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From: James hotmail on 12 Nov 2009 08:33
Hello All,

I am playing with a GPS application. I have a database of gps positions and
would like to know how you go about matching these records with the current
position. An exact match is not good enough. Also, having the ability to
show/update the user on status - your 5 blocks away, 4,3,2 and 1 block away.
Lastly, provide some guidance, like "Head North", "Head East" etc.

Is there a good book or website that discussing this type of math?


-James

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