[Tagging] Railways along streets

Nick Bolten nbolten at gmail.com
Wed Apr 11 19:21:32 UTC 2018


One downside of mapping the railway on a separate layer is that
intersecting streets would be neglected, such as S Main St at the next
intersection. S Main St actually crosses the rail and some part of that
intersection should probably be tagged with info about the rail crossing
(i.e. they should share a node), but this would not be caught by QA /
editors with validation because different-layer ways are allowed to
intersect without sharing a node.

There's also potential for impacts on other features like footways that
intersect or ways that actually are on a different layer that now need to
be bumped up/down to avoid intersecting the rail.

François' suggestion seems like the most descriptive option in lieu of a
lane-like standard for composite ways.

On Wed, Apr 11, 2018 at 12:08 PM André Pirard <A.Pirard.Papou at gmail.com>
wrote:

> On 2018-04-11 13:47, François Lacombe wrote:
>
> I would definetly map it with 2 distinct ways.
> They can both share the same nodes, or map the road as two "oneway"
> highways with the railway between both directions
>
> Good idea sharing nodes, that's doable but a bit tricky with JOSM. I
> wonder about other editors.
> I would however make a short test to see what Osmose say about it (rightly
> or not).
> There's a floating rule that ways cannot overlap unless making areas share
> the same limits (e.g. buildings).
> I would raise the layer=* of the railway. I seem to think overlapping is
> allowed then.
> I swear I don't map for the render but that doesn't stop me wondering what
> it will be.
>
> Cheers
>
> André.
>
> All the best
>
> François
>
> *François Lacombe*
>
> fl dot infosreseaux At gmail dot com
> www.infos-reseaux.com
> @InfosReseaux <http://www.twitter.com/InfosReseaux>
>
> 2018-04-11 0:48 GMT+02:00 Paul Johnson <baloo at ursamundi.org>:
>
>>
>>
>> On Tue, Apr 10, 2018, 17:30 Albert Pundt <roadsguy99 at gmail.com> wrote:
>>
>>> What's the best way to map a railway along a street, and how are the
>>> street intersections to be mapped? For example, this street
>>> <https://goo.gl/maps/XPCxsRkDZr22> in Lewistown, PA has a freight line
>>> running along the middle. Should it be mapped as two overlapping ways, as
>>> that example is currently, or should they be drawn as one way with all the
>>> highway and railway tags on it?
>>>
>>
>> The highway centerline at the mean location of the middle of the road,
>> per usual, and the tracks mapped between the rails per usual.
>>
>>>
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