The authority also uses geofencing—dynamic, location-based digital zones—to trigger and automate those fees, "and this is all transparent through open data, " she said.

海事局还使用了地理围栏（一种动态的数字定位区域）来触发和自动计算这些费用。 她说：“通过公然数据，这一切都是透明的。”

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It isn't clear why the iPhone is tracking this data, although the possibilities for location-based features are endless - location-based advertising, geofencing apps, and so on.

iPhone为什么要跟踪这些数据尚不清楚，尽管定位功能应用充满无尽可能性——位置广告服务、地理围墙应用，诸如此类。

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Besides saving some plastic, the Passbook entry adds some worth through geofencing that reminds recipients to splurge if they're near one of Apple's steel-and-glass stores.

ENGADGET: Apple starts offering Passbook-enabled gift cards, may save our hides in holiday shopping

Now consider the myriad digital tech options we have at our fingertips: geofencing, social integration, digital coupons, crowdsourcing, crowdfunding, near field communication, GPS, location-based applications, real-time bidding and the Internet of all things.

FORBES: Think More, Think Local