![]() There are 3 types of contour lines on a map. In recent edition maps, the contour interval is given in meters instead of feet. When supplementary contours are used, the interval is indicated. carrying contour contour contour line elevation index contour. It states the vertical distance between adjacent contour lines of the map. cartography The difference in elevation between adjacent contour lines. What are the different types of contour lines? Note Contour Interval (12) The contour interval note is found in the center of thelower margin normally below the bar scales. To ascertain the profile of the ground surface in any direction.Ĥ. To find the economical route of communication between two places.Ĩ. We can find the difference in the height of any two points.ħ. The contour gradient can be drawn from the map.Ħ. We can calculate the area & capacity of a reservoir or any water bodies.ĥ. We can determine the area & volume of the earth of a particular locality.Ĥ. Helps to select the location of infrastructures such as dams, bridges, pipelines, roads, etc.ģ. Contour map provides the topography of the ground.Ģ. ![]() Define Contour interval is a line that connects the different points of equal height at the surface of the earth. Usually, there are different contour intervals for the different vertical distances on maps. show ipa See synonyms for: contour contoured contouring on noun the outline of a figure or body the edge or line that defines or bounds a shape or object. What are the uses of contour maps in surveying?ġ. Contour Interval Definition: A contour interval is a vertical height or a difference in elevation between contour lines in a topographic map. For the rough survey work such as location survey, finding catchment area, finding the capacity of water bodies, etc. For the larger scale map, the contour intervals are made of less spacing.įor the precise & detailed survey work, the contour interval should be smaller. Contour Interval means the difference in elevation or the vertical distance measured between consecutive contour lines Sample 1 Sample 2 Sample 3 Based on 3 documents Examples of Contour Interval in a sentence Contour Interval: Contours shall be indicated by broken lines, drawn at one-foot intervals, or otherwise approved or required interval. The contour spacing will be large for a map having a small scale. Steep slope: The contour intervals are generally big & are unequal Plain ground: The contour intervals are generally small & are parallel. Considering the size of the area to be mapped, contour intervals are assumed. Usually there are different contour intervals for the different maps. The contour interval depends upon the following factors. A contour interval in surveying is the vertical distance or the difference in the elevation between the two contour lines in a topographical map. What are the factors that affect the selection of contour intervals? ![]() A closed contour, inside of which the ground or. The contour interval is kept large When funds are limited and the contour interval is kept small when a fund is not a problem.For eg: Suppose a contour map has a contour line of 80, 85, 90, 95, & so on,Ģ. a line on a map joining points of equal height above or below sea level. To emphasize the 3-dimensional effect of. If the contour interval is small, greater time Will be take in the field survey, in reduction and in plotting the map. The standard vertical interval between contours is 2 or 2.5 m. If the time available is less, a greater contour interval should be used. ![]() Solution: Contour lines are Imaginary lines joining places that have the same height. The extent of the survey in such cases will generally be small in the case of location survey, for a line of communications and for reservoir and drainage areas, where the extent of the survey is large, a large contour interval is to be used. Explain contour values, contour intervals and index contour (1+1+1 marks). The contour interval largely depends upon the purpose and the extent of the survey.įor example, if the survey is intended for detailed design work or for accurate earthwork calculations, a small contour interval is to be used. contour intervals) The difference in elevation represented by the space between adjacent. Contours make it possible to show the height and shape of mountains, the depths of the ocean bottom, and the steepness of slopes. contour interval: contour interval (English) Noun contour interval (pl. Also Read : Something About Civil Engineering Design Software Purpose an Extent of The Survey Elevation contours are imaginary lines connecting points having the same elevation on the surface of the land above or below a reference surface, which is usually mean sea level.
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