这是3月份OReilly Where 2.0会议上Twitter介绍自己LBS功能和实现的幻灯片
http://www.slideshare.net/raffikrikorian/handling-realtime-geostreams-3597425
Handling Real-time Geostreams
View more presentations from Raffi Krikorian.
都封了，越封越傻逼，封封更傻逼。
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