[Talk-us] User going around adding '-' to ref tags in Michigan

Paul Norman penorman at mac.com
Fri Sep 26 18:32:12 UTC 2014

On 9/26/2014 9:57 AM, Martijn van Exel wrote:
> This is not really appropriate since the main map rendering stylesheet
> still takes ref tags from ways to paint the route number shields.
> There is work underway to take that information from route relations
> though:https://github.com/gravitystorm/openstreetmap-carto/issues/596
> - perhaps Paul can comment on how close that is to being complete.
Yes - it's not a trivial problem, because a lot (maybe most) of the 
world uses ref tags on ways, often exclusively. This combined with 
differentiating shields based on road classification means that the 
shields need to be rendered on the ways, not the relations, even if the 
data in the shield comes from the relations. What does that mean? Giant SQL.

I have a demo layer, but I'm not making it public since there's some 
significant performance problems and it'd stop my server from being used 
for any other demos, including the landcover label change, which is much 
closer to being ready.

I did do a screenshot, showing rendering in the Seattle area based on 
route relations: 

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