The development model of a GIS application system

How to deal with the relationship between GIS and normal management system is one of the most frequent problems that the developers meet when they are developing application system by using GIS. The reason is: the users have already had their own database or management information system before GIS, and the GIS developers always put all of the exiting data into the management of GIS but they always concentrated on GIS without concerning the different levels of the users. But, because the database function of many GIS softwares is very weak, it is difficult to achieve the task of managing normal database, which created some difficulties for developing the system. In addition, only a few functions of GIS have been used, even if all the exiting data have been put into GIS management. As a result, the cost of developing increased. Focusing on this problem, the authors proposed three developing models which combined management system with the advantages of GIS and based on analyzing users' demand in this paper. The authors also introduced the key techniques during developing this kind of application system in this paper.