Community Research and Development Information Service - CORDIS


Worldwide Web (WWW) interfaces to databases referenced by geospatial and temporal attributes are a growing public resource for environmental, geographical information system (GIS) and space based data. Each system has developed its own specialized Web interface that best represents their particular database schema. These databases are then searched by a Web Browser typically via a map and time interface. The most prominent requirements of end-users is simple: they require to search for resources which relate to a spatial area, a certain temporal coverage, and perhaps one or more keywords. Only if sufficient information is found, is the user willing to explore the collection-specific retrieval facility. The HTTP based Geo-temporal Searching (HGS) protocol described here then defines a mechanism whereby disparate remote databases can be searched through a single standard HTTP interface. In addition HGS provides a Service Discovery layer allowing new servers to be advertized, and an Explain layer for expanded searching.

Additional information

Authors: BEST C, JRC Ispra (IT);VAN GULIK D, JRC Ispra (IT);KLEIH M, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Earth Observation Workshop: From Producer to User, Boulder (US), October 7-9, 1997
Availability: Available from (1) as Paper EN 41012 ORA
Record Number: 199711573 / Last updated on: 1997-12-09
Original language: en
Available languages: en
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