state the factors to be considered while selecting baseline and also explain ine with neat sketcher how to extend the base field
Answers
Answer:
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Answer:
Baseline Site:
In selecting site for a base line, the following requirement should be considered.
The site should be fairly leveled or uniformly sloping or gently undulating.
Should be free form obstructions throughout the entire length.
Ground should be firmed and smooth.
The site should can be such that the whole length can be laid out the extremities of the line being inter-revesible at ground level.
The site should be such that well shaped triangle can be obtained in connecting the end stations of the base line to the main triangulation stations.
Base Net:
A series of triangles connecting a base line to the main triangulation is called a base net. The base should be gradually expended by triangulation as shown figure (i) and (ii)
Equipment for Baseline Measurements
Tape
Straining Device
Spring balance or weight and pulley
Thermometers and a finely divided scale
Marking tripod or station rakes
Supporting tripods or stakes.
Explanation:
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