[Tagging] How to tag house numbers based on decametres?

[Liz]

On Tue, 13 Oct 2009, Peter Childs wrote:
>  100km is the distance from hmm Washington
> to Baltimore or London to Oxford (give or take) if your going to only
> survey a few points in that distance,
Each main road in my area will be easily 70 to 140km in length
eg Hay to Balranald is 129km.
The population density is certainly not requiring a point every 100m to 
determine the rural road number, but as it is a mathematical function, it can 
be defined and used for a routing engine.