Surveying
23 cm × 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents

2 m
1 m
4 m
3 m

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

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

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Surveying
In triangulation surveys

All listed here
Control stations are located from which detailed surveys are carried out
Sides are not measured excepting the base line
The area is divided into triangular figures

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