Surveying
The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as

Ground principal point
Ground plumb point
Iso-centre
Perspective centre

ANSWER DOWNLOAD EXAMIANS APP

Surveying
In triangulation surveys

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

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Systematic errors

All listed here
Always follow some definite mathematical law
Can be removed by applying corrections to the observed values
Are also known as cumulative errors

ANSWER DOWNLOAD EXAMIANS APP