[OSM-talk] Cambridge City Centre Cycling Map

[Andy Allan]

On Dec 6, 2007 1:02 PM, David Earl <david at frankieandshadow.com> wrote:
> On 06/12/2007 12:30, Andy Allan wrote:
> > That's really cool. Can I ask how you did the symbol placement - I'm
> > guessing by hand?
>
> Yes. The base map was assembled from Mapnik tiles, and then
> substantially simplified in Photoshop and some of the horizontal
> captions replaced because they weren't clear enough. The symbols were
> also added in Photoshop layers.
>
> (If we had had the time, we'd have done a new style sheet for Mapnik or
> Osmarender to do thicker streets and possibly larger captions, and
> dropped all the extraneous detail like churches etc at that time rather
> than by image editing. Incidentally, the college buildings you can now
> see on OSM were added after we started the project).
>
> > Also, I'm intrigued by the cycling-both-ways thing. I've checked a few
> > of the roads in the db, and they are mostly just marked as oneway=true
> > - are these roads where the no entry sign says "except for cycles" or
> > are do they have separate contraflow cycle lanes? I don't know
> > Cambridge that well so I'm interested in the real world more than the
> > tagging.
>
> If you scroll down the page I sent the link to above, you'll see some
> photographs of some of the locations and how they are signed.

I'll give myself 0 out of 10 for observation skills :-)

> The streets where cycles can go both ways are mostly "false" one way
> streets - that is no entry signs at the end, with a cycle bypass - a
> very common arrangement in Cambridge. Some are done by "no motor
> vehicles" signs (including the newly lifted restriction in Corn Exchange
> street which looks like a contraflow lane but formally actually isn't),
> and there is one formal contraflow cycle lane (in Downing Street /
> Pembroke Street).

Yeah, the false one-ways are fairly common round my way (sw london),
occasionally with bike sneak-throughs. Although tagging (and thus
routing) these things are fairly straightforward (very short one-way
road with adjacent cycleway), my concern is rendering them usefully.
Fiddly little false-oneways really don't show up on many zoom levels,
and I'd prefer to render them as oneways throughout their full length
(i.e. ignore the potential turning-round issue) as has been done with
this map.

Tricky. Not sure how to automate the rendering. But I like the map,
it's given me some ideas!


Cheers,
Andy