Marc, The way to do this would be to overlay NGI data with our data. You could do like frutellake did and check total length in squares of 1 km². Or you could do it more properly using a data conflation tool. With something like FME I would try to find a partner road for roads that exist in NGI. In case there is no match, that would warrant closer inspection. When a road is of a completely different type in NGI and our data, that would warrant a check too.
I did this in a purely visual way with Wegenregister, which is mostly NGI but only Flanders, and there were places where NGI was more complete - and places where we are more complete. 2015-11-12 11:27 GMT+01:00 Marc Gemis <[email protected]>: > > On Thu, Nov 12, 2015 at 9:43 AM, joost schouppe <[email protected]> > wrote: > >> if only to check for missing roads in our map (especially the "slow >> roads" still need work in Belgium). > > > You have to be careful with this. People are now drawing cycleways and > sidewalks next to main roads. This means that the number of slow roads is > increasing, while they are not really missing. > > That does not mean that we have all the slow roads yet (paths & tracks) , > but does anyone else have all of those (so we could compare) ? > > > regards > > m. > > _______________________________________________ > Talk-be mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-be > > -- Joost @ Openstreetmap <http://www.openstreetmap.org/user/joost%20schouppe/> | Twitter <https://twitter.com/joostjakob> | LinkedIn <https://www.linkedin.com/pub/joost-schouppe/48/939/603> | Meetup <http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/> | Reddit <https://www.reddit.com/u/joostjakob> | Wordpress <https://joostschouppe.wordpress.com/>
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