Surveying
G.M.T. corresponding to given mean time, equals

L.M.T. - West longitude in time
L.M.T. - East longitude in time
L.M.T. + East longitude in time
None of these

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Surveying
For mapping any country

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

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