Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of plane tabling

The systematic errors which persist and have regular effects in the performance of a survey operation are due to

If whole circle bearing of a line is 120°, its reduced bearing is

In case of a double line river, contours are

The permissible limits of error in chaining for measurement on rough of hilly ground is

The curvature of the earth is taken into consideration if the limit of survey is

For indirect ranging, number of ranging rods required, is

Contour interval is

The technique of plotting all the accessible stations with a single set up of plane table is called