[OSM-talk] administrative boundaries that run along roads - in the Mapnik layer

[Adrian Frith]

On Sun, 2008-02-10 at 19:41 +0000, Steve Chilton wrote:
> Where I have been mapping admin boundaries I put them all in as layer=1 - this brings them above most things in the mapnik rendering.
> See: http://www.openstreetmap.org/?lat=51.60655&lon=-0.05558&zoom=15&layers=B0FT
>  
> Cheers
> STEVE

Why did I not think of that? (slaps head). In fact, I could put them in
as layer=5 which will put them on top of virtually any other conceivable
feature (like, a river underneath a three-layer highway intersection...)
In fact, I have a strange idea that osmarender may in fact put them on a
virtual layer 5, though I could be *completely* hallucinating that...

Cheers,
Adrian

> 
> 	-----Original Message----- 
> 	From: talk-bounces at openstreetmap.org on behalf of Adrian Frith 
> 	Sent: Sun 2/10/2008 7:06 PM 
> 	To: talk at lists.openstreetmap.org 
> 	Cc: 
> 	Subject: [OSM-talk] administrative boundaries that run along roads - in the Mapnik layer
> 	
> 	
> 
> 	Hi All,
> 	
> 	In Cape Town we've been mapping the suburb boundaries (which are
> 	official) as boundary=administrative admin_level=10. These boundaries
> 	run often down the middle of roads, railways or rivers. They show up
> 	very nicely on the Osmarender/T at H layer as dashed red lines - see for
> 	example
> 	http://www.openstreetmap.org/?lat=-33.95&lon=18.45&zoom=12&layers=0BFT
> 	
> 	On the Mapnik layer, however, they show up only where they do *not* run
> 	along roads or railways - it seems that the other features are rendered
> 	on top of the boundaries. Should we not be rendering administrative
> 	boundaries above real features?
> 	
> 	My understanding is that this would require a change to the z_order code
> 	in osm2pgsql. Is that correct?
> 	
> 	Regards,
> 	Adrian
> 	
> 	
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