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A Geodata Discovery Service provides a mechanism to:
- Search Metadata for Geodata; and
- retrieve detailed information (metadata) that describes
a geodata resource,
in order to evaluate its suitability to meet a need.
Geodata includes
all types of geographic (or geospatial) data entities. Examples
of geodata are:
- a collection of related geographic features, such as the
road network of British Columbia;
- a satellite image; or
- a collection of geodata products, such as a collection
of Landsat-5 images over Canada.
Currently, the Geodata Discovery Service is based on the
U.S. Federal Geographic Data Committee's "Z39.50 Application
Profile for Geospatial Metadata" or "GEO".
GEO is based on the ANSI/NISO Z39.50-1995 Information Retrieval
(Z39.50): Application Service Definition and Protocol Specification.
The GEO profile includes not only the specifications for Z39.50
search service, but also the specifications for the metadata,
as well as other aspects of a GEO-conformant server that apply
to the Geodata Discovery Service.
Complete
description (z39.50)
A new stateless version of the Geodata Discovery Service
is in development, and is intended to replace the existing
Z39.50 based service..
Complete
description (stateless)
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