- Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi
- Vol: 17 Issue: 3
- Comparative Analysis of Least-squares Approaches for 3D Datum Transformation in Western Turkey
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 : 8
Publication Date : 2017-12-29
Article Type : Research
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).