Hi John, I like things like this; I'm not sure if I've got anything useful for you, but happy to talk about it. I think that routing would be a good place to start testing.
For example, in 2009 OSM reported that it was a 7298 km drive from Cape Town to the Kenya / Ehtiopia border. In 2010 this was reduced to 6666 km: http://blogs.thehumanjourney.net/finds/entry/route_finding_across_a_continent Now it comes back as 6051 km: http://www.openstreetmap.org/directions?engine=graphhopper_car&route=-33.9157%2C18.4257%3B3.5190%2C39.0547#map=4/-22.55/19.42 According to OSM, the driving distance is roughly 17% less today than in 2009; I would imagine that the reduction in distance represents both the building of new physical infrastructure and an improvement in OSM data. Routing is a really easy way to look for problems in OSM, such as: https://twitter.com/iknowjoseph/status/567719622070525953 So if you're interested in specific areas, I would suggest creating a route and looking to improve mapping along it. Long term, we could think of ways to conduct this analysis more systemically. I would like to experiment with something along the lines of: 1. Daily dump of OSM's Africa data 2. Create 100 start points and 100 end points 3. Daily create routes from each start to each end point 4. Log / graph distance of each route 5. Display each route on a map, coloured by change in daily route distance Does anyone have a spare server? :) Cheers, Joseph On 2 November 2017 at 21:27, john whelan <jwhelan0...@gmail.com> wrote: > If you look at many parts of the map in Africa you can see squares of > activity. Often HOT projects but there are many many places where a > tertiary or higher classified highway is fifty meters or less from > connecting to another highway. > > I seem to recall in Ghana they had a project to just map the major > highways. This is pure infrastructure, it isn't exciting like mapping > buildings but I suspect it would make the map a lot more usable if we could > connect up a few more highways and I'm not even sure how you could detect > them. > > Thoughts? > > Thanks John > > _______________________________________________ > HOT mailing list > HOT@openstreetmap.org > https://lists.openstreetmap.org/listinfo/hot > >
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