DISCUSSION ABOUT TRANSFORMATION BETWEEN BEIJING 54 AND XI’AN 80 COORDINATE SYSTEM——Baed on the geodetic database in Hubei province
Zhang Long-qi · Chinese Journal of Engineering Geophysics · 2005
The paper discusses transform between Bejing 54 and Xi’an 80 coordinates system based on the whole differential equation of geodesic, and some improvement has been made in the 3 parameter method and the 7 parameter method. And the experimentation, which is based on the geodetic database in Hubei province, has been made to analyse the effect of the range, account and precision grade of known control points on the calculating result.