On 27/11/20 11:15 am, Andrew Hughes wrote:
Hi All,
Apologies for the boring subject, but I'd like to talk about mapping
out Culverts on (way/highway) roads.
https://en.wikipedia.org/wiki/Culvert
The reason we would like to map these is that they influence road
usage and in particular usage for heavy vehicles. They are very much
like a bridge in that they have weight & width limits and often have
conditions of use (such as maximum speed) or considerations during
natural disaster scenarios (i.e. flooding). /Note - tagging should be
on the way, not on a node./
Yet to see any signs on any culvert in Australia with weight & width
limits.
May culverts are simple pipes under the road, just a little wider than
the road. It would be difficult to map these with any accuracy for the
length of the pipe.
This subject has a long-running chequered past that hasn't reached a
conclusion
https://wiki.openstreetmap.org/wiki/Talk:Tag:tunnel%3Dculvert#.22Tagging_controversy.22_section
From my understanding, the convention is to tag the water course (i.e.
river/stream/creek) as tunnel=culvert. It's great as it models where
water traverses man made structures and I can see it helping many
scenarios. However, it doesn't help with road usage.
We need to model/tag the culvert as part of the road infrastructure.
Would a node that connects both road and water way be sufficient?
We plan to be tagging a lot of culverts in the future, so it's
important for use to get some clarity around this for obvious reasons.
If imagery is used, how do you distinguish between a small bridge and a
large culvert?
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