[OHM] Advice on modelling historical boundaries & where to keep them?
Jo Walsh
metazool at fastmail.net
Thu Feb 19 06:30:04 UTC 2015
Thank you all for the helpful responses on the thread,
> The intend of this contributor was clearly to find an existing town
> into its older region using the default OSM name finder (he was
> involved in a forum discussion) where nominatim could, for instance,
> sort the results by dates. Of course, tags like
> "type=boundary:1790-1972" or "admin_level:1790-1972=2" are not
> recognized by nominatim.
This is a similar though much more clear-cut version of the recent case
that came up for the DWG. A mapper is adding historical townland
boundaries which still have contemporary addressing uses; a business
user of the data was deleting the boundaries in their local area on the
ground that the administrative names coming back from Nominatim now
don't match up to local, contemporary common knowledge.
There's a tremendous wealth of work going on mapping the Irish Townlands
into the main OSM, of which this is a part:
http://wiki.openstreetmap.org/wiki/Ireland/Mapping_Townlands
And I'm somewhat at a loss as to what to suggest as an even handed
solution :/. The core of the problem seems to be the shared use of
boundary=administrative and admin_level=[1-10] tags to mark up historic
boundaries which still have *some*, but not all, contemporary relevance.
I would not like to see "tagging for the geocoder" pushed too far.
- Jo
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