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"Navizon is a software-only wireless positioning system that triangulates signals broadcasted from Wi-Fi access points and Cellular towers to help the users find their way in most major metropolitan areas worldwide." http://www.navizon.com/ But my original statement still stands... think about this... if Google Mobile LBS is designed to work with any Windows Mobile phone, how come the LBS doesn't work on the Mogul? Why? because as I previous stated, Sprint has either locked down the API that needs to be queried by the software, or they left it out altogether. My vote is for the latter since not even Sprint themselves sells LBS for this phone.... why wouldn't they if they could make money? Think about it... |
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As for the reason not every phone works with this service, that would be because the function in question is still in BETA status. Doesn't it strike you as odd that some Sprint phone work and some don't? If it was up to the carrier to allow the service, wouldn't it be all or none? |
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Read this news article and subsequent forum messages below it, hopegully it'll shed some light on what I'm talking about: http://www.phonenews.com/content/view/2086/9/ We can go around and around on this, you're going to believe what you want and I guess I'm going to believe what I want. Last edited by TC1; 11-29-2007 at 11:59 AM. |
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"How does Assisted GPS (AGPS) work? AGPS combines the accuracy of GPS technology, CDMA Network Triangulation (AFLT) and Cell Site Location Technology. This ensures wireless devices can be found with more reliability than traditional GPS services, even in the most challenging environments. Bell Mobility’s AGPS solution will first attempt to use GPS satellites to locate the Assisted GPS Ready wireless device (within 150m in most circumstances) and if unsuccessful will begin to fall back on a variety of network based location technologies. http://developer.bellmobility.ca/lbs/pre-index.asp You can go back and forth quoting all the theory you want, I'm talking about the real world application of the technology. |
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But Google Maps "My Location" is based on the device Cell ID, which on some devices is hard to get (e.g. all Palm OS devices--only one developer has ever been able access it, GreenHex--hence there are 0 Palm OS devices that work with this) and based on signal strength. Seeing as it is accurate to "within three miles of their actual location", these are not the numbers of aGPS, which is actually quite accurate. This is old school cell triangulation. http://www.al911.org/wireless/triang...n_location.htm The assertion that this is aGPS is flat out wrong. --Mal Last edited by Malatesta; 11-29-2007 at 03:20 PM. |
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aGPS may use triangulation (once again tri-lateration is the correct term here) but that doesn't mean all systems that use triangulation are the same as aGPS. If Google's My Location function was using full fledged aGPS then it's location accuracy would be much better than within 500-5000meters. http://gigaom.com/2007/11/28/google-my-location/ Even the worst estimates of aGPS accuracy are around 100-300meters. Within optimal conditions 10-30 meters can be achieved. See these links for references: http://www.nemerix.com/CN/technology/about_agps.htm http://www.nemerix.com/CN/technology/about_agps.htm I don't know why you keep bringing up mGMAPS. While the software has the same functionality goal, that doesn't mean the methods used are anywhere near the same. The topic of the thread is Google's new beta function "My Location". As for your quote from the Bell Mobility, it only proves my point. It is an aGPS chipset, that first uses GPS technology to locate itself, and then falls back onto network technologies. Therefore aGPS is not JUST triangulation. |
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And to put this to rest finally:
Watch Google's *own* video explaining how it works (go to 1:17 in...) http://www.youtube.com/watch?v=v6gqipmbcok It's cell tower triangulation! No aGPS! Discussion over! lol |
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