Practical Processing Techniques And Methods Of Engineering Gps Data To Study

GPS is widely applied in the fields of Surveying.The development of GPS has resulted in a profound technological transformation in the field of surveying. With the development of GPS technology, there are also many GPS software and methods to deal with the GPS data.Those GPS software can deal with the GPS data very well in many aspect, however, its also has some shortcoming and imperfect in practical application, For example, which can not deal with the actual situation and problems encountered in practical application.This paper will analyze the insufficient aspect of existing GPS data software and methods in specific applications, discusse the practical method for the GPS data processing.Following is the key elements:1. Baseline processing is the important step of GPS data processing,and the quality of baseline will significantly affect the quality of the GPS data.This paper will introduct the models of GPS baseline precessing and the influencing factors of the quality of baseline. And, some methods to weaken the factors are also introducted. Then, this paper introduct the estimation guild line of the baseline quality, and, the insufficient aspect of quality checking in GPS softsare is alse analysised.Fianly, automatic quality checking of baseline will be realized with a programming.2. The gross error of knows points have great influence on precesion in constrained adjustment of GPS network.This paper will discuss some methods about the adjustment of the compatibility of known poings,and the methods is feasible with example verification.3. Some GPS height fitting models will be analysised and compared, and some conclutions are obtained:mobile interpolatiom is the best models, by which, we can get the results of high accuracy.4. The best method of ssubregional fitting base on mobile interpolatiom and graphic interface is also analysised, and some conclution are obtained:1) The method of ssubregional fitting based on mobile interpolation is necessary for GPS height fitting.2) The best methods of GPS height fitting is to choose the best fitting radius for each awaiting fitting point.3) Let the awaiting fitting point in the middle of fitting windows. 5) This paper will analysis the insufficient of GPS data software in fitting of GPS height.Then, the GPS height fitting system will be developed by vb and MapObjects software based on mobile interpolation and graphic interface, which is convenient for users.