Hydraulic engineering coordinate conversion model and accuracy analysis

According to the basic principle of three-dimensional space rectangular coordinate conversion based on the Bursa-Wolf model,the author analyzed the method for conversion between different coordinate systems of hy draulic engineering.Coordinate conversion of high accuracy is feasible by modifying the weights of some public points’coordinate with low accuracy and adopting indirect adjustment method.Practice example was also present ed to prove this method can be appliod in coordinate conversion between different reference ellipsoid of hydraulic engineering.