Hi. (Why in english, btw?)

On Thu, Aug 27, 2009 at 04:08:49PM +0200, Konrad Skeri wrote:
> What is the correct key to add to make a historical border?
> 
> Using boundary=historical doesn't say anything of the type of border, so I'm 
> thinking of just adding historical=yes on a border (and corresponding 
> relation). I noticed the historic=* key, but that seemed mainly aimed for 
> historic sites and ruins, so I don't know if historic=yes is better since 
> historic=* is already in use, or if the purpose is too different,
> 
> Just giving it a quick thought historical=yes feels best. Opinions?

This is NOT a good idea, because it requires every existing application
using borders to be changed to take account for the historic=yes tag.
Tagging schemes should as far as possible not contain negating
statements like this.

Normal recommendations from the #osm irc channel for these cases is
boundary=historical;historical=1

That is, you reserve one otherwise unused value for the "main" tag, and
create a new tag with this name. The new tag is then given the value
usually found in the main tag.

In addition to historic tags, this also goes for things like proposed or
under construction roads etc.

> Also, are there any appropriate keys for showing when the border was valid/in 
> use?

There is someone working on historic railways, you could try checking
out that.

Regards,

-- 
Einar Ryeng


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