Hi Lars
Sweden's administrative divisions, both current and historic.
This could be used as a skeleton for adding more information, such
as population statistics and georeferencing. As far as I know,
this is not currently provided from any single and open source.
Have a look at the geonames.org project : http://www.geonames.org
It tries to cover most of this.
How can temporal changes, such as the merger of adm3 011401 with
adm3 011402 at some point in time, be represented in XML? Or is
that only too advanced?
Besides this administrative division, Sweden also has an
ecclesiastical division (episcopal sees, contract districts,
pastoral districts, parishes) and a judicial division (court
districts). These are partly overlapping, for example the adm3 is
mostly the same as the fourth level of the ecclesiastical division
(parishes).
I fear it will get really complex if you want to do all of this
internationally. The challenge in this, is not to design an xml format,
the real challenge is to find and maintain the data worldwide.
So my question is first: Is anybody doing this already? Is there
a standard format that I should use?
There are a lot of standards. Over in the GeoRSS mailing list we are
discussing right now, how to add administrative divisions and other geo
information to RSS :
http://georss.geonames.org/georss-draft.html
In the discussion, these encodings have come up so far :
IETF :
http://www.ietf.org/internet-drafts/draft-ietf-geopriv-dhcp-civil-09.txt
opengeospatial :
http://schemas.opengeospatial.net/ows/1.0.0/ows19115subset.xsd
oasis-open : http://www.oasis-open.org/committees/ciq/download.html
Marc
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