[OSM-talk] New Mapnik Style

[Lauri Kytömaa]

> http://www.openstreetmap.org/?lat=51.98473&lon=4.37146&zoom=17
> where cycle ways aside the Schieweg road are invisible due to the width
> of the road..

I didn't know anything about the streets in question, so I downloaded that 
region into JOSM and then I looked at some better-than-yahoo aerial photos 
to do some distance measurements (lots of parked cars, of length 4,5 to 5 
meters, visible for comparison). As it now stands in OSM, the distance 
from the Schieweg centerline to the cycleway centerline is under 5 meters. 
A truck is generally 2,55 meters wide (without the side mirrors) and a 
minimum width for lanes, where heavy traffic common, is typically 2,8 to 
3,5 meters, everywhere around Europe atleast. That section of the road 
seems to have three lanes in total and quite a wide cycleway, so a minimum 
distance of 7 to 8 meters between the centerlines is more than likely. 
Some distance north of the location you linked to, the separation distance 
is drawn more reasonable (and the cycleways do show nicely beside the 
Schieweg). Distance measurements are easy to do while editing, at least in 
JOSM.

In general, at z17, almost all features do seem to appear in correct 
width. This might not be the case for very 
narrow or wide streets, though.

-- 
Lauri Kytömaa ----------- Leppäsuonkatu 7 A 32
lkytomaa at cc.hut.fi  ----------- 00100 Helsinki
http://www.iki.fi/lkmaa/ --------- 040-7580434