Number of links per meter length of a chain are

During levelling if back sight is more than foresight

Cadastral map is a map having

Reduced bearing is:

Removal of parallax, may be achieved by focusing

left swing is not much favoured in theodolite survey because

A freely floating needle slightly gets inclined to the horizontal anywhere except on the equator. It is called

Rise and fall method is used in

When a chain is used at a temperature more than the temperature it was calibrated, the error in measured length will be