OBSTACLES IN CHAIN SURVEYING

Q.A survey line ABC crossing a river at right angles cuts its banks at B and C. To determine width of river BC, a line BE, 30 m long was set out roughly parallel to the river. A point D was found in CE produced and middle point of DB determined, EF was then produced to G, making FG equal to EF, and DG produced to cut the survey line in H. GH and HB were found to be 20 and 40 metres long respectively. Find the distance from B to C.

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Q.A survey line ABC crossing a river at right angles cuts its banks at B and C. To determine width of river BC, a line BE, 30 m long was set out roughly parallel to the river. A point D was found in CE produced and middle point of DB determined, EF was then produced … Read more

OBSTACLES IN CHAIN SURVEYING

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OBSTACLES IN CHAIN SURVEYING OBSTACLES IN CHAIN SURVEYING   The objects, which create obstruction or difficulty in continuing the chaining of a survey line, are called obstacles. There are many obstacles which create obstruction to the chaining or ranging, they may be pond, Hill, river, valley, building etc. Various methods are adopted to overcome these … Read more