A staff reading taken on a point whose elevation is to be determined as a change point is called
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Foresight reading
दूरदर्शिता पढ़ना
Backsight reading
पश्चदृष्टि पठन
Intermediate sight
मध्यवर्ती दृष्टि
Long sight
दूरदृष्टि
Foresight reading
दूरदर्शिता पढ़ना
A foresight is a reading taken on a position of unknown coordinate(s). Since a survey progresses from a point of known position to points of unknown position, a foresight is a reading looking "forward" along the line of progress.
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