Core Location

Core Location powers one of the nicest iPhone SDK features. This service returns (approximate) on-demand geopositioning with latitude and longitude data for iPhones and iPod touch units without built-in GPS and (pinpoint-precise) positioning for those units with GPS. Adding location to applications opens up a whole new programming arena where your computer becomes as important as what you compute. You can meet up with friends, search for local resources, or provide location-based streams of personal information.

Core Location enables applications to hook into location-aware social networking and data storage sites like fireeagle.com, outside.in, upcoming.org, twitter.com, and flickr.com. It lets you provide geotagged content or request local resources such as restaurant and events listings. With on-demand geolocation, mobile computing takes on new meaning and opens a wide range of Web 2.0 options.