Describe in brief primary classification of surveying

Describe in brief primary classification of surveying
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1 Answer

Answer :

Primary Classification

Geodetic Survey

The geodetic surveying is that type of surveying which takes into account the curvature of earth’s surface. It is generally adopted for large area (more than 250 Sq.Km). A line connecting two points is regarded as an arc. The distance between two points is corrected for the curvature and then it is plotted on the plan.

The geodetic surveying deals with fixing widely spread control points, which may afterwards used for fixing minor control points for plane survey. It is performed by government agencies. In India it is done by Great Trignometrical Survey Department (G.T.S). It is carried out with high degree of precision and accuracy.

Plane Survey  

Plane surveying is that type of surveying which does not take into account the curvature of the earth, and the surface of the earth is treated as plane surface. When we deals with only small portion of earth’s surface , the above statement is justified. Plane survey is carried out for small areas (upto 250 Sq.Km). Measurements plotted will represent the projection on the horizontal plane of the actual field measurements.
The degree of accuracy is comparatively low. It involves plain trigonometry. Plane survey can be carried out by any agency concerned.
Plane survey are done for engineering projects on large scale such as Bridges, Dams, Location and Construction of canals, highways, railways etc.
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