The research and management of ArcObjects used in conversion system of GPS heights

We need to separate GPS height area Quasi-geoid into several parts when transforming GPS height in a large area, and the height abnormal precision on the unknown points is related deeply to the distribution of the known points, the paper puts forward that we should separate GPS height area for every unknown point in order to obtain higher precision, therefore, it will take much time and energy to get higher precision for every calculating time. So, one system used for transforming GPS height is made up instead of fussy operation, which introduced in this paper how to deal with the problem considering of Visual Basic combined with ArcObjects. The system bring more convenience to the users.