Surveying
Which of the following angles can be set out with the help of French cross staff?

90° only
any angle
45° only
either 45° or 90°

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Surveying
Homologous points are

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

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Surveying
The First Point of Aeries

Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
All listed here
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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