Asked by: Ibtissam Gehrz
hobbies and interests drawing and sketching

What is the factors affecting contour interval?

Last Updated: 30th March, 2021

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FACTORS FOR DECIDING CONTOUR INTERVAL
  • Scale of the map. The contour interval is kept inversely proportional to the scale of the map.
  • Purpose of the map. The contour interval on a map also depends upon the purpose for which the map is to be utilized.
  • Nature of the ground.
  • Availability of time and funds.

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Hereof, what are the contour intervals on this map?

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.

Likewise, what are the different methods of contouring? There are two methods of locating contours:

  • Direct method.
  • Indirect method.
  • Direct method- In direct method contour to be plotted is actually traced on the ground.
  • Procedure- The work is started from BM and the level is set up at the centre of the area.

Likewise, what do you mean by contour interval?

A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.

What is the rule of V's?

The Rule of V's helps us predict and understand the intersection between planar geologic surfaces (e.g., sedimentary beds and faults) and the land surfaces. The Rule of V's: 1. A bed whose dip angle is less than the slope of the valley bottom (creek) may V in direction opposite to its dip.

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What are the 3 types of contour lines?

There are 3 kinds of contour lines you'll see on a map: intermediate, index, and supplementary.
  • Index lines are the thickest contour lines and are usually labeled with a number at one point along the line.
  • Intermediate lines are the thinner, more common, lines between the index lines.

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What are the characteristics of contour lines?

Other characteristics of contour lines are:
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What is major and minor contour lines?

The major contour lines at the decades are logarithmic values that are equally spaced, and the minor contour lines are linear values that are logarithmically spaced.

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How do contour lines work?

Contour lines are lines drawn on a map connecting points of equal elevation, meaning if you physically followed a contour line, elevation would remain constant. Contour lines show elevation and the shape of the terrain. They're useful because they illustrate the shape of the land surface -- its topography-- on the map.

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How do you find the slope of a contour line?

To find the slope of a feature, the horizontal distance (run) as well as the vertical distance (rise) between two points on a line parallel to the feature need to be determined. The slope is obtained by dividing the rise over run. Multiply this ratio by 100 to express slope as a percentage.

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What is a contour interval answers?

Answers and Solutions
Answer: Contour Lines and Intervals. A contour line is a line drawn on a topographic map to indicate ground elevation or depression. A contour interval is the vertical distance or difference in elevation between contour lines.

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What does the contour interval 40 feet refer to?

What does the “contour interval 40 feetrefer to? It is referring to the difference in elevation between two adjacent contour lines.

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How do you use contour in a sentence?

contour Sentence Examples
  1. The contour lines showing the heights above sea-level are the directions along which species spread to form zones.
  2. The west central portion has considerable irregularities of contour, and the north-west is distinctively hilly.
  3. The sleek contour of the vase was eye-catching, so Brenda decided to purchase it.

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What is a depression contour?

Definition of depression contour. A closed contour, inside of which the ground or geologic structure is at a lower elevation than that outside, and distinguished on a map from other contour lines by hachures marked on the downslope or downdip side.

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What is a contour profile?

A topographic profile or topographic cut is a representation of the relief of the terrain that is obtained by cutting transversely the lines of a topographic map. Each contour line can be defined as a closed line joining relief points at equal height above sea level.

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Can contour lines cross?

A contour line is a line joining all points of equal height or elevation on a map. Therefore, in one particular section of a map, there cannot be more than one contour line for a particular elevation. Thus contour lines will never intersect.

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What is vertical interval of the map?

(cartography) The vertical distance on the ground which separates adjacent contour lines on a map.

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What is contour planning?

Contour plans are a graphical representation of the lay of the land. They show the degree of slope on a site. They typically relate back to a site datum.

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What are the three main types of topography?

Topography Types
  • Karst Topography. Karst topography describes the distinct landscape that is made when underlying rocks dissolve or change shape.
  • Mountain Topography. Topographical maps show landforms such as hills and mountains.
  • Vegetation, Elevation and Glaciers.

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What is meant by contour survey?

Contour Survey Meaning
Contouring in surveying is the determination of elevation of various points on the land and fixing these points of same horizontal positions in the contour map. In the land property world, a contour is an outline of a mass of land.

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What is capacity contour?

The constant vertical distance between two consecutive contours is called the Contour Interval and the horizontal distance between any two adjacent contours is termed as the horizontal equivalent. The horizontal equivalent depends upon the slope of the ground.