Quote:
Originally Posted by ima80baby
you guys are still missing the point. i'm just giving a reason as to why it isnt compatible with the ipod touch. you guys keep commenting on how the iphone's gps works and the different types of gps this has nothing to do with my posts
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I think what your trying to say is that without a wifi connection (whether it be GSM or Wifi 802.11B/G) the device will not be able to download the actual map data and display it. But your missing what everyone else has been trying to tell you.
GPS and WIFI work separately. When you use a standard GPS device (say just a normal Tom Tom car GPS device). The map data is not delivered over a wifi connection. Its actually not transferred at all. The application or handheld device already has the current maps loaded but when it receives the longitude and latitude from the GPS satellite (I know its redundant to say that) the handheld device uses those coordinates to show where your at within 10 meters on the map currently already in the system.
Now, another part of your posts you talk about how the ipod touch is doing the location based services and you have to have wifi for that. That is true. But let me explain how that differs. When an app on the ipod touch says can I find your current location its actually polling what geo-information is loaded on the current IP address you have obtained. So for example if my ipod pulled an ip of 69.1.1.1 and the device polled the geo-information tags on that ip and it showed it was located in Jackson, TN then the program I am using would report back a general location within Jackson, TN. So if you load google maps on your ipod touch and it polls your current location all its actually doing is pulling where your IP is located and then downloading a general map for that location.
So now your probably saying yah that's what I meant you have to have a wifi connection for it to pull the map down to display it. Well no remember on a sophisticated GPS application like TomTom the maps are already loaded in the application, it just gathers from the GPS signal where your at and then displays the correct map.
Two separate technologies that work separately.