Information Services and Systems (DISS)
Access Through Catalog Searches
three prototypes provide access to catalogs of information
of various kinds. They also demonstrate how tools for data
discovery, visualization and access can be implemented to
provide interoperable access across multiple systems in the
search and retrieval of data and/or metadata.
Data Portal through the Canada Centre for Remote Sensing
This Data Portal uses parts of the International Directory
Network (IDN), customized to meet the requirements of GOFC-GOLD
scientists. The portal allows users to browse the directory
and search several distributed databases.
Free-Text Portal through NASA/GSFC
This free-text search portal allows the user to retrieve data
sets that contain words or phrases specified by the user that
can appear anywhere in the data set description. Since words
or phrases can appear anywhere in the text, results may not
be specific to the words queried by the user. Users can use
a pull-down menu to restrict the search to specific fields
within the metadata descriptions; for example, restricting
the search to just the title or the summary will increase
precision of the search. Boolean (AND/OR) operations are supported.
Keyword Search through NASA/GSFC
The GOFC-GOLD keyword search portal represents a virtual subset
of the IDN collection that contains the data sets for the
particular portal requested. The keywords represent a set
of controlled Earth science keywords, in a three-tier hierarchy,
that are used to index the metadata records. Searching on
a known set of words can lead to more precise search results.