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In an indirect method of contouring, the best method of interpolation of the contour is
- a)By graphical method
- b)By estimation
- c)By arithmetical computation
- d)All of these
Correct answer is option 'C'. Can you explain this answer?
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In an indirect method of contouring, the best method of interpolation...
Indirect Method of Contouring
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Indirect methods are quicker, cheaper and less laborious than the direct method.
In this method, a series of guide points are selected along with a system of straight lines and their elevations are determined.
These points are then plotted, and contours are drawn by interpolation.
Three methods used for interpolation are as follows:
i) By Estimation
This is a rough method and is used on a small-scale map.
ii) By Arithmetic Calculations
This is a very accurate method but a tedious one. The position of contours points between guide points is located by arithmetic calculations.
iii) By Graphical Method
This is a rapid and convenient method and gives higher accuracy than the estimation method. However, it involves a lot of interpolation work.
Note:
Arithmetical Calculation is considered more accurate than a graphical method, as the graphical method assumes only linear variation between the two guide points.
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In an indirect method of contouring, the best method of interpolation of the contour isa)By graphical methodb)By estimationc)By arithmetical computationd)All of theseCorrect answer is option 'C'. Can you explain this answer?
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