Research on Distributed Gis Based on Mobile Agent

With the emergence of more sophisticated distributed computing environment and wide spread acceptance and available of Internet and World Wide Web (WWW) technologies, a new generation of Geographic Information System (GIS) emphasizing on open architecture, distributed computing capability, mobility, interoperability, extensibility and intelligence has been receiving more attention over the past decade. Distributed computing mode based on mobile agent is a revolutionary mode that can overcome the innate limitations of the C/S or B/S mode. This paper presents an architecture of distributed GIS based on Mobile Agent to meet the new requirements of GIS applications under Internet environment with limited communication bandwidth and unstable connectivity. It analyzes the related technologies of distributed computing based on Mobile Agent: its architecture, accomplishment of agents’ move, and technological support for collaboration. And last it discusses GIS applications based on mobile agent on Internet. Our research on distributed GIS integrates several existing technologies, most of which are Java-based, and we also take Concordia as the platform to build our distributed GIS based on mobile agent. We have accomplished mobile agents’ move and collaboration based on Concordia. And the combination of Message Queue System, Proxy and Persistence Manager makes Concordia systems secure and reliable.