...materials
Work reported in this paper is supported by funding from NSF, ARPA, and NASA under NSF IRI94-11330 and by product contributions from the Digital Equipment Corporation.
...facilities
The ADL Project involves a consortium of universities, public institutions, and private corporations headed by the University of California at Santa Barbara and jointly sponsored under the Digital Libraries Initiative of NSF, ARPA, and NASA.
...[#FF95##1#]
A limited number of RPCD's are available.
...(WP)
The WP will be available to users with access to WWW by late 1995.
...processing
Owing to restrictions in space, there are many important aspects of ADL that cannot be discussed here, such as the issues of security, privacy, and copyright.
...defined
We use the term geographic footprint if the space over which the item is defined is the surface of the Earth.
...polygons
A point may be viewed as a degenerate class of footprint.
...DL
We note that the issue of object registration will probably not be resolved by the DL community alone, particularly in the case of spatial data.
...[#FF95##1#]
USMARC now contains the full FGDC standard.
...component
A more detailed discussion of this model is currently in preparation.
...gazetteers
The WP does not yet support automated procedures that extract the footprints of features from maps or images.
...instance
A footprint in a gazetteer is frequently a single point represented in terms of a latitude/longitude pair.

Terence R. Smith
Mon Jul 31 17:29:50 PDT 1995