Determination of Relative Positions of Points Without Establishing Physical Contact With The Object By Concept Of Photogrammetry

Abstract

Research work done in Terrestrial photogrammetry to calculate and determine various unknown relative positions and parameters of the object. Photogrammetry is one of the surveying concepts of civil engineering to calculate accurate measurements using photographs. Can also be performed without establishing physical contact with the object. Determination of following unknown parameters. The first phase of procedure is: (1.1) Determination of Camera Focal Length. The second phase of procedure is: (2.1) Determination of horizontal distance between the object "A" and the instrument station "M". Second phase also includes (2.2) Determination of horizontal distance between the object "A" and the instrument station "N". The third phase of procedure is: (3.1) Determination of Reduced Level (elevation) of the object point. Initial declaration of pre conditions: The photographs of the object were take from two camera stations M and N with a known measured distance between ground station points "M" and N being 124 meters called as base line. No physical contact was established with the object.