The GIS-T web services can provide the hosted spatial data and GIS functionalities that can be accessed and integrated into the different customized ITS applications. This paper presents the system design for building the Web GIS based intelligent transportation application system with GIS-T web service technology. The GIS-T web services are designed to perform basic geo-processing tasks, such as address matching, map image display, and routing, without maintaining GIS tools or the associated geographical data. The system architecture is designed as a multi-layer framework that integrates the web services, Servlet/JSP functions and GIS APIs based on the J2EE infrastructure.
A prototype of a Web-GIS transportation planning system is designed and implemented with the proposed GIS-T web service platform. Through the GIS-T web service, the hosted spatial data and GIS functionalities that can also be accessed and integrated to other different ITS application systems. It has an important application prospect in the Web GIS based ITS development and application.