A NEW METHOD OF BUILDING GIS APPLICATION MODEL BASED ON GRAPHICAL VARIABLES

摘要

Geographic information system (GIS) has become a very important tool used to implement the integration of complex application system and to complete various complex graphic processing. In general, GIS application is mainly relevant to a lot of complex graphic processing, so that how to develop an effective method to fast build GIS application model with the help of the graphic processing ability for guiding GIS application system implementation has been being a challenge problem in GIS application and research area. In the paper, we present a new method for the design and implementation of a graphic-oriented GIS application model. This method is based on a new design principle of GIS application model, which uses a graphic variable to construct various complex GIS application model. The model makes use of GIS graphic processing functions, graphic variable properties and relationships among those variables to implement the design of complex application system. Otherwise, we discuss also a typical example for showing how to construct a practical GIS application system based on graphic variable, which was used to implement scientific management of stored grain. Finally, this paper discusses the general method for designing graphic variable model and some key techniques.