Task 3 survey CALC. & Report Flashcards
1
Q
What is digital levelling?
A
Digital levelling refers to the process of using electronic instruments to measure and adjust the elevation or level of surfaces with high precision in various applications.
2
Q
Why is leveling done in construction?
A
ensure all the levels on site refer to a datum, including floor levels and drains.
3
Q
what are the two types of levelling?
A
1) differential / spirit levelling
2) indirect - trigonometric or barometric.
4
Q
what is backsight?
A
the first reading of any set up and would be booked in the column labeled backsight.
5
Q
How do you calculate starting reduced level?
A
height of collimation - intermediate sight
6
Q
How do you calculate the reduced level (excluding the starting level) ?
A
height of collimation - backsight
