![]() The chip's primary duty is to supplement or correct info given to E911 dispatchers, and so it probably doesn't get much better than differentiating one single family home from another. I think 10m with a phone is not impossible given that it is probably indoors or in a car, or while moving, and considering satellite lock comes and goes. And then as some posters here have said, vertical accuracy is still only about a third as good as horizontal. Licensed surveyors can get accuracy at the centimeter level only by using very expensive antennae (USD$10k range) and occupying the same point for hours, taking an average of thousands of readings. A-GPS Ambient light sensor Digital compass Proximity sensor Push buttons Trackball: Màn hình: At launch: AMOLED Later: Super LCD 3,7 in (94 mm) diagonal PenTile 480×800 px 254 ppi (0.38 Megapixels) 3:5 aspect ratio WVGA 24-bit color 1 ms response rate: Máy nh sau: 5.0-megapixel with 2X digital zoom, 2592×1944 max. Professional grade receivers such as Trimble's Nomad series can do 2-5m accuracy before post-processing, and 1-3m afterward, which requires downloading the points to a PC and correcting them based on satellite information received at nearby base stations, and that's with good satellite lock (perhaps 6 or more) and staying away from large vertical obstructions like trees and utility poles that deflect or block signals. Drop the "c" and you've got it about right.
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