[Tagging] Feature Proposal - RFC - value 'basic_network' for keys 'network:type', 'lcn' and 'lwn'

Peter Elderson pelderson at gmail.com
Wed Nov 17 13:41:56 UTC 2021


I am interested... can you tell me in laymen terms how the relations are
used in rendering and routing?

Fr Gr Peter Elderson


Op wo 17 nov. 2021 om 14:11 schreef Richard Fairhurst <richard at systemed.net
>:

> Peter Elderson wrote:
> > My understanding is that for rendering, a tag on the way is easier
> > and quicker than membership of a relation. Correct?
> > [...]
> > The purpose of routing then. [...] I know that it's a lot more
> > complicated, but the point is, it's way-based, and tags on the
> > ways are easier to process than membership of a relation.
> > Correct?
>
> Any cycling renderer or router needs to process relations as well as ways.
> I doubt there's a production-quality bike router that doesn't have relation
> support; certainly I've written hundreds of lines of Lua, C++ and Ruby code
> to support relations in cycle.travel.
>
> It isn't more difficult per se. The one difficulty I do encounter with
> relations is that nested routes, e.g. regional routes within NCN routes
> within EuroVelo routes, are used very inconsistently. But that's equally
> true of tags on ways - inconsistent tagging is a perpetual challenge with
> OSM data.
>
> Richard
> _______________________________________________
> Tagging mailing list
> Tagging at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/tagging
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20211117/9d7af91f/attachment.htm>


More information about the Tagging mailing list