COMPARATIVE RESEACH ON TWO COMBINED MODEL IN GPS LEVELING
Hu P. Xu · Cehui dili xinxi · 2007
Two combined models which are weighted combining model and hybrid fitting model in GPS leveling are discussed.Then we employ the two combined models and some single models,such as conicoid model,polyhedral function model,shepard curved surface model are used in approximating height anomaly in a test area.The results indicate that the precision and reliability in approximating height anomaly by combined models are better than any single model that are referred above,and the hybrid fitting model is more reasonably than weighted combining model in theory.