PREFACE

This document was prepared by the National Imagery and Mapping Agency (NIMA), Architecture and Requirements Office (AR). The intent of this document is to provide a common set of definitions and acronyms for the development and evolution of the United States Imagery and Geospatial Information System (USIGS). The items contained in this glossary have been collected from multiple sources which are listed in Section 1. Acronyms and abbreviations are given in Section 2. Definitions and descriptions are given in Section 3. In some cases the sources define the same term in different ways. It is expected that these multiple definitions will be addressed as this glossary evolves, but in many cases multiple definitions of a term may ultimately remain in the USIGS Glossary as a reflection of different uses or contexts of the term.

In addition to the many general terms contained in the USIGS Glossary, several terms have been collected from the USIGS Conceptual Data Model (USIGS/CDM) and asssociated logical data model (LDM) (e.g., Archive & Dissemination Logical Data Model (A&D LDM)) data dictionaries. While the intent of the USIGS Glossary is not to duplicate these data dictionaries in their entireties, many of the entity-level data dictionary terms are general enough in nature to warrant inclusion in the USIGS Glossary.

This USIGS Glossary is intended to be a repository of definitions rather than an authoritative source. The sources in Tables 1a and 1b are the origin of the definitions. Proposed changes to definitions in this glossary must be worked through these originating sources. The sources must then introduce the changes into the USIGS Glossary, via the point-of-contact listed below, to remain synchronized. Proposed additions to this glossary can be presented to the point-of-contact listed below, along with the appropriate source citations, and will be reviewed prior to release of the next edition of the USIGS Glossary. In addition, all USIGS documents that contain glossaries must synchronize with this glossary.

This is Revision A of the USIGS Glossary and supercedes the previous edition dated 6 November 1997.

Please refer questions or comments to:

National Imagery and Mapping Agency
USIGS Architecture Division (ARU)
Attn: J. Wesdock
Phone: 703-808-0739
Email: WesdockJ@nima.mil

Requests for hardcopies of the USIGS Glossary should be directed to:

National Imagery and Mapping Agency
USIGS Architecture Division (ARU)
Attn: A. Galassi
Phone: 703-808-0892
Email: GalassiA@nima.mil

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