Geotags.org > Bus Ads change with location
[cdharris] A new technology allows an ad-wrapped bus to change its ads as it changes its location. Now in test in London, the system automates message delivery in response to GPS location.
Some related posts from Technorati and Google.
[News.com.com] Skyhook says: Who needs GPS? | News.blog | CNET News.com: Here's how it works: Every WiFi access point (every Internet device, in fact) has a unique fixed-in-hardware machine identifier, which is transmitted whenever it is on. If you have a database of these AP identifiers and their physical locations, you can use the WiFi radio in your laptop or PDA to triangulate against that data.
[Reviews.cnet.com] Skyhook says: Who needs GPS? - Alpha Blog - alpha.cnet.com: Here's how it works: Every Wi-Fi access point (every Internet device, in fact) has a unique, fixed-in-hardware machine identifier, which is transmitted whenever it is on. If you have a database of these AP identifiers and their physical locations, you can use the Wi-Fi radio in your laptop or PDA to triangulate against that data.
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