True meridians are generally preferred to magnetic meridians because ............

Straight, parallel and widely spaced contours represent ............

Geodetic surveying is different from plane surveying because of ............

The horizon glass of the box sextant is ............

The length of an engineer's chain is ............

The reduced level of a point on the ground is called ............

A 30 m chain after measuring a distance of 6000 m was found to be 10 cm more than the designated length. If the chain wa…

Systematic errors are those errors ............

The true or geographical meridians through the various stations ............