Surveying
Triangulation surveys are carried out for locating

Control points for surveys of large areas
Control points for photogrammetric surveys
Engineering works, i.e. terminal points of long tunnels, bridge abutments, etc.
All of these

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Surveying
The prismatic compass and surveyor’s compass

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

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