Surveying
The allowable length of an offset depends upon the

method of setting out the perpendiculars and nature of ground
degree of accuracy required
scale of plotting
All of these

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Surveying
The prismatic compass and surveyor’s compass

both give QB of a line and WCB of a line
both give QB of a line
both give WCB of a line
give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively

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Surveying
For mapping any country

All listed here
Primary triangles are broken down into secondary triangles of somewhat lesser accuracy
Geodetic triangulation of greatest possible sides and accuracy is carried out
Secondary triangles are further broken into third and fourth order triangles, the points of which are used for detail surveys

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