Theory question 202
Surveying(a) Explain the term Traversing. (b) A traverse along a path in a school compound produced the following field records:
Line AB: length 100 m, bearing 70°
Line BC: length 350 m, bearing 120°
Line CD: length 120 m, bearing 85°
Line DE: length 75 m, bearing 55°
Use the field records above to plot the path on a scale of 1 cm to 50 metres. (c) What is the distance, in metres, between A and E along the traverse line?
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(a) Traversing is a survey method in which a series of connected straight lines is measured for length (tape or chain) and direction (prismatic compass bearing) to map a path, road, river or boundary; it may be open (does not return to the start) or closed.
(b) Convert: AB 2 cm, BC 7 cm, CD 2.4 cm, DE 1.5 cm; at A draw a north line and plot AB on 70°, then from each new point a north line and the next bearing; label stations, give title, scale and north arrow.
(c) Distance along the traverse = 100 + 350 + 120 + 75 = 645 m.
Draw a fresh north line at every station before measuring the bearing.