[talk-au] Small culverts/bridges in bushland

Ian Steer iansteer at iinet.net.au
Wed May 23 22:32:49 UTC 2018



> 
> Hi,
> 
> Lately a mapper has been adding heaps of fords in SE QLD bushland along
> with more creeks/streams, however I've noticed quite a lot of the fords
> aren't actually fords based on my local knowledge of the area. I tried
> commenting on a changeset (https://www.openstreetmap.org/changeset/58540304)
> 2 weeks ago and again a week ago without a response, they have been active
> in that time and appear to be a long time contributor, but I'm now at a
> loss on how to contact them.
> 
> My question isn't about what they've been doing, but about the fact I've
> not wanted to split ways and try to line up a tiny culvert or bridge when
> they are physically so small, however because they haven't been mapped
> someone is now incorrectly added fords. Many of the culverts are just a
> small pipe (sometimes as small as 20mm diameter and 0.5m long) with dirt
> over it to keep the trail dry (the trail is usually built up a little in
> the low lying area), and many of the bridges are only a metre long timber
> bridge especially those added for MTB.
> 
> The wiki states that bridge=* and tunnel=* should not be used on nodes, so
> I've not used them and in the past only mapped fords (many which have big
> sized gravel or stepping stones) and obviously use a shared node.
> 
> I've read a bunch of discussion on this topic and agree that splitting ways
> to model these is overkill as the tags on each way can get out of sync and
> get in the way, but removing the incorrect fords and not putting something
> in their place irks me. The wiki's comment about a ford: "You are both on
> the highway and in the waterway, and not separated logically as a stream
> under a bridge would be" makes complete sense, and I don't want shared
> nodes for these cases even though many streams are intermittent.
> 
> Finally my question, why couldn't we map a culvert as a node of a waterway,
> or a bridge as a node of a highway? The only other option I can think of is
> to add a note to a node of highway/waterway describing what is there so
> someone doesn't add a ford.
> 
> Thanks, Jono
> 
I have been “guilty” of adding small fords and culverts on bush tracks because JOSM gives me an error message if you have a waterway crossing a way without some sort of bridge, Ford, etc - and I try to avoid doing edits and leaving errors/warnings. 

Ian



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