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

Steve Chilton S.L.Chilton at mdx.ac.uk
Sun Feb 10 19:41:32 GMT 2008

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

	-----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 
	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
	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?
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