16.Detailed plotting is generally done by

17.After fixing the plane table to the tripod, the main operations which are needed at each plane table station are i) levelling ii) orientation iii) centering The correct sequence of these operations is

18.For a tacheometer the additive and multi-plying constants are respectively

19.The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called

20.Intersection method of detailed plotting is most suitable for