Web-based access to distributed high-performance geographic information systems for decision support
Proceedings of the 32nd Annual Hawaii International Conference on Systems Sciences. 1999. HICSS-32. Abstracts and CD-ROM of Full Papers
A n umber of applications that use GIS for decision support can potentially be enhanced by the use of highperformance computers, broadband networks and mass data stores. We describe our e orts in integrating together these powerful resources to provide useful services to Web-based clients for applications including environmental analysis for agricultural planning and land management; analysis of satellite and photo-reconnaissance images for national defence; and emergency services planning and
... vices planning and response. Many decision support applications that manipulate spatial data involve operations on very large data sets internally, which m a y require the use of high-performance compute servers, but carry out data reduction operations to provide summarised information to the end user. We h a ve i n vestigated the consequences of connecting high-performance resources together with broadband networks, but providing user access at the modest network capabilities of a modem link via the World Wide Web. A range of technologies exist to manipulate spatial data and to integrate modules together. We focus on Web, Java and CORBA technologies and discuss the issues we have encountered in implementing prototype distributed geographic information systems incorporating active" digital libraries, which provide remote data processing as well as remote data access. We h a ve experimented with large online image repositories such as for earth observation satellites, as well as other sources of geospatial data. Client server computing, particularly over wide-area networks, is not yet widely used for GIS applications and research, but we believe it has great promise in systems such a s w e describe.