The dumpy level is an optical surveying instrument used to determine relative elevations and distances of points in a survey. It consists of a telescope secured by collars and spindles to a horizontal stage. The telescope can only rotate horizontally. Dumpy levels are used to measure heights and distances between locations. They have simple construction, require few adjustments, and retain accuracy over time due to rigidity. However, they can be difficult for engineers to use accurately and are not as easy to operate as other instruments.

1. Talaviya Malay

2.  Dumpy level is an optical surveying leveling
instrument consisting a telescope tube firmly
secured in two collars fixed by adjusting screws
to the stage by the vertical spindle.
 The telescope can rotate only in a horizontal
plane. Relative elevation of different points of a
surveying land is determined with dumpy level.

3. Use of Dumpy Levels
 The dumpy level is mainly used in surveying for
the following purposes:
 To determine relative height and distance among
different locations of a Surveying land.
 To determine relative distance among different
locations of a surveying land.

4. Advantages of Dumpy
Level Survey
 Simple construction with fewer movable parts.
 Fewer adjustments to be made.
 Due to the rigidity of dumpy levels, it retains its
two adjustment for a long time.
 High optical power.

5. Disadvantages of Dumpy Level
Survey
 Civil Engineers may be find it difficult in
making accurate measurements.
 Difficulty in using

6. Dumpy level

7. How to use a Dumpy Level for
Surveying
 At first the Dumpy Level instrument is set
up on a tripod.
 Using foot-screws (leveling screws) the
Dumpy Level is set to a leveled condition.
 The operator looks Through the eyepiece of
the telescope.

8.  An assistant holds a tape measure or graduated
staff vertical at the point under measurement.
 The elevations (levels) of different points IS
gathered with the help of the instrument and staff.
 Measurement generally starts from a benchmark
with known height determined by a previous
survey, or an arbitrary point with an assumed
height.

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