Web GIS Service Component Based On Open Environment

Web GIS (Geographic Information Systems) service systems provide the various GIS services of analyzing and displaying the spatial data with friendly user-interface. But, early systems don’t support open environment and interoperability. It is difficult to access diverse data sources, which provide each spatial data format. And, these systems have the difficult of upgrading the function and reducing the cost of developing web GIS application. In this paper, we design and implement the open web GIS service system based on the web GIS architecture of OGC(OpenGIS Consortium). This system provides the inter-operability, open environment, and spatial data transfer format based on XML. In addition, it satisfies the various userrequirement and the re-usability of the developed software because it supports web GIS services as components. Each service component is composed of many objects accomplish the atomic service processing and cooperate with each other. Web GIS service components are designed with UML (Unified Modeling Language) of an objectoriented modeling language for specifying, visualizing, constructing, and documenting the artifacts of software system. In addition, they also were developed in object-oriented computing environment, ATL/COM and Visual C++, and it provide the interoperability, language-independent, easy developing environment as well as re-usability.