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Apple has a secret app in the App Store which allows some iPhone users to map the interior of a building using their handset. First discovered yesterday by developer Steve Troughton-Smith, an app called Indoor Survey has been available on the App Store since last week.
The software is currently hidden in the App Store and is not operational, suggesting that the official launch is around the corner.
— idownloadblog.com
The indoor positioning app "Indoor Survey", which allows users to pin their location on a map within a given structure, seems to also function as a mode of "crowdsourced Ground Truth" to improve Apple Maps' accuracy. As the app is still "hidden" and not searchable, the only way to download is... View full entry
