Statement issued 11/29/93:

User feedback of the DLG-E Model concepts or data content are
encouraged.  Questions, comments, or requests for additional
information can be forwarded to the address below.

          Mark Naftzger, DLG-E Program Coordinator
          U.S. Geological Survey
          500 National Center
          Reston, Virginia 22092
          FAX (703) 648-4706
          Mnaftzge@usgs.gov
  

DLG-E Sampler dataset caveat considerations:

   (1)  The Digital Line Graph - Enhanced (DLG-E) Sampler
        contains prototype datasets produced by the U.S.
        Geological Survey.  DLG-E is an enhanced version of the
        current DLG-3 spatial data model.  DLG-E is a new
        approach to structuring geographic data to more fully
        support increasingly complex Geographic Information
        System (GIS) applications and the many other diverse
        needs of spatial data users.

   (2)  Users of the DLG-E Sampler data are advised that the
        datasets include the full suite of DLG-E model
        components and constructs (as described in USGS
        Circular 1048, published in 1990).  Data collection,
        digital revision, and mass data conversion
        incorporating all the elements of the model is cost
        prohibitive at this time.  It is expected that the
        implementation of the DLG-E spatial data model will
        evolve over time to support more of the functionality
        in the original model design.

   (3)  The DLG-E Sampler datasets were produced to demonstrate
        a proof of concept for the DLG-E spatial data model. 
        In addition, the datasets were used to test the
        elements and functionality of the prototype production
        system.

   (4)  The USGS has elected to distribute the DLG-E Sampler
        datasets that include the full suite of model concepts
        in order to receive user feedback on the data model
        concepts and data content.