On 15/06/2023 16:59, Cornelia Scholz via Tagging wrote:
Dear all,
I would like to propose to add*'flood'* as value to the *key 'hazard'*
(to be used in combination with the tag*boundary=hazard*).
...
What already exists is the key flood_prone
<https://wiki.openstreetmap.org/wiki/Key:flood_prone>=*which is mainly
for roads that are known to be flooded frequently. The mapping
descriptions include instructions for mapping flood prone waterway
crossings, bridges, and highways. However, it is not intended to tag
areas, which would be covered by the proposed new tag of hazard=flood
for areas tagged as boundary=hazard.
Hello,
flood_prone=yes on areas does actually get a reasonable amount of use:
https://overpass-turbo.eu/s/1w7k
(about 3000 worldwide)
https://wiki.openstreetmap.org/wiki/Tag:boundary%3Dhazard has much less use
https://overpass-turbo.eu/s/1w7l
and seems so far been restricted to "fixed" areas such as (clicking at
random)
* A shooting range: https://www.openstreetmap.org/way/1149857565
* An explosives depot: https://www.openstreetmap.org/way/1166217800
hazard=flooding is used, but mostly on hghways:
https://overpass-turbo.eu/s/1w7m
I'd suggest exploring taginfo (and the overpass links from it) to see
what keys and values are in use already. There may well be a use case
for some new key/value, but I'm not convinced yet. See e.g.
https://taginfo.openstreetmap.org/keys/hazard#values and filter the
various values.
Is "OpenHazardMap" an actual map or just a wiki page? I ask because I
live somewhere where river flooding is a thing (although usually of very
low impact in terms of people or property) and I have created maps of
"what is currently flooded" based on current measured level and previous
observations. See
https://www.openstreetmap.org/user/SomeoneElse/diary/398374 .
Best Regards,
Andy
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