[Tagging] importance=* tag (for transportation etc)

Martin Koppenhoefer dieterdreist at gmail.com
Wed Mar 23 10:20:24 UTC 2016

2016-03-22 17:29 GMT+01:00 Janko Mihelić <janjko at gmail.com>:

> For example, Bethlehem, the birth place of Jesus, has a population of 25
> 000 and 110 articles. A nearby city, Beit Shemesh, has a population of 100
> 000 and 32 articles. I think that's a great way to decide which city to
> display on lower zooms. Even better, you could add the length of text in
> all articles. An important city will almost always have more text than a
> less important one. And in the end, add population into the mix for good
> measure.

What about Frankfurt (am Main) and Wiesbaden?
Frankfurt has a population of 700.000 and a wikipedia page in 156
languages, the German article lists 107 sources, it has no important
political-administrative function
Wiesbaden has a population of 280.000 and a wp page in 121 languages, the
German article lists 122 sources, it is the capital of a German land
both articles are very long (without counting they look similarily long)
and have an excellence predicate.

On a personal judgement I'd definitely give Frankfurt much more importance
(important financial place, important airport, historically important,
culturally important)
Frankfurt is also the main city of a metropolitan region with 5.8 M
population: https://en.wikipedia.org/wiki/Frankfurt_Rhine-Main (but you
can't find this information in OSM)

Looking at the wikidata classes the importance is not completely clear:

big city
location with spa
state capital in Germany
urban district of Germany
major regional center within the scope of Hesse

big city
Free imperial city (until 19th century)
college town
financial centre
urban district of Germany

Interestingly, if you look at the sister cities, it becomes very clear that
both play in completely different leagues (but you have to have an idea
about these sister cities to make this judgement).

In this case, which is likely easy for humans to decide, it looks quite
difficult for a computer to see the bigger importance of Frankfurt (yes,
the population is an indication, but political administrative importance
plays in favor of Wiesbaden).

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