In a plane table survey, the intersection method is particularly useful for locating details that are:
Correct answer: C. Difficult to approach directly
- A. Very close to a single occupied station
- B. Located only on a straight chain line
- C. Difficult to approach directly
- D. Required only for elevation measurement
Explanation
In the intersection method, rays are drawn from two known table stations and their intersection fixes the detail point. It is useful when the point is inaccessible or inconvenient to occupy.
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About Surveying
Surveying covers measurement of distances, angles and elevations, traversing, levelling, contouring, plane table work, theodolites, total stations and basic photogrammetry. It includes error adjustment, coordinate calculations, area and volume determination, and the distinction between accuracy and precision, as well as between temporary and permanent adjustments.
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