[Talk-GB] Rendering national/regional walking trails

[Andy Townsend]

On 22/04/2017 20:43, Elizabeth Oldham wrote:
>
> Anyway. I noticed on your maps you have multiple ldpnwn labels along 
> the routes, like the Cumbria Way, and Coast to Coast. I've been unable 
> to get more than one or two labels. I've been searching but it's 
> usually the other way around - you have too many labels and need to 
> space them out. Is there a trick I'm missing? 

I may have got hold of completely the wrong end of the stick here, but 
assuming I understand the question properly, I think you're asking how 
two names appear for trails at e.g. 
https://map.atownsend.org.uk/maps/map/map.html#zoom=14&lat=53.14563&lon=-1.75507 
?

What's happening is that at 
https://github.com/SomeoneElseOSM/SomeoneElse-style/blob/master/style.lua#L2320 
a "highway=ldpnwn" tag is being added for each relation, and then at 
https://github.com/SomeoneElseOSM/openstreetmap-carto-AJT/blob/master/roads.mss#L1705 
the purple dots are added, and at 
https://github.com/SomeoneElseOSM/openstreetmap-carto-AJT/blob/master/roads.mss#L3088 
the text-spacing defines how far apart the labels go.

Because they are "just highways that happen to overlap each other" as 
far as Mapnik is concerned, it makes sure that the names don't overlap 
on the map.   I wrote a diary entry at 
http://www.openstreetmap.org/user/SomeoneElse/diary/38988 about it.

Best Regards,

Andy


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