GPS mapping coordinates to streets

Questions, answers, discussions related to IEEE ICDM Contest

GPS mapping coordinates to streets

Postby kpb » Tue Aug 17, 2010 2:14 am

I have a question rg the GPS data: is the mapping unique? More specifically, do the instantaneous coordinates (x,y) uniquely indentify a street the car is on? My impression is the opposite.

Example line from the test set:

10 4 23.7 52.1381 21.0335

This means the car is standing specifically in node

38202268 52.1381 21.0335

Subsequently, it can be assigned to one of two streets:

(38202268, 38202264) and (38202268, 38202276)

How should a situation like this be treated?
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Re: GPS mapping coordinates to streets

Postby Marcin » Thu Aug 19, 2010 11:10 am

hi kpb,
You're right, the mapping doesn't have to be unique. That's a real-world situation that GPS coordinates have limited precision.
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