Vector Data

• Vector Data – a collection of abstract features (point, linear, areal)

  • Spot elevations & contour lines
  • Road, rail, drainage, & utility networks
  • Vegetation and soil classification
  • Cultural features – buildings, industrial facilities, transportation facilities, etc.

• Vector Data Sources

  • NGA’s Vector Product Format (VPF)
    • VMAP/UVMAP – features extracted from scanned maps
    • VITD – features extracted from 1:50,000 TLMs & overlays
    • FFD/MSDS/DTOP – features extracted from stereo imagery
  • USGS Digital Line Graphs (DLGs)

• Topology is a mandatory component of vector data in SEDRIS

  • Location information is stored within the feature topology objects
  • Topological relationships support efficient terrain reasoning computations (e.g., route finding), and helps to maintain the consistency of vector data

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