UCDM
United States Imagery and Geospatial Information System (USIGS) Conceptual Data Model (UCDM)
The Department of Defense directed its agencies, through DoD Directive
8320.1, to standardize data elements in use by DoD systems. This directive
also established the DoD Defense Data Dictionary System (DDDS) as the central
repository for these standard data elements and data entities. The DoD recognized
the need to populate the DDDS with standard Mapping, Charting and Geodesy (MC&G)
data elements. The National Imagery and Mapping Agency (NIMA) volunteered to begin
this process by modeling the structures presented in the Feature Attribute Coding Catalog
(FACC). The FACC is part 4 of the Digital Geospatial Information Exchange Standard
(DIGEST), an international exchange standard that is the result of almost 20 nations
collaborating to define a coding standard for MC&G features and attributes. (The group
responsible for the FACC is the Digital Geographic Information Working Group (DGIWG).)
The modeling of geospatial features and metadata began in late 1993. Collaborative sessions
were and continue to be held with the participation of a wide array of DoD, civilian agencies,
international and commercial partners. The IDEF1x models that were produced from these
sessions collectively comprise the United States Imagery and Geospatial Information System
Conceptual Data Model (UCDM.) This UCDM provides the USIGS Community with a data
architecture for attaining interoperability and maximizing the usefulness and interchange
of imagery and geospatial data.
See: http://164.214.2.59:80/org/se/seid/usigs.html