In this video, BenchMark , various types of BenchMark, Levelling and Various types of levelling has been discussed.
Benchmark - It is a point of known elevation.
Types:
a) Great Trigonometrical Survey (GTS) benchmark.
b) Permanent Benchmark
c) Temporary Benchmark
d) Aribitrary Benchmark
Various types of levelling:
a) Simple levelling
b) Differential levelling
c) Fly levelling
d) Profile levelling
e) Reciprocal levelling
f) Precise levelling
Негізгі бет 6.3 Benchmark and Types of levelling
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