Design And Implementation Of The Gis Map In The Symbol Editor

The Map Symbol Base System is one of the basic functions of Geographic Information System.As a basic research,it developed rapidly with the development of Information Technologies.Under the guidance of the map symbol and software developing method theories,using the thinking of "Design Pattern",this paper put forwards a design method of the two dimensions symbol editor.lt is researched from the theory to the practise.The topics of this paper as follows:1 This paper not only discussed the question of symbol design system,but also discussed the background and contexts of research based on the map symbol theory and the researching actuality2 By introducing the background of map symbol base's technology ,this paper puts forward a feasible developing method and introduces some developing tools,such as Unified Modelling Language,Rose etc.3. Quoting the concept of "Design Pattern",this paper introduces the design principle which is the foundation theory of "Design Pattern" and the applying of "Design Pattern" in the symbol editor.4 Based on the theories puted forward above and the design goal of the symbol editor,this paper introduces a series of designs and implements such as the data model of symbol objects,the structure of system.