aiming to search the World Wide Web for online geographic information to meet the end users needs
is totally a new research area in the field of spatial information sharing and geographical information system interoperability. In this paper we propose a prototype system of SISE based on the OpenGIS WMS specification. The system architecture
working principles
detailed function of each component
implementation strategies and system performance test results of this SISE prototype are introduced. This SISE prototype is capable of discovering available WMS Servers dynamically
saving and updating capabilities information of them into relational databases and maintaining necessary R tree indexes. For each spatial information request from clients
it can choose qualified WMS servers according to the request autonomously and fetching the matched geographical information for them from remote WMS servers transparently.