[OSM-talk] [Talk-GB] England Cycling Data project: DfT cycling data now available for merging

[rob.j.nickerson at gmail.com]

On , Ed Loach <ed at loach.me.uk> wrote:

> Thanks Rob, but in this case the lanes are on both sides of the road
> in the relevant places. And, as you note, left and right are
> relative to the direction of the OSM way, so the direction each
> country drives on isn't relevant.

So are you saying that lanes tagged as either cycleway:left=lane or  
cycleway:right=lane are both to be rode in the direction of the way? If not  
then the side each country drives on must be relevant. (note that a  
cycle "lane" is different from a cycle "path" - a "lane" lies within the  
main road carriageway).

> I guess I was really asking is
> whether I should tag both :left and :right or whether there was a
> :both equivalent.

> In the case of cycle lanes you need to use left and right precisely
> because it eliminates the need to know which side people drive on,
> which using forward and backward would require.

I don't see this. Right and Left tell you where the lane is, but it does  
not tell a user (or routing software) which direction you can ride in. This  
requires knowledge of which side of the road each country drives on (or  
forward/backward tags).


> - snip -

Rob
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk/attachments/20120618/9405e69e/attachment.html>