[Tagging] RFC - Discourage railway=preserved

Kai Michael Poppe - OSM osm at poppe.dev
Wed Apr 7 15:25:22 UTC 2021

Hey all,

In case you didn't see, I created a first experiment to fix that with just trying to create parity between both renderings - and I my test with the latest Geofabrik-PBF from DE-NDS (using hstore, no problems on that end), it worked ok (apart from the name not showing correctly): https://github.com/gravitystorm/openstreetmap-carto/pull/4361 - An example with old and new is shown.


On 07.04.2021 13:48, Jeroen Hoek wrote:
> On 07-04-2021 12:14, Mateusz Konieczny via Tagging wrote:
>> Note "Database layout change" part - right now this tag is not in a database
>> used for rendering :(
>> So it may require changing in database import definition and deployment will
>> be definitely delayed and/or more complicated.
>> Though it is also possible that OSM Carto has no need for yet another barely
>> distinguishable and unclear rendering difference, maybe railway=preserved
>> special rendering should be dropped?
> As Marc_marc also noted, I think you can just use the hstore tags column
> to filter on those (I know this works in my airfield rendering
> experiment), unless that is not an option because of performance. Do you
> know who we could ping in that Carto issue to answer that question?
> Dropping rendering is a choice that the Carto maintainers can make of
> course. I personally don't have a strong opinion either way (slightly
> preferring some form of differing rendering), just that rendering the
> old method but not the new method is undesirable at this point where the
> new method has superseded the old one.
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