VRFVector relational format. A relational model-based format very similar to the DMA VPF (Defense Mapping Agency Vector Product Format).
Visual Flight Rules; Vector Relational Format
VGA
Video Graphics Array; Video Graphics Adaptor ...
Defense Mapping Agency for the distribution of its vector data sets. ArcInfo includes a bidirectional VPF translator. VRF Vector relational format.
 See also: Network, Geographic, Attributes, Control Points, Operating System
  
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