[OSM-talk] Underground / hovering buildings

[Elizabeth Dodd]

On Tue, 15 Feb 2011 20:56:54 -0500
Nathan Edgars II <neroute2 at gmail.com> wrote:

> Since giving long ground-level ways nonzero layers screws up every
> place they cross another way, it seems clear what should be done.

-1 is used for rivers commonly over long distances where traced and no
idea where the bridges actually are.

whether the river is at or below ground level is another opinion which
varies in different environments