GIS-based Interactive 3D Visualization and Analysis on the Internet
نویسندگان
چکیده
This paper explores the use of World Wide Web (WWW, or simply Web) as a means of designing and developing a toolkit, GeoV&A, for interactive 3D visualization and analysis of existing 2D Geographical Information System (GIS) data. The toolkit is mainly composed of two parts. One is a 3D visualization tool and the other is a 3D analysis tool, including profile creation, viewshed analysis, volumetric calculations and other related functions. This toolkit is implemented by integrating Internet GIS and HTML programming under a client-server architecture. The client front-end of this toolkit residing with the standard Web browser provides several HTML forms for users to enter parameters, while the server back-end including a set of ArcView's Avenue programs processes the parameters, performs visualization or analysis functions and sends back the results to the clients. Both 3D visualization and analysis functions are carried out based on 2D GIS maps. The results can be interacted in both 2D map/graph and 3D Virtual Reality Modeling Language (VRML) formats. It is demonstrated that this toolkit adapts the current GIS 3D visualization and analysis capabilities to the increasingly popular Web environment, thus offering new opportunities for users to build applications that benefit from the integration of GIS and virtual reality technologies.
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