Thanks Steve, that's what I suspected, it looked like things were getting chopped off the map, mostly access ramps I've noticed so far.
I guess Dale Atkin (Ibycus) is using a different program then for his road matching, because these omissions don't seem to show up on the Ibycus map. I need to educate myself on what RoadMatcher does and how it does it. Marc. On Sun, Mar 21, 2010 at 1:53 PM, Steve Singer <[email protected]>wrote: > On Sun, 21 Mar 2010, Marc Provencher wrote: > > Hi all, >> I'm new here, pardon the newbie vocabulary. >> >> While comparing the OSM maps and Ibycus topo map for Alberta, Canada, I >> noticed that the OSM version is missing several highway ramps. >> > > <snip> > > > I'll be setting up a Linux box to contribute in the project in the near >> future, but in the meantime if someone could give me a few hints as to >> where >> to look to find the problem, that would be great. I suspect it's in an >> import phase somewhere, because I though that OSM and Ibycus were both >> based >> on the same original data (Geobase?). >> > > The technique used to try and limit duplicate roads during the imports for > Alberta & Ontario sometimes would result in missing small connection type > roads such as ramps being excluded. When I ran RoadMatcher against the > existing OSM road network and the GeoBase road network often it couldn't > determine if some roads were a match or not. > > > > > >> Thanks in advance, >> >> -- >> Marc Provencher >> [email protected] >> >> > -- Marc Provencher [email protected]
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