between successive contour lines. In cartography, the contour interval is the elevation difference between adjacent contour lines.

If you are decreasing elevation, subtract the contour interval from the nearest index contour line. f. Determine the elevation to a hilltop point (c). Add one-half the contour interval to the elevation of the last contour line. In this example, the last contour line before the hilltop is an index contour line numbered 600.

www.dictionary.com/browse/contour-interval

contour interval. noun. the difference in elevation represented by each contour line on a topographic map. RELATED CONTENT. Continually vs. Continuously Today we’re going to explore the meanings and uses of the adverbs continually and continuously. These terms, along with their adjective forms continual and continuous, are often used ...

www.nwcg.gov/course/ffm/mapping/55-contour-lines-and-intervals

Example 2 - Draw a profile showing the elevations of the contours. Note: The intervals are increasing, therefore, the contours indicate a hill. The peak is normally considered to be located at half the interval distance. Widely separated contour lines indicate a gentle slope. Contour lines that are very close together indicate a steep slope.

www.reference.com/geography/contour-interval-topographical-map-ef04410bcc783cc7

The space between contour lines on a topographical map is a contour interval. The contour interval is an even space that represents an increase in elevation. For instance, if the map uses a 20-foot interval, there are contour lines at zero, 20, 40, 60, 80 and 100 feet.