Surveying
Homologous points are

Nodal points of the camera lens
Opposite corners of a photograph
Corresponding points on the ground and photograph
Plumb points of stereo pair of photographs

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Surveying
Spring tides are caused when

None of these
Sun and moon are in line with earth
Solar tidal force acts opposite to lunar tidal force
Solar tidal force and lunar tidal force both coincide

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Surveying
The First Point of Aeries

All listed here
Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
Is the point in the celestial sphere where zero meridian crosses the celestial equator
Is usually denoted by the Greek letter ?

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