A Simplified Model of Three Dimensional Datum Transformation Adapted to Big Rotation Angle

Three dimensional datum transformation is widely used in geodesy, photogrammetry, engineering survey and other subjects. The Bursa model,molodensky model etc. are usually used. General speaking, they are mainly suitable in small angle's three-dimensional datum transformation. But in actual, a lot of large angles' three-dimensional datum transformation need to be performed. This paper puts forward a simplified model of three-dimensional datum transformation that can suit any angle.