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HORIZONTAL EQUIVALENT. The horizontal distance between any Another decision that must be made is the contour interval. The “best” interval depends on the use of the data. Contour Intervals--cont. Types of topo map. Nature 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.
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"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 … The contour interval is arbitrary but should be chosen so that the contour map shows enough contours to reveal the pattern clearly without being crowded with too many contour lines. Usually the contour values are nice, round numbers, including a standard reference value such as 0, 100, or 1000.
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Surveying MCQs Set-3 Negative contour intervals are not allowed. Smoother but less accurate contours can be obtained by preprocessing the input raster with a Focal Statistics operation with the MEAN option or the Filter tool with the LOW option. A base contour is used, for example, when you want to create contours every 15 meters, starting at 10 meters. The contour integral of a complex function f : C → C is a generalization of the integral for real-valued functions.
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Considering the size of the area to be mapped, contour intervals are assumed. What Is a Contour Interval? The best way to familiarize yourself with the concept of contour lines and contour intervals is to study the legend of the map, which tells you how far apart in vertical feet or meters adjacent contour lines are. Contour intervals tell you the change in elevation between any two contour lines. You can find the contour interval in the map key, usually located underneath the scale of the map at the bottom center. To understand all map symbols, see the US Gov document. Example: The contour interval is 50 feet according to the map key.
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Sketch the contour lines that represent each feature in the boxes to the right. (Note: Don’t forget to put hachure marks on the depression contour lines.) 2.
In this case, 10 is used for the base contour and 15 is the contour interval. The values to be contoured are 10, 25, 40, 55, and so on. Specifying a base contour does not prevent contours from being created above or below that value.
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A contour interval is a vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line.
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Start ArcGIS by clicking on Start → All A). B). C). D). 1. The topographic map below has a contour interval of 20 feet. Points A and B represent locations on.