[OSM-dev] Programatic reconstruction of postal code areas

[Simon Poole]

Speaking on the Swiss situation, there is an open access postal area
dataset available on a wonky licence, depending on what you want to use
it form it may be OK. See
https://opendata.swiss/en/dataset/amtliches-ortschaftenverzeichnis-mit-postleitzahl-und-perimeter1

Originally at least it was generated by examining the postal delivery
routes, now days it lives a senseless and expensive life of its own.
Note that it is updated on a monthly base and tends to have a large
number of changes every time.

As to address data in OSM: there is no real agreement if we are tagging
real postal addresses including postal cities or not, postal cities tend
to be difficult to survey and not really accessible for non-locals, so
tend to end with a mix of admin entities and postal whatevers in addr:city.

Simon