[Tagging] Different approaches by other projects

[Mateusz Konieczny]

Nov 17, 2021, 22:08 by tomasstraupis at gmail.com:

>  * absolutely no control on quality (of anything: tagging schema,
> data itself, even general direction)
>
That is not true at all.
See https://wiki.openstreetmap.org/wiki/Quality_assurance
for example https://wiki.openstreetmap.org/wiki/JOSM/Validator

>
>  And at the same time we have:
>  * governments opening their data at a very fast pace, and their data
> is homogenous - stable and very usable (curated by professionals with
> a clear knowledge on how and where the data is used)
>

Maybe it is true for some specific datasets or specific countries.

If you work with government data and ended with this impression
you either are lucky or have unusually competent government
in this area.

But not true in general. Just few recent examples that I encountered:

London published some datasets about planning permissions.
With empty polygon field, because something broke down 
(at least centroid is still included).
Address data is in free form format, UPRN codes often missing etc etc.
https://www.london.gov.uk/what-we-do/planning/digital-planning/planning-london-datahub

Poland published government data about buildings, with some
garages marked as churches, swimming pools marked as garages.

Illegal buildings are missing as it was based on construction permits.

Poland government address data in some places have the same 
address multiple times (record was 11 repetitions I think)?

Australia government data has dried-out rivers present as still
flowing in official datasets.

Just see at documented imports in OSM to discover many more cases of
broken data and how the handled it.

> other global datasets are emerging. look at natural earth dataset
> (yes, it is for the time being for small scale maps only), but they've
> learned OSM mistakes very well: they DO accept anybody to map, but
> results are curated by professionals and new mappers are prepared
> before doing anything.
>
It is not coincidence that "all changes are reviewed" is done for a 
"small scale maps only".

Their workflow would not work at all at OSM scale.

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