huh? So they have the lighting profiles of every public and private space indexe... | Hacker News

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		djb_hackernews on March 24, 2011 \| parent \| context \| favorite \| on: Bill Nguyen demo'd Color to and within a day had $... huh? So they have the lighting profiles of every public and private space indexed?

dsil on March 24, 2011 [–]

No, they (supposedly) use lighting and sound to see if two phones running Color at the same time in the same approximate location are likely actually in the same place.

For example, we could have the same GPS location while being on different floors of a building.

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