[gps-talkusers] GPS and address accuracy issues
- From: "Michael May" <mikemay@xxxxxxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Mon, 5 Aug 2013 14:18:33 -0700
I have discussed the various aspects of accuracy before. GPS fluctuation is
one reason you may hear POIs continue to trigger even when you aren't
moving. The GPS signal wavers so as far as it is concerned, the position is
changing and information is announced accordingly.
In terms of the location accuracy of POIs, this too varies. If it is
geocoded based on its address, the location is theoretical. Other times
there may be a set-back included and the location is recorded at the actual
door.
Of course when users are recording points, they don't follow strict rules.
The hope is that the volume of recordings through Foursquare helps to even
out user variations. I don't think user recorded points are any more or less
reliable than commercially recorded ones and they can definitely be better.
Even when you record a point right at your doorway, its position may seem to
shift depending on the accuracy of GPS when you recorded it and the accuracy
when you play it back.
Given all these factors, it is amazing that locations are as good as they
are.
Mike
Michael May, CEO
Sendero Group, Davis California
Developers of accessible GPS
Sendero Phone: 888-757-6810, extension 101
Home Office: 530-757-6900
Email: MikeMay@xxxxxxxxxxxxxxxx
Sendero web: http://www.senderogroup.com
General GPS web: http://www.AccessibleGPS.com
Mike May Personal: http://www.CrashingThrough.com
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- » [gps-talkusers] GPS and address accuracy issues - Michael May