Which Levelling rod is used for precise work?
What is precise leveling?
Which instrument is mainly designed for precise levelling work?
The line of collimation, is, however, made horizontal for each pointing of telescope by means of tilting screw. It is mainly designed for precise leveling work.
What is precise leveling in surveying?
What is collimation method?
What is reciprocal levelling?
What is line of collimation in surveying?
How do you use staff and dumpy level?
What is geodetic levelling?
What are the different types of Levelling staff?
What is an RL in surveying?
What is datum line in Levelling?
What is an Invar staff?
What is telescopic levelling staff?
What is French Cross staff?
French cross-staff consists of an octagonal brass tube with slits on all eight sides and on each of four sides, it has an alternate vertical sighting slit and an opposite vertical window with a vertical fine wire. For setting out right angles, these are used and sights are about 8 cm.