Pros and Cons of Contour Interval

 Pros and Cons of Contour Interval

Pros:

  1. Provides an in depth illustration of the topography of a place: The contour c program languageperiod indicates the elevation of a place and gives an correct illustration of its topography.
  2. Helps with navigation: Contour traces on maps may be used to discover hills, valleys, and different capabilities that could assist hikers and outside fans navigate thru unexpected terrain.
  3. Useful in engineering and creation: Engineers and creation specialists use contour maps to layout roads, buildings, and different systems to suit the topography of a place.

Cons:

  1. Can be tough to study: Contour traces may be dense and near together, making them tough to study, particularly for beginners.
  2. Limited accuracy: The contour c program languageperiod is restricted via way of means of the size of the map, so a map with a small scale might not offer sufficient element to be useful.
  3. Can be misleading: The contour might not as it should be constitute the authentic elevation of a place, particularly in regions with rugged terrain or surprising adjustments in elevation.
  4. Can be tormented by herbal adjustments: Natural failures along with landslides, earthquakes, and volcanic eruptions can alternate the topography of a place, rendering contour maps old or inaccurate.

Methods of Contouring

There are  strategies of finding contour

  1. Direct Method
  2. Indirect Method

1. Direct Method of contouring

This technique is tough and time-consuming. In this mode, the contour is located at once at the floor, and the factors of a given area are displayed at the floor. Then those factors are calculated and discovered inside a sure variety of positions at the horizontal plane. You can now plan your map at the map. Fieldwork worried on this technique includes:

2. Indirect Method

In this technique, levelling paintings is accomplished on-site, and the region of the contour factors is accomplished withinside the office. Site surveys include: It establishes a clean sample of floor factors with acknowledged relative positions. This technique Determine the altitude of those factors at the site. The oblique technique is cheaper, quicker and now no longer uninteresting than the direct technique.

Consideration When Choosing The Appropriate Contour Interval

Before making ready a contour map, the specified contour c program languageperiod is decided. Taking into consideration the subsequent elements on which the contour c program languageperiod depends

  • Surface: The Nature Of The Floor Surface
  • Map Scale
  • Purpose And Extent Of The Survey
  • Time And Expense Are Required

Uses of Contour Intervals in Surveying

  1. When a massive location is to be mapped in small piece of paper contour durations are used. A better contour c program languageperiod is used for a massive location and small contour c program languageperiod for small location.
  2. In a massive map, index contour traces are much less to maintain it easy to study the map easily. In this case, to discover the intermediate factors elevation, contour durations are used.
  3. Earthwork estimations for any sort of shape like bridges, dams or roads may be discovered out with the assist of contour durations in a map.

Computation Of Intervals

The computation of the contour durations is as below,

  1. Step 1:-First of all, discover  index contour traces which are named with a specific elevation.
  2. Step 2:-Now compute the distinction among the 2 decided on index contour traces mounted from a map. To gain the distinction, subtract the better improved line from the decrease improved line reading.
  3. Step 3:-Directly be counted number the wide variety of non-index line contour traces among the 2 index contour traces exact for the contour c program languageperiod computing withinside the 1st step.
  4. Step 4:-The wide variety of traces received withinside the above step is acquired and brought with 1. For Example: If the wide variety of traces among  index traces is five. Then upload 1 to five which will become 6.
  5. Step 5:-The remaining step is the quotient of the distinction among  index traces (step 2) and the wide variety of traces among  index traces plus 1 (step five).
  6. Step 6:-The remaining solution we get after dividing is the contour c program languageperiod of the unique topographical map.

How to Find Contour Interval?

The calculation of the contour c program languageperiod,

  • Considering the above map for the calculation of durations, the stairs worried in contour c program languageperiod computation.
  • Let`s anticipate  index contour traces, 7000 and 7100, and compute the c program languageperiod among them.
  • The distinction among the 2 decided on index contour traces 7100 and 7000 is 7100 – 7000 = a hundred
  • Now be counted number the wide variety of non-index traces contour traces among 7000 and 7100 as four.
  • The wide variety of traces received withinside the above step is four and brought with 1.
  • Adding, four + 1 = five
  • Now divide a hundred via way of means of five, a hundred/five = 20 units

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