[OSM-talk] layer tag issue in mapnik settings?

[Steve Bennett]

On Mon, Mar 14, 2011 at 11:06 AM,  <john at jfeldredge.com> wrote:
> If the hospital corridor is at grade level (i.e., it is on the ground floor), and the service road dips below grade level in order to go below the corridor, then a layer of -1 is correct for that portion of the service road, and MapNik is incorrect if it won't handle it.  Does MapNik have trouble rendering tunnels?

The two scenarios (service road layer 0, corridor layer 1 and service
road layer -1, corridor layer 0) are equally correct. There's no such
thing as "grade level" when it comes to the layer tag.

But...yes: renderers should respect the layer tag, on all objects. It
sounds like Mapnik only respects it in combination with certain other
tags, such as bridge=yes and tunnel=yes.

Steve