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

John Smith deltafoxtrot256 at gmail.com
Sun Oct 11 09:50:26 BST 2009

2009/10/11 SLXViper <SLXViper at gmx.net>:
> John Smith wrote:
>> I can't think of a good solution for this, a few years ago they
>> renumbered all properties along roads outside of residential areas to
>> be the distance in decametres (10s of metres, 100m would be #10 etc)
>> from the start of the road, they also have even on the right, odd on
>> the left, this makes it easier for emergency services to find places
>> because its based on distance.
>> I doubt there would be an easy was to interpolate this information for
>> display, but it could be used to work out end points for routing, and
>> all we need to know is which end of a way is the start, the rest can
>> be worked out.
> The universal solution for such special cases would be tagging single
> addresses without interpolation. This would provide information
> - what house numbers do actually exist? In this special case nearly
> every value could be possible.
> - where exactly is this house number? Since numbers are based on
> distance this could also be calculated from the given number - but what
> if want to know the house number of a given position?
> The only disadvantage of this method would be a little bit more work "on
> the ground" - but nothing photo mapping couldn't solve ;)

As I stated, this sort of tagging wouldn't be that useful for
displaying/rendering, but could be used for routing.

If the routing engine is coded in a smart way, it could be used to
collect the house numbers asked for and use that information to add
street addressing.

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