"Edward Green" <spamspamspam3@netzero.com> wrote in message 
news:1155946281.584689.216870@m79g2000cwm.googlegroups.com...
| What does a metric encode?
|
| Forget spacetime for a second, and consider the simpler example of a
| three dimensional block with an embedded cartesian coordinate system.
| In this coordinate system, let the metric be:
|
| ds^2 = dx^2 + dy^2 + dz^2

The Manhattan metric is d = x+y+z. Use that if you want to argue metrics.
It is simple enough, the distance you travel is up, sideways and forward.