I have imported all the addresses for Faroe Islands
and updating them from time to time when there is new data available
see http://wiki.openstreetmap.org/wiki/Import/Catalogue/usfo
i keep an Id tag (us.fo:Adressutal) so i can Create/Update or Delete address
nodes
-----Original Message-----
From: Jochen Topf
Sent: Thursday, October 04, 2012 7:39 AM
To: Svavar Kjarrval
Cc: talk@openstreetmap.org
Subject: Re: [OSM-talk] Semi-automated edits - postal code database
Hi!
On Wed, Oct 03, 2012 at 11:10:05AM +0000, Svavar Kjarrval wrote:
I'm trying to find a good method to maintain data from outside sources.
The data in question is the Icelandic postal code database (which they
say we may use freely). My searches on the OSM wiki have been fruitless
so far.
The idea is to maintain the data in associatedStreet relations. Each
relation has a tag called 'götuskrá:id' which value is a direct
reference to the row ID in the files we retrieve from the postal
company's website. The file formats available are CVS and XML 1.0. The
script would presumably go ever each associatedStreet relation and make
any changes (if appropriate) when a götuskrá:id tag is found. The output
could be an OSM change file loaded into an editor like JOSM to be
uploaded manually. Maybe an automated process later when we're confident
that everything is done correctly, and of course after submitting the
script(s) for review by the local community.
It is not a good idea to add some random ID of your favourite database to
OSM, because nobody except you can understand this ID and do useful things
with it. It just confuses mappers and make it more difficult to edit the
data. For every change somebody does to the data they have to know what this
tag means so that they can properly do their edit. And if they don't, people
will just mess up your data and you will not be able to use this ID for
syncing the data anyways.
And in this case I don't even see why you need it. You have street names and
postal codes in both OSM and the Icelandic postal code database. If
something
changes you can find out which combinations changed and apply those changes
to OSM easily just based on the postal code and street name. There is no
need for those IDs.
And, btw, you should not use the associatedStreet relation. It solves the
same
problem as the addr:street tags on nodes and buildings but in a much more
complicated way. The overwhelming majority of all addresses are tagged with
addr:street (there are nearly 15 million addr:street tags vs. only 18.000
associatedStreet relations).
Jochen
--
Jochen Topf joc...@remote.org http://www.remote.org/jochen/
+49-721-388298
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