[Tagging] Bridges and layers

[Nathan Edgars II]

On Mon, Jul 26, 2010 at 8:28 AM, Dave F. <davefox at madasafish.com> wrote:
> Layer is used purely as an aid to the renderer to distinguish where two or
> more ways *cross* each other:

Not quite purely - it gives nonredundant spatial information when a
bridge goes over another. Not that this has anything to do with the
layer_change proposal.

It seems to me that there are many actual bugs in the layer rendering
to fix first: http://trac.openstreetmap.org/ticket/2601