[Tilesathome] Take heed of access restrictions

[Knut Arne Bjørndal]

Oops, seems I sent this only to Marc, it was meant for the list:

On Sat, May 17, 2008 at 11:30:58AM +0200, Marc Schütz wrote:
> Am Freitag, 16. Mai 2008 20:21 schrieben Sie:
> > On Fri, May 16, 2008 at 07:12:05PM +0200, Marc Schütz wrote:
> > > Some months ago I wrote a patch to render access=* (see this trac ticket:
> > > http://trac.openstreetmap.org/ticket/364). Unfortunately there wasn't a
> > > lot of feedback, so I'm writing this notice to encourage some discussion.
> >
> > Could have been that it doesn't look good for ways that go diagonal
> > like the lines you are drawing. Perhaps doing diagonals both ways
> > (making a lot of tilted squares) would look better?
> >
> 
> I was already using red criss-cross for access=no, but probably it isn't very 
> important to distinguish this from access=private. I changed the files to 
> always render as criss-cross pattern.

That's looking good. I don't think it's a big deal that access=no and
access=private looks the same.

Oh, and before anybody starts screaming: If anybody disagrees with it
they are welcome to come up with another good style for it and write a
patch :P

> In addition, I also rearranged the rendering order so that the access pattern 
> for amenity=parking is now drawn immediately after the parking areas (below 
> other features like roads etc.).
> 
> > Also, now I found an old test output here that indicates it might in
> > some cases have the same kind of problem with bezier curves that
> > cycleways used to have. Try making a local test file with loads of
> > squiggly roads and see if the access markings follow the roads
> > properly. If it doesn't smart-linecap's is probably the problem.
> 
> I don't see this problem here.
> 
> I'm currently rerendering the Bamberg tiles with the new stylesheets. Attached 
> are some SVGs for the relevant zoom levels and the new patch.

It can take some wiggling to provoke that bug, take a look at
http://bob.cakebox.net/tmp/osmarender-access-curvebug.png

-- 
Knut Arne Bjørndal
aka Bob Kåre
bob at cakebox.net
http://bob.cakebox.net/
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