[OSM-talk] Mapnik rendering issue with *_link roads

[Maarten Deen]

I finally found out what the issue is with this [1] situation. My issue 
with it is that IMHO it is not good to see the unclassified road 
rendered on top of the primary_link road. I made a test here [2] where 
the left primary is a primary_link and the right primary is a primary 
proper. Apparently mapnik's renderering rules state that primary_link 
roads should be rendered below unclassified roads. I haven't inspected 
the rendering rules in detail (I'm also not familiar with them) but I 
have seen that tertiary_link roads are also rendered below unclassified 
roads. I expect that any *_link road is rendered below any other (or at 
least motorway - unclassified) road.

Is this behaviour of mapnik wanted? As I said: IMHO it is not pleasing 
to the eye to see the unclassified road rendered on top of the 
primary_link road. In order of priority, a *_link road is just below its 
* counterpart but above the next lower road (so primary -> primary_link 
-> secondary).

[1] http://www.openstreetmap.org/?lat=51.352555&lon=6.014996&zoom=18
[2] http://www.openstreetmap.org/?lat=51.352419&lon=6.010627&zoom=18

Regards,
Maarten