Application of ground-based stereophotogrammetric survey in the technical inventory of real estate objects

Abstract

The general methods of land survey for the purposes of technical inventory of real estate units don’t allow creating visual materials and forms of real estate objects elements that can have some errors. The new method of land survey with the stereo photography and GNSS coordinating of station is free of this weaknesses. The land surveys of object must be made with photogrammetric constructеs, which consist of 3, 4 or 6 snapshots. Stations must have noncollinear position. Minimal base lines must be calculated according to acceptable errors of buildings measurements. The research shows that all photogrammetric constructеs are of equal accuracy. The photographing with 4 or 6 stations is more informative because of different lines of sight. The result of this surveys is a 3D model. Measurements of forms of real estate objects elements with 3D models have high accuracy. The survey examples of different objects shows high accuracy results of 2D and 3D measurements, which are made with 3D model. The implementation of the method of land survey with the stereo photography for the purposes of technical inventory of real estate objects makes real progress in the creation of 3D cadaster.