Surveying
The height displacement on a vertical photograph

Increases as the ground elevation increases
All listed here
Increases as the horizontal distance increases from the principal point
Decreases as the flying height increases

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Surveying
Homologous points are

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

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Surveying
Spring tides are caused when

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

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