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Demonstration of dissemination, storage, and retrieval of Defense Mapping Agency digital products over a distributed enterprise network

As the Defense Mapping Agency moves from a producer of hardcopy products to a data warehouse of geospatial products providing the user with the most current information accessible on-line, the architecture will migrate to a distributed set of massive databases connected via high speed local area and wide area networks and accessible by remote users to efficiently query, locate, and move the data of interest to them. A demonstration of a prototype system that incorporates some of the technologies that will be key to the development of the DMA future architecture was run in July of 1994. A remote client with a one meter very small aperture antenna (VSAT) was used to remotely access, via commercial satellite link, the data warehouse consisting of a nationwide set of distributed servers connected via asynchronous transfer mode (ATM) commercial communications links. The demonstration scenario simulated a `take and update' situation where a user has been deployed with geospatial data on CD-ROM and is able to access and download updates to the region of interest via satellite link. The user is also able to provide update information via upload to the central location and is able to collaborate with operators at the central location as to the details of the input from the remote site.