Using geographical data browsers in a networked environment

摘要

The rapid development of spatial information technology has promoted a large variety of applications. The use of diverse,datasets in these applications has often been limited to single-platform analysis and distribution. Recent improvements in networking capabilities have led to the possibility of cross-platform access to geographical information and improved interoperability. To promote access to various databases and limit unsecured use of datasets across networks, spatial data browsers have been developed to allow simple analysis of data void of permanent update. Furthermore, applicable network configurations have greatly improved dissemination of views of existing data and individual use of distributed heterogeneous databases. Various user interfaces and networking applications can be combined to maximize data flow between storage media and data browsing software. This paper reviews the use of such distributed data browsing systems and the characteristics of platform-specific access and performance. Distinct discussions will review both geographical browser interface and networking services components. The selection of networking and software solutions was based on the development of a data browsing system for a twenty-user environment of mixed platforms (Unix, DOS, and Macintosh). Seventy percent of the user environment, however, was Macintosh-based.