With the new firmware update of the iPhone Google maps now have a "locate me" feature that relies on a combination of triangulation by cell-towers (mobile phone towers) or WiFi accesspoints. It's not quite GPS, but not bad. IMHO it works pretty well, and seems to find my position with decent accuracy when I'm in a area with lots of access points, less so when I'm in the countryside - as expected.
But MacLife has done some decent testing in San Fransisco, which is quite valid for the UK as well.
iPhone firmware 1.1.3 brought Google Location's cell tower and Wi-Fi triangulation to the mobile device. When Steve Jobs demoed the technology at his annual Mac Expo Keynote, he exclaimed, "It's going to locate me right on the map. Zoom. That's cool."
We decided to see how "cool" the Enhanced Maps feature truly is with a real world test. Armed with an iPhone, digital camera and a car, I drove to various Bay Area landmarks to see just how well the iPhone, with updated Maps, could find me.
The testing process I used was simple:
• I arrived at a location. Using the iPhone's Maps, I then tried to pin-point my exact location on my own, without using the iPhone's locator;
• In the map, I dropped a pin (red pin) and created a bookmark of my location;
• I used the iPhone Maps Location feature to locate me (blue pin).
• I then figured out the difference between the two points. The distance stated between to the two points is "as the crow flies," a straight line between the two points.
In the following images, the first map is my actual location, the second is my location as determined by the iPhone, and the third is the distance between those points
[From iFaux GPS Put to the Test- MacLife]
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