How were you thinking it would work differently to a 'simple snap'?<br><br>Working with PostGIS, I snap to the nearest node (rather than edge), and then also record the distance and add this in to the total. Many commercial solutions (eg. Microsoft MapPoint) also do this: Record the distance to/from the closest road and add this in to the directions and distances.<br>
<br><br>Richard (M)<br><br><br><br><div class="gmail_quote">On Mon, May 9, 2011 at 10:39 PM, Stephen Woodbridge <span dir="ltr"><<a href="mailto:woodbri@swoodbridge.com">woodbri@swoodbridge.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi all,<br>
<br>
Sorry for cross posting this also on the OSGeo-Discuss list.<br>
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Do we have any good map matching code around? I looking for something that does more than simple snapping of points to nearest segments. I have read tons of academic papers and played around with some simple algorithms in postGIS. I have the road network loaded in pgRouting.<br>
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Is anyone working on this? or have a working solutions that they are willing to share.<br>
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Thanks,<br>
-Steve W<br></blockquote></div><br>