[OSM-talk] Tagging hierarchies

[Robin Paulson]

On 14/01/2008, Jon Burgess <jburgess777 at googlemail.com> wrote:
> > areas must form complete loops, otherwise they are treated as ways by
> > the renderer
> >
>
> The problem is the opposite: You've got a way forming a circular shape,
> how do you know it is circular loop (e.g. like a moat circling a castle)
> and not an area?

by drawing it as an area: given that the moat has a width, it can be
drawn as an area, forming a loop. imagine it as a rectangle, where one
end of the rectangle is extruded in a curve, to butt up to the other
end