Surveying
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

error due to displacement of station signals
error due to wrong adjustment of line of collimation and trunnion axis
error due to inaccurate graduation
error due to eccentricity of verniers

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Surveying
Homologous points are

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

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