On Sat, Jan 10, 2015 at 1:38 PM, Wiktor Niesiobedzki <o...@vink.pl> wrote:

> 3. Addresses change. Currently there is no way to isolate the
> situation, that a point in OSM needs a change of street name, city
> name or housenumber, because this name changed has changed in the
> source. I can't mark all the points with different names, because 80%
> of time, in OSM is proper name, but I don't want to loose that 20%
>

That's why it is better not to repeat city and postal code on each address
node, but use boundaries. Of course this works only when the postal codes
are areas, but I believe this is the case in Poland.

I do not believe that city or postal code changes are only for 1 node, it's
for a lot of nodes. By using boundaries, you only have to update the
boundary and not each individual node.

On the other hand, the algorithm used for the Flemish import detects that
the address node in OSM that is closest to the node for the external DB has
the same addr:street. If not, this mismatch is reported on the webpage.
It's probably easy to add city as well.

regards

m
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