... but Location is Not Enough

• The key in interoperability is not so much where you are, but what you can interact with …
  • Remembering that “what” includes both systems and components of the environment itself

• A complete SRM must address:
  • Direction (azimuth and elevation angle)
  • Range
  • (support for) Geometric intervisibility

• Location interconversions between common spatial reference frames  do not necessarily preserve these

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