I don't think that, what was first, is always relevant. Your cycleway
'tunnel' is a bridge. A tunnel has to go in depth or under a lot of
other things (not a simple crossing).
A bridge is in general less thick then the height of the passage.
Or the height of a tunnel is less than half the level difference.
Regards,
Gerard
Tim Couwelier schreef op 2019-05-28 09:28:
> I'll agree with everyone else on the given selection here.
>
> As for how I try to decide:
> Ideally, you'd have the history of 'what came first'. Whichever level this
> one is at goes as the 'baselevel'.
> Either a new road / railway / .. goes:
> OVER it, making that a bridge
> UNDER it, making it a tunnel
> AT THE ORIGINAL LEVEL, making the existing road/path a bridge or tunnel based
> on how that got adjusted.
>
> That makes this a railway-bridge:
> https://www.google.be/maps/@50.9501557,3.1304248,3a,60y,255.18h,91.97t/data=!3m6!1e1!3m4!1sV8dGdG1hKMYxX3JldKdTSA!2e0!7i13312!8i6656
>
> But this, just a bit further, and at the same level as the road shown in the
> previous example, a tunnel for cyclists:
> https://www.google.be/maps/@50.9516067,3.1299799,3a,48.9y,281.94h,86.62t/data=!3m6!1e1!3m4!1sPooi08Nvz-feFB6XzaibnQ!2e0!7i13312!8i6656
>
> Hope that makes sense, I personally feel it matches with how people tend to
> label things.
>
> Op di 28 mei 2019 om 00:04 schreef Pieter Vander Vennet
> <[email protected]>:
>
> Cool collection of bridges (except #2). I too think that if its not dug, it's
> not a tunnel.
>
> I have another cool example, not from belgium though:
> https://www.google.be/maps/@45.5067122,6.6792676,3a,75y,267.08h,77.06t/data=!3m6!1e1!3m4!1stJwtCeCLHlLxMPnVB_ZYdw!2e0!7i13312!8i6656?hl=nl
>
>
> This view is on a bridge (over a small valley) which acts as ski piste (in
> winter), and continues through a building (which has a ski piste on top).
>
> Met vriendelijke groeten,
> Pieter Vander Vennet
>
> Op ma 27 mei 2019 om 22:44 schreef GeDeOn . <[email protected]>:
>
> Hi Stijn and all
>
> In my opinion, a tunnel is something that was dug, in a hill or in mountain,
> under a river, ...
>
> Otherwise I would think of a viaduct.
>
> In that regard only your case #2 is a tunnel.
>
> Just my 2 cents...
>
> Pierre
>
> Envoyé depuis mon smartphone Samsung Galaxy.
>
> -------- Message d'origine --------
> De : Stijn Rombauts via Talk-be <[email protected]>
> Date : 27/05/19 20:57 (GMT+01:00)
> À : OpenStreetMap Belgium <[email protected]>
> Cc : Stijn Rombauts <[email protected]>
> Objet : [OSM-talk-be] bridge or tunnel?
>
> Hi,
>
> 1. This is a bridge: no doubt.
> https://www.google.be/maps/@50.9628551,5.0810297,3a,75y,328.21h,89.12t/data=!3m6!1e1!3m4!1sXz43z9vWyUiOpCVTschIUQ!2e0!7i13312!8i6656?hl=nl
>
>
> 2. This is a tunnel: sure enough.
> https://www.google.be/maps/@50.6138142,5.5973887,3a,75y,97.64h,84.03t/data=!3m6!1e1!3m4!1sRvKwojNbhvMdSBWG3zViLw!2e0!7i13312!8i6656?hl=nl
>
>
> 3. This looks like a tunnel, no? Or is the fact that the railway is on an
> embankment enough reason to make it a bridge?
> https://www.google.be/maps/@50.5508531,4.7216376,3a,89.9y,51.8h,87.45t/data=!3m6!1e1!3m4!1s4GoklQWnN5bW6ugdo1grmg!2e0!7i13312!8i6656?hl=nl
>
>
> 4. This one looks more like a bridge:
> https://www.google.be/maps/@50.5923923,4.6668939,3a,75y,57.67h,80.29t/data=!3m6!1e1!3m4!1s4y-C9gvI9ZsUk9jcNQX4eA!2e0!7i13312!8i6656?hl=nl
>
>
> 5. And this? Brunnel or tidge?
> https://www.google.be/maps/@50.5214486,4.8868137,3a,75y,27.85h,81t/data=!3m6!1e1!3m4!1sx0n9EuFTEx27S4sCQ--GPg!2e0!7i13312!8i6656?hl=nl
>
>
> 6. And if it gets shorter?
> https://www.google.be/maps/@50.5317414,4.9485687,3a,75y,39.18h,91.35t/data=!3m6!1e1!3m4!1sdTd6puiPIvGKsLBzeCzB6Q!2e0!7i13312!8i6656?hl=nl
>
>
> 7. And this?
> https://www.google.be/maps/@50.8660892,4.3648486,3a,75y,333.02h,85.73t/data=!3m6!1e1!3m4!1swvUHgLYhl8R5IXGVJ2QWiQ!2e0!7i13312!8i6656?hl=nl
>
>
> 8. A bit more complicated: not only a railway, but also the platforms on a
> bridge? Or above a tunnel?
> https://www.google.be/maps/@50.8101922,4.3991964,3a,75y,63.96h,87.57t/data=!3m6!1e1!3m4!1s2ioHz72P7Ju0aTcMLalGKg!2e0!7i13312!8i6656?hl=nl
>
>
> 9. And if you turn around:
> https://www.google.be/maps/@50.8101922,4.3991964,3a,75y,258.54h,101.02t/data=!3m6!1e1!3m4!1s2ioHz72P7Ju0aTcMLalGKg!2e0!7i13312!8i6656?hl=nl
>
>
> I am curious about your opinion...
> But of course, what those things are, is not really the question. How should
> they be mapped? That's the question.
>
> Regards,
>
> StijnRR
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