Different types of surveying process
In this construction video tutorial, Ms.C.S.Suganya, the renowned assistance professor in civil engineering department, has briefly explains surveying and it’s different categories.
The surveying is primarily segregated in two parts
Geodetic surveying refers to the survey under which the curvature of the earth is considered and superior degree of perfection in linear and angular observations is gained. The geodetic surveys spread over big areas and lines relating any two points on the surface of the earth are taken as arcs. To workout their predictable distances on the plans or maps, the rectification for the earth’s curvature is employed to the calculated distances. The angles among the curved lines are considered as spherical angles. A knowledge of spherical trigonometry is required for creating measurements for the geodetic surveys. The area remains at 250 kilometer square.
Plane surveys are mostly recognized process of surveying and here, the earth is taken as a flat or "plane" surface. It is useful for small-scale surveys in restricted areas, the curvature of the earth does not provide any impact on the results, consequently, the calculations and results can be referenced to a plane or flat surface. The surveying is done for less than 250 kilometer square.
A land survey, or simply survey, stands for the scientific process of calculating the dimensions of a specific area of the earth's surface, along with its horizontal distances, directions, angles, and elevations.
Hydrographical survey belongs to the science of measurement and explanation of features which impact maritime navigation, marine construction, dredging, offshore oil exploration/offshore oil drilling and relevant activities. Astronomical Surveying
An astronomical survey refers to a general map or image of a area of the sky which requires a definite observational target. On the other hand, an astronomical survey may contain a set of various images or spectra of objects which contribute to a common type or feature. To get more detailed information, watch the following video tutorial.