Part 1 Introduction
Why do we need Precise Levelling? Precision of modern instruments. What makes
precise levelling precise? Precise equipment and precise procedures.
Part 2 Precise Levelling
Tilting and automatic precise levels. The micrometer. Invar staves with dual
scales and supports. Change plates. Conventional and removable wall mounted
bench marks. The precise levelling team.
Part 3 Procedures
2 peg test. Booking form - dual scales. Reconnaissance. Refraction. Care of
the equipment. Wind. Stability. 21 rules of procedure for minimizing errors. How
the rules are implemented. Checks upon observations and computations.
Part 4 Example procedure
2 bays of precise levelling between bench marks to show the practical
application of the procedures described in Part 3.
Part 5 Exercise
An interactive exercise that uses 4 bays of precise levelling. Watch the
video as the observer, and then complete the computations and checks. Can be
used by lecturers as course work for assessment.
Part 6 Gap Crossing
How to use precise levelling equipment to transfer height across a river or
other inaccessible gap that is wider than normal precise levelling will allow.
Total running time approx. 50 minutes
How to Get a copy
Precise Levelling More Pictures