Design WebGIS Using UML

UML is a set of standard graphic modeling language,with characteristics of visualization, assignation, creation and document.It is a standard expression of Object-oriented analysis and design.WebGIS application set convently porpulor for its system designers think that WebGIS has more advantages than traditional GIS.Besides,more and more WebGIS developed tools promote WebGIS application. With further application of WebGIS, WebGIS sets more complicated.So system design and model is necessary to WebGIS application. Software engineering technique and management problem outstanding that WebGIS software engineering shall be urgently improved.The paper attempts to using UML construct and realize a WebGIS application system.In phase of system analysis and design,use UML visually express whole system.Finally,use ArcIMS4.0 realize the whole system. The paper consists of six chapters.The first chapter introduces concept , characteristic and actuality of WebGIS. Describe system strcuture and develop trend and down to date application of WebGIS in actuality.The next chapter analyse and compare two realization patterns and five prevalence technique of WebGIS.The third chapter expatiate Unified Modeling Language(UML) in detail,from its concept, characteristicto concrete content.Stress to analyse superiority using UML to deal with WebGIS issues In the same time,construe the main content of WebGIS modeling.The fourth chapter is the center of paper. Base on analysing modeling process of UML. then using UML to design two realization patterns of WebGIS.Finally,attain visible expression of two realization patterns of WebGIS.The fifth chapter based on the fourth chapter,design a prototype system--"Changle ecology function plan web information system based on WebGIS".The sixth chapter summarizes the whole paper and generalizes the research effect and insufficiency,innovation point and the direction of the next step of the work..