[OSM-talk] buildings and roads

Peter Miller peter.miller at itoworld.com
Thu Dec 18 11:01:30 GMT 2008

On 18 Dec 2008, at 10:52, Steve Chilton wrote:

> Equally roads don’t usually run over buildings – which could be case  
> if reversed. Basically auto-rendering of these two can not be  
> correct for all cases/zooms.
> Needs intelligence to say “nudge that building away from the road in  
> this instance” – later?

Surely this is just a great example demonstrating that catography is  
harder than it seems at first sight. The problem is that the roads are  
not draw to their real width and therefore the building must be nudged  
or shrunk so as not to collide with the super-wide roads as rendered.

What we should not do is move the building outlines on the ground to  
make the rendering work, as far as I am concerned it is a rendering  
problem even if it is  a hard one.


> Cheers
> Steve Chilton, Learning Support Fellow
> Manager of e-Learning Academic Development
> Centre for Educational Technology
> Middlesex University
> phone/fax: 020 8411 5355
> email: steve8 at mdx.ac.uk
> http://www.mdx.ac.uk/schools/hssc/staff/profiles/technical/ 
> chiltons.asp
> Chair of the Society of Cartographers: http://www.soc.org.uk/
> SoC conference 2008:
> http://www.abdn.ac.uk/cartographers08/
> From: talk-bounces at openstreetmap.org [mailto:talk-bounces at openstreetmap.org 
> ] On Behalf Of Nathan Mixter
> Sent: 17 December 2008 05:50
> To: openstreetmap
> Subject: [OSM-talk] buildings and roads
> Just wondering. Shouldn't buildings be rendered behind roads.  
> Currently buildings are drawn above a road when the road is wide  
> like a highway or major road. Obviously buildings don't cut into  
> roads. If the road layer is on top this won't happen.
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