surveying is divided into two main divisions . they are plane surveying and geodetic surveying
Answers
Answer:
mai to plane se khali pochinki ke liye utar ta hun aur kahi nhi jata
Answer:
The 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 a plane surface.
If the area to be surveyed is more than 1000 km2, the angles measured on the surface of the earth cannot be in a plane surface but are on a curved surface, therefore, geodetic surveying must be employed to achieve precision for large areas.
Explanation:
Plane Surveying -
Plane surveying is a branch of surveying in which the surface of the earth is considered as plane surface. For small projects covering Area less than 250 sq.km. Earth curvature is not counted for in distances.
The earth surface is considered as plain surface
The Curvature of the earth is ignored. (i.e., 2 dimensional)
Survey accuracy is low
Line joining any two stations is considered to be straight
The triangle formed by any three points is considered as plain
Carried out for a small area of <250 km
Plane surveying uses normal instruments like chain, measuring tape, theodolite etc.
Geodetic Surveying -
Geodetic surveying is another branch of surveying in which the curvature of the earth is considered when taking measurements on earth’s surface. When survey extends over a large areas more than 250 sq. km. and degree of accuracy is also great. Geodetic survey is used to provide control points to which small surveys can be connected.
The earth surface is considered as curved surface
The Curvature of the earth is taken into account
Survey accuracy is high
The line joining any station is considered as spherical
The triangle formed by any three points is considered as spherical
Carried out for area of >250 km
Geodetic surveying uses more precise instruments and modern technology like GPS.