System Grids

based architecture to support access to both real-time and archived geographic data in Geographical Information System (GIS) Grids. We have built and tested Web Service version of OGC Web Feature Service (WFS) that can be used to provide archived geospatial data to various clients. Due to several performance issues described in this paper we have also built a streaming version of Web Feature Service for large data sets where high performance is desired. We also describe our work building a Sensor Filter Grid to process and serve real-time GPS messages over publish/subscribe messaging middleware. We describe several filters built for this purpose and discuss initial performance results. As an example of how we can couple scientific simulation codes with our Grid architecture we describe coupling of a scientific data analysis application with GPS streams