On Tue, 14 Sep 2010 09:49:54 +0200
M∡rtin Koppenhoefer <dieterdre...@gmail.com> wrote:

> > No, that's exactly the same as 'oneway=no' on two-ways roads. When
> > the tag is not present, we assume that the road is two ways. That's
> > it. If it's wrong, then fix it by adding the oneway tag.
> > It is the same for waterways and the direction of the way. If it's
> > wrong, then reverse the direction of the way with your prefered
> > editor. We have similar conventions for the coastline, we don't
> > have/need a tag saying which side is the land and which side is the
> > water and nobody complains.  
> 
> 
> +1, there is also other similar conventions like
> barrier=retaining_wall.


This is detailing tags which have two parts to their meanings. Really
this is a form of shorthand which is convenient for those who know the
code, and not to those who don't comprehend the 'code'. What sort of a
difference does this make to the computed use of the data? We can only
make a decision on whether these conventions continue when we
understand how it affects the data use.
There are good arguments each way for the input of the data.

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