[OSM-dev] Layered Tiling (Mapnik)

[marqqs at gmx.eu]

> It would break some layering - if you paint 
> roads and railways on different tiles then you can *either* display 
> roads over railways or railways over roads but not - but on the whole it 
> should not be too bad.
> Has anyone done some experimentation in that direction?

Yes, I did exactly this railway thing you're talking about. Look here:
http://openptmap.org/?zoom=13&lat=52.51787&lon=13.39638&layers=0B000T

But there is one problem you would have to deal with: there is no collision avoidance between the texts of different tile layers.

Markus