Plane table levelling

Trigonometric levelling

Reciprocal levelling

Simple levelling

1.700 m

1.600 m

1.500 m

0.700 m

To measure vertical angle only

To measure inclined angle only

To measure horizontal angle only

To measure horizontal vertical angles

Auto level

Dumpy level

Transit theodolite

Non-Transit theodolite

Double sighting

Least count

Swing

Contouring