OpenStreetMap
I was attempting routing from Scunthorpe to Grimsby by bike, and Open Route Service sent me on a bizarre 200 mile route via Nottingham so I've gone over through the area looking for anything obviously wrong. I've fixed a few bits and pieces (mostly cosmetic), but it all looked routable so I've no idea what the problem is.
The entire area needs work, not just Grimsby (which was recently flagged as the worst mapped place in the UK). It's relatively flat so mapping by bike should be fairly quick, but there's a large area to cover and existing data to check (you know when you get the "that's got to be wrong" feeling). There are existing gpx plots, some of which I have added roads alongside today but others don't match up to existing data very well.
I might be tempted to spend a week camping in the area doing lots of cycling/mapping in a few months when it's warm enough.
Edit: Upon further investigation, Open Route Service appears to try and avoid highway=unclassified when routing by bike or foot. Or at least that's what it looks like is happening in this part of the country. Can't think of any reason why highway=unclassified should be avoided though, surely it would be more preferable to a busy main road for walkers and cyclists?
讨论
ndm 于 2009年01月29日 23:29 的评论
May be wrong -- but it looks like there's very few routes in to Grimsby without using a trunk route. Perhaps those aren't suitable for walking / bikes?
Cheers,
Neil
Circeus 于 2009年01月30日 04:23 的评论
This definitely looks like it. It's clearly highway=trunk that won't be routed through.
kaerast 于 2009年01月30日 10:00 的评论
OK, so if I do manage to visit this part of the country then I need to take a look at whether the trunk routes are suitable for cyclists and pedestrians. I'm not entirely convinced that's the only reason for bad routing, but it may be one reason.
⇄ john paul jones & gringo 于 2009年01月31日 14:40 的评论
Even if you choose a car with motorway - it goes in the wrong direction.
Back to the original route, it takes you on over the river Trent (wrongly) but having got to the other bank, there isn't another crossing point for miles, Gainsborough. By which time it appears to have lost the plot.
(I'm new to this site only having just discovered it ;) )
smsm1 于 2009年02月 2日 16:38 的评论
Maybe it's time for a mapping party in the Grimsby area?