Lecture08 Mobile Positioning and LBS 第 8 讲 移动定位与服务. §8.1 LBS Basics §8.2 LBS Technologies §8.3 Mobile Positioning §8.4 Geographic Information System. Location Based Services (LBS). What is it? Allow you to report real time current location to a given platform
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§8.1 LBS Basics
§8.2 LBS Technologies
§8.3 Mobile Positioning
§8.4 Geographic Information System
Geographic Information System
The satellites constantly broadcast signals that can be read by GPS-enabled devices.
Line of sight : suitable for outdoor only
Signal leaves satellite at time “T”
T + 3
Signal is picked up by the receiver at time “T + 3”
Distance between satellite and receiver = “3 times the speed of light”