The Golden Gate Bridge.
California landmark and vital transportation link, the Golden Gate Bridge serves to separate the San Francisco Bay from the Pacific Ocean. Walking out to the tower nearest the San Francisco side, I tested the iPhone. The location feature placed me not on the bridge, but in the chilly Bay.
The real world iFaux GPS difference: Approximately .4 miles and wet.
San Bruno Mountain in Brisbane, California.
My next destination has little to no cell coverage and I could not make a call while testing. In fact, it took a few tries to secure adequate Web access to even get a location. Where the iPhone located me should give pause to anyone planning on using the iPhone as a GPS substitute while hiking.
The real world iFaux GPS difference: Approximately .6 miles.
Neighborhood in Oakland, California.
I picked up a friend in Oakland, California. My friend lives in a residential area near Interstate 980. According to Google Locations, he doesn't just live close to 980, he actually lives in the west-bound fast lane. He's thinking about moving.
The real world iFaux GPS difference: Approximately 650 feet.
The Google campus in Mountain View, California.
It's Google's software, so they should be able to find themselves while at work. After checking out the multi-colored building and a few electric cars, we tested at an intersection used by the Google employees on a daily basis. Not surprisingly, the location I was given was only across the street.
The real world iFaux GPS difference: Approximately 100 feet.
freedom8707
February 09, 2011 at 2:58am
Or you could just download Location Spoofer on iPhone. Works great for me!
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Anonymous
January 30, 2008 at 6:19pm
As has been said already the real useful part for me is "the next step" where I can use the "found" info to help get me to my next destination. I have tested it on major highways and on country roads and I found it is faster and a bit more accurate in town but for my needs I find it awesome! I love my iPhone more everyday.
smokeonit
January 29, 2008 at 2:39am
google maps wps in germany is varying like in your results... depending on haow many cell towers and wifi hotspots are picked up.
i had hits as precise as 10feet, 3m, and as far way as .6miles, 1km....
Kim Hill
January 28, 2008 at 9:18pm
Around my neighborhood (Greenwich Village/NYC), it's typical accurate to within 30-80 feet - impressive. But at the NYC Googleplex tonight, it showed a gigantic probability circle that I normally see only if I turn off WiFi. Weird.
Stephen
January 28, 2008 at 7:12pm
I think you can't generalize how well it works based on tests in Apple and Google's backyard (literally). I did some testing myself, and am pleased with the system, but wouldn't say it's anywhere near .5 mile accuracy in general! Right now it pinpoints me about 4 miles away from where I'm sitting - not even in the "blue circle".
Mark Cogan
January 28, 2008 at 6:59pm
You say you "used the iPhone Maps Location feature to locate me (blue pin)". But I think what you actually did is to drop a blue pin at the center of the circle displayed by the Location feature. The Location feature isn't saying that you are located at the center of the circle; it's saying that you are *somewhere within* the circle. Smaller circle, better guess. Stated another way, the data type that the nominal "Location function" returns isn't a point, it's an area.
So it's only accurate to say there's a "difference" between your actual location and the approximation returned by the Location feature if your actual location is outside the area that the Location feature said you were in. In every case where you showed the Location circle, that wasn't the case -- so the Location function was 100% accurate in those cases.
Still: cool tests!
Anonymous
January 28, 2008 at 6:01pm
It's not a huge surprise to see that dense commercial areas would have the best results. More wifi, more cell towers to triangulate with. Being in a residential area, or next to a large body of water where the wifi and cell towers are all on one side, makes triangulation more like obfuscation.
RayCon
January 28, 2008 at 5:04pm
I was recently driving from Florida to Minnesota, and somewhere in Georgia I required some good coffee, not from one of the machines at the rest stops on the interstate. My wife used my iPhone to pinpoint our location and then typed in Starbucks. Sure enough, there was one a half mile east of the next exit. That was a lifesaver!
Anonymous
January 28, 2008 at 11:29pm
But I thought you wanted good coffee?
Anonymous
January 29, 2008 at 3:22am
Out and about in London, my phone typically gives me a 5 mile radius. Every now and then it gave me something closer but still a huge radius.
Meanwhile, my buddy standing right next to me was able to get something down to the street level. And if we walked 20 feet down the road and pressed the little button again, the little circle would move correspondingly.
So, can you imagine going into an Apple or O2 store saying, "My faux-GPS locator thingy is not as good as his ... please fix it."
Still I would love to know why his works and mine does not.
Steve
January 28, 2008 at 11:19am
Generally I know where I am on the map.... It's been pretty good at locating me, certainly close enough that I can easily fine tune it.... The real benefit for me has been the next step.... After it's located me (and I've fine tuned it) it's been really nice for getting me to the next place I want to go... It's no Garmin, but it does the job pretty well.....
Eleventeen
January 28, 2008 at 9:45am
I'm guessing for this you had the Wifi enabled? Or are there so many towers in San Fran that it's easy to triangulate down to such a close margin?
I've found that where I live, half the time, having the wifi turned on stalls out the location finder, turning it off instantly gives me a location but with a wide radius.
On a recent trip on the interstate thru a section of the Florida panhandle which could only lovingly be called 'sparse', the location circle was perhaps 5 miles wide, a good 10 miles off, and on the wrong interstate even.
