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VRFVector relational format. A relational model-based format very similar to the DMA VPF (Defense Mapping Agency Vector Product Format).
DIGEST is composed of standards for two digital geographic formats: ARC Standard Raster Graphic (ASRG) and vector relational format (VRF). ASRG is very similar to ADRG and can be imported into ArcInfo as an ADRG file with the ADRGGRID command.
OGDI drivers are already available for several geospatial formats such as VRF/VPF, ADRG, CADRG, CIB, DTED, CCOGIF, CEOS, Oracle SDO, GRASS, PAMAP, Arc/Info, DGN, DWG, DXF, USGS DLG-3 and USGS DOQ.
 See also: Interface, Transform, File format, Image, Raster
  
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