Using this code as a starting point, you can build your own location-based service with your own data model.

以该代码作为起点，您可以使用自己的数据模型构建自己的基于位置的服务。

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Nearly half of those who noticed ads while using a location-based service took some action.

如果在使用定位服务时发现定位广告，近一半用户会采取行动。

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Coordinates that are Shared with software developers, AD networks and location-based service providers in return for free location-based mobile applications and geo-targeted ads.

用户和软件开发者、广告公司和定位服务提供商分享坐标信息，然后获得免费定位手机应用和地理定位广告。

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Unlike some Web-based phenoms, the location check-in service Foursquare has an obvious potential business model: local ads based on your geographic location, perhaps coupled with inferred interests from your previous check-ins.

FORBES: Foursquare's Dennis Crowley: It's Still About Growth, Not Ad Money (Yet)

Last summer, Boston-based Where, which runs a mobile ad network and location-based recommendation service, opened a development center in Croatia to supplement its 18-person U.S. mobile engineering staff.

WSJ: Mobile App Talent Pool Is Shallow

Upgrades to the SpareOnePlus include a location-based service which identifies the exact location of the cell ID, accessible through a free smartphone app, as well as audible numeric feedback which reads the number dialed and incoming calls aloud.

ENGADGET: SpareOnePlus adds location tracking, audio alerts, keeps the 15-year life on a single AA battery eyes-on