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SeekingAlpha article on GeoFencing

Just published in SeekingAlpha:

... GeoFencing, in a nutshell, enables an action to be taken when a device enters or leaves a specific geographical area...  But the big challenge with GeoFencing is implementing it efficiently and effectively...  Apple already offers, in iOS and OS X, its Core Location Framework that supports GeoFencing, among other location functions, for app developers. Apple has researched and patented a technology that they call multi-tier GeoFencing, whereby a phone monitors its coarse location easily and efficiently by cell ID until it gets close to a GeoFence, at which point it switches to GPS....

Click here to read this whole article, by Grizzly Analytics chief analyst Bruce Krulwich.

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