• Move around pointing the phone at the ground until it has detected the floor and calibrated.  Make sure it is a flat surface with texture and lots of light.
  • Define all the corners of the room.  You can measure through cabinets and other obstructions.
  • Add attached small rooms like closets and pantries
  • Define ceiling height 
  • Mark doors and openings and define their height
  • Mark windows and other wall detail

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