What is Plane Surveying?

Plane surveying is the surveying conducted by assuming the earth's surface is flat. Here the spheroidal shape or curvature of the earth's (Oblate) surface is ignored.

What is Plane Surveying?

Features of Plane Surveying

1. In plane surveying, the line joining two points on the earth is considered to be straight. Consider two points A and B on the earth's surface. When the two points are too close, that their curvature is not known, then the line joining the two points is straight. Hence the earth's surface is considered a plane.

2. The triangle that is formed by joining three points on the earth's surface is called a plane triangle. The angle formed is a plain angle.

3. The plumb bob line passing through the two points A and B are parallel to each other in the case of plane surveying.

4. Plane surveying is adopted when the area of surveying is less than 195.5 km2.
5. Plane surveying is carried out either by local or the state agencies like R and B department, railway department, or irrigation department. 

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  1. Soul Liberator10 March

    Curious as to why after 195.5 km2 it is done by government ??

    1. Hi,

      For larger areas greater than 200 km2, we need to consider the curvature of earth and hence we follow Geodetic Surveying: This type of surveying is being carried out for highly precise work and is adopted for surveying of large area. Geodetic survey is commonly conducted by government department of state or country.


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