Surveying in Levelling: Definition, Methods, Types, Basic Terms & Applications
IMPORTANT LINKS
Methods of Levelling in Surveying
Levelling in Surveying FAQs
Name different types of levels
Dumpy level, Tilting level, Quick setting level, Auto level, Laser level etc to name a few.
How is the rise and fall method better than height of the instrument method in surveying operation ?
Rise and Fall method provides a check on intermediate sight whereas the Height of Instrument method provides a check on Back Sight and Fore Sight only.
How do we define the size of a theodolite ?
The size of a theodolite is defined by the diameter of the lower plate.
What are the characteristics of contour lines ?
Some of the characteristics of contour lines are as follows :
The distance between them indicates the steepness of the slope.
They do not cross each other except in special cases like overhanging cliffs.
Irregular contour lines signify rough terrain and uniform contour lines signify smooth terrain.
In concentric contour lines, a higher value inside shows a hill and a lower one indicates depression.
Define Back Sight, Intermediate Sight and Fore Sight.
Back sight is the first reading taken after setting up the instrument, Fore Sight is the last reading before shifting the instrument station and all other readings recorded between these two are called Intermediate Sight.