GEOID HEIGHT COMPUTATION IN STRIP-AREA PROJECTS BY USING LEAST-SQUARES COLLOCATION
Küçük Resim Yok
Tarih
2016
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Acad Sci Czech Republic Inst Rock Structure & Mechanics
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
GPS/leveling technique is the most effective engineering method for the determination of heights and height differences. This method is based on the principal of conversion of ellipsoid heights to orthometric heights. For transformation, polynomial surface models are generally used for study region or area. The accuracy of results depends on the location and distribution of selected reference stations with known ellipsoidal and orthometric heights. Especially, in the strip area projects (highway, railway, channel etc.) polynomial curve model is used instead of polynomial surface model due to reference stations disturbing along a route. In this research, Least Squares Collocation (LSC) methods used in determining the geoid heights of a strip area were examined. For this purpose, GPS/leveling data of Bozkurt-Dinar (Afyonkarahisar) train project which is approximately 75 km was used in order to examine LSC methods. The ground control stations of the project were classified as reference and test for the purpose of this research. The geoid heights of test stations were calculated by curve polynomial with different degrees. Additionally geoid heights at the same points were calculated using polynomial curve fitting based on LSC which is suggested by this research. The geoid heights by computed using LSC approach when compared to polynomial curve method were observed to yield better results.
Açıklama
Anahtar Kelimeler
Gps/Leveling, Strip Area, Least-Squares Collocation, Geoid, Interpolation
Kaynak
Acta Geodynamica Et Geomaterialia
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
13
Sayı
2
