Controlling Length Deformation Caused by Elevation According to Coordinate Transformation

摘要

Because of the influence of elevation, Surface observation distance and reference ellipsoid distance is not equal, Resulting in length deformation, The size of the deformation is caused by elevation, In order to meet the requirements of measurement accuracy, It must be controlled within a certain range. In this paper, through establishing measuring reference, realized coordinates transformation in the national reference, it is very effective to control length deformation which is caused by elevation, at the same time, the relative position of survey area is unchanged in the national coordinate system.