The document discusses location tracking APIs available on iOS devices, including Significant Location Changes and Region Monitoring. Significant Location Changes allows detecting location changes of 300-500 meters on iPhone 3GS and later, while Region Monitoring allows monitoring when a device enters or exits user-defined areas and is available on iPhone 4 and later. Examples are given of how to
![バックグラウンド位置取得について](https://cdn-ak-scissors.b.st-hatena.com/image/square/364a5e10c5a2375ed3f5bc875f5cfd07b243e298/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Frandom-100912070436-phpapp01-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)