Survey I

Trilateration and Triangulation: Electronic Distance Measurement and Satellite Stations and Inter-visibility of Triangulation Stations

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Introduction Triangulation and Trilateration is a horizontal control survey whose purpose is to determine the position of a number of control points or stations precisely. The basic framework of the control points are the triangles both in the triangulation and trilateration. Triangulation It is the method of providing control points by measuring all the angles … Read more

Contouring and Its Method: Contour Interval, Interpolation, Characteristics and Uses of Contour Maps

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Basic definition in Contouring: A line joining points of equal elevations is called a contour line. It helps to visualize the relief of ground in two dimensional plane or map. The method of plotting contours in a plan or map is called conturing. A contour line marked by a heavier line weight to distinguish it … Read more

Introduction to EDM, Theodolite and Total station

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Principle of Electronic Distance Measurement and Use of EDM: Electronic distance measurement(EDM) is a method of determining the length between two points using electromagnetic waves. EDM is commonly carried out with digital instruments called theodolites. EDM instruments are highly reliable and convenient pieces of surveying equipment and can be used to measure distance of upto … Read more

Surveying: Principle, Classification and Unit of Measurement

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Definition of surveying: Surveying is the art of determining the relative positions of distinctive feature on the surface of the earth or beneath the surface of the earth, by means of measurements of distances, directions and elevations. The branch of surveying which deals with the measurements of relative heights of different points on the surface … Read more