Definition And Purpose

Photogrammetry is defined as the art, science and technology of obtaining reliable information about physical objects and the environment through process of recording, measuring, and interpreting photographic images and patterns of recorded radiant electromagnetic energy and other phenomena. Photogrammetry is a standard practice in land survey and is widely used for mapping.

Eligibility Criteria

To ensure accountability and professionalism in the conduct of Cadastral Survey it is a must that quality, regulatory and disciplinary control be imposed on firms involved in the filed. The proprietor or partners of these firms must therefore be professionally qualified as well as registered with the Land Surveyors Board.

Methodology and Instrumentation

Photogrammetry required the area to be mapped, be covered by strips of overlapping aerial photographs. Each overlapping pair of aerial photograph is then mounted on a special equipment called the stereoplotter and is oriented so as to obtain a 3-D stereo model. All measurements of visible features, man0made or natural as well as height information can then be carried out in this properly oriented model and output graphically or digitally.

Generally, a photograph project consists of the following fundamental phases:-