ERS “Datum” Transformations

• Horizontal Datums

  • Still no transformation support
    • Planning for 3-parameter Molodensky implementation

• Vertical Datums

  • WGS 84 Geoidal separation now calculated (scalar)
    • MSL and WGS84G are treated as identical
  • Transformations now supported for:
    • WGS84E ? WGS84G
    • WGS84E ? MSL
    • Automatically loads full ERM data (~ 10 MB)

• Ellipsoids/datums definitions, and associated transformations based on:

  • “Department of Defense World Geodetic System 1984”, National Imagery and Mapping Agency, Third Edition, TR8350.2, 1997.

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