Region quasi-geoid refining method based on CQG2000

The invention discloses a region quasi-geoid refining method based on CQG2000, including the followings: step one, the CQG2000 is used as a platform, and GPS leveling data is used for determining the quasi-geoid model of the region to be measured according to remove-fit-restore method; step two, GPS system is used for obtaining the real-time geodetical coordinates of any unknown point in the region to be measured, and measured data are transmitted to an arithmetic and control unit that uses the constructed region quasi-geoid model to convert the measured GPS geodetic height of the known point into normal height, i.e., leveling height, in real time. The method is simple and convenient to be carried out, the measured data are accurate and reliable, and the measurement speed is quick, thereby being capable of efficiently solving the problem of geoid fitting defect caused by no gravity data obtained when the quasi-geoid is refined and the problems of complicated measuring processes and big measuring cost when gra