Surveying
The maximum error in radial line assumption, is

h/H f² tan θ
h/H f² sin θ
h/H f cos θ
h/H f tan θ

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Surveying
The prismatic compass and surveyor’s compass

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

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