On 17/07/14 04:44 PM, Chris Peterson wrote: >> I have to disagree with that: >> scientists tested it out with a system called SmartLoc that does exactly >> that on a Samsung Galaxy S3 in Chicago, where the GPS connection is >> really bad because of the skyscrapers. >> And they got down to 20m accuracy in 90% of the cases which is really >> impressive and better than GPS. >> They used databases and analyzed the streets and the car behaviour so >> that they could say whether an acceleration was caused by a turn, >> changing lanes, a broken street or for example a bridge (wind). > > So SmartLoc would position the device in their Chicago map (probably on > a street) and then track the most likely paths based on acceleration > changes for speed and turning? That's pretty clever.
In the 80's, there was Etak System that did a navigation system using "dead reckoning" as a technique to determine the position of the vehicle. https://en.wikipedia.org/wiki/Etak https://en.wikipedia.org/wiki/Dead_reckoning This was long before GPS existed. FYI. Hub _______________________________________________ dev-geolocation mailing list [email protected] https://lists.mozilla.org/listinfo/dev-geolocation
