[Tagging] tunnel=culvert

[Richard]

On Sun, Oct 25, 2015 at 02:39:47PM +0100, Florian Lohoff wrote:
> On Sun, Oct 25, 2015 at 10:20:10AM +0000, Gerd Petermann wrote:
> > I don't think that this is a strong point.
> > Thinking about my own edits I'd say that the
> > length could be +/- 4m because typically I just try to place
> > the nodes somewhere neer the road, if I find an existing
> > node that looks good enough I use that.
> >  On the other hand, I think we make 
> > assumptions about the width of the road based on its 
> > type (primary, secondary ,etc),
> > so this assumption would also apply on the culvert.
> 
> So we implicitly assume a width of a road now we propagate
> this fault to all attached objects? 
> 
> We should reduce errors by implicitly assuming something not
> increase them.

agreed. But this is open-STREET-map so perhaps the streets should 
be fixed first. Does not make much sense to map culverts with 
sub-meter precission while freeways are still linear ways.

Richard