[OSM-talk] is_in, isin: namespaces
Tom Higgy
higgy at bandnet.org
Fri Nov 9 23:51:33 GMT 2007
Hi folks.
I added a comment to the wiki [[Talk:Placename_hierachies]] about using
namespaces for identifying what each part of is_in actually means.
It's something that's been brought up before and I think makes it much
easier to derive some useful place data from OSM.
Currently is_in is basically a list of tags, although in most cases in a
particular order. Different people put in different levels of details
(some just county, some include country, some continent). Using
namespaces allows one to know Shropshire is the county, for example,
without having to guess it.
I've been using isin:country, isin:county, etc, for a while as well as
is_in and I know some others have been too. It'd be nice to have it
standardised.
Of course, conversion would need some sort of 'intelligent' script to
work all these out. My import script found >100,000 nodes tagged with
place=, those with isin:county tags give about 23 unique counties.
Anyway, I'll leave it for discussion.
Cheers,
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