Comparative Analysis of Least-squares Approaches for 3D Datum Transformation in Western Turkey

Authors : Mevlut GULLU, , Mustafa YILMAZ, Tamer BAYBURA

Pages : 1019-1029

View : 44 | Download : 12

Publication Date : 2017-12-29

Article Type : Research Paper

Abstract :In Turkey, the national reference frame was changed for geodetic applications in parallel with the increasing use of Global Navigation Satellite System technology. Due to the reference frame change, the three-dimensional (3D) datum transformation has become compulsory between ED50 and WGS84. Several 3D datum transformation algorithms have been developed for geodetic applications. The well-known technique is the Least-Squares (LS) method. In this study, alternative 3D datum transformation approaches (including the Total Least-Squares (TLS) and the Weighted TLS (WTLS) methods) were compared with the LS method over a test area. The results showed that the WTLS transformed 3D coordinates with better accuracy than the LS and TLS methods.
Keywords : 3D datum transformation, Least Squares LS, Total Least Squares TLS, Weighted Total Least Squares WTLS