Surveying

Today I am going to talk about surveying. Surveying is most essential part of engineering technology. Specially for civil, electrical and such as others engineering without it, nothing is possible. So you can understand what is the value of surveying?

Yes, surveying is an art of making such measurements which will determine the relative positions of points on the surface of the earth in order that the shape and extent of any portion of the earth's surface may be ascertained and delineated on a map of plan. It is essentially a process of determining position of points in horizontal plane.

There are various types of surveying such as geodetic surveying, plane surveying, chain surveying etc. You can see a few explanation with definition of all surveying as given below, which may help you.

Geodetic Surveying:

It is also known as trigonometrical surveying. It is necessary to take into consideration the curvature of the earth, since large areas and distances are covered. Since the shape of the earth is spherical the line connecting any two points on the surface of the earth will be curved. All the lines in the surface of the earth will be curved lines and the triangles will be spherical triangles. This surveying is done when work of very high precision is required.

Plane Surveying:

In plane surveying the earth surface is assumed to be plane. All the lines and triangles will not be curved, but straight and plane triangles. This survey is done when too much precision is not required. In all engineering purposes this type of survey is generally conducted.

Chain Surveying:

In this method chain is used for survey. There are various types of chain surveying such as metric chain surveying, gunters chain, revenue chain etc.