[postgis-users] R: match line with road segment

[searchelite]

P.Rizzi Ag.Mobilità Ambiente wrote:
> 
> If I undestood it well enough and you are trying to match 
> GPS tracked points upon a road system, you should be careful 
> about crossings.
> Where two roads cross, a GPS point may be nearer to the crossing road
> instead of the one the vehicle actually was.
> So you should ensure to somehow "stick" to the "correct" road.
> Maybe by calculating the azimuth of each individual two-consecutive-points
> segment and searching for the road nearest to the ending point 
> of the segment _and_ with the azimuth most similar to the segment itself.
> Obviuosly sometimes a vehicle actually turns into a crossing road,
> so you should also recognize that somehow and _don't_ "stick" in that
> case...
> 
> Bye
> Paolo Rizzi
> 
> 

Thanks for the idea paolo..yes i've been considered that case..thank you
again

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