It appears that most features with the tag "flood_prove=yes" are covered by water on a somewhat frequent basis, perhaps once every year or two, to once a month, or even more often during a rainy season.
However, I believe most of these features are prone to "flash flooding", since they are often mapped in dry areas like Australia, and the description says: "Whether or not the feature is likely to flood after very heavy rain." So this tag might be appropriate if the features that you want to tag are somewhat frequently flooded, like at least once every year or two, or more often. If your survey data was more on the basis of "this feature has a 1% to 10% chance of flooding on an annual basis", that is, 10 year or 100 year flood risks, then I would use a different tag, not "flood_prone=yes/no". But it's also questionable if entering 10 year or 100 year flood zones (places that statistically have a 10% or 1% chance of flooding during a 12 month period) into OSM is a good idea. The OSM database is based on individual mappers, usually volunteers, entering data based on what they can see when they visit a place, or what they can see on aerial imagery. It would be difficult for individual mappers to confirm if a 10 or 100 year floodplain was entered incorrectly. In contrast, it's easier for mappers to verify if a tag like flood_prone=yes is correct on a highway if there are signs that say "flash flood area" or "floodway" or similar, or if the area floods after every heavy rain and this is common local knowledge. Joseph Eisenberg On 8/31/19, Graeme Fitzpatrick <[email protected]> wrote: > On Sat, 31 Aug 2019 at 13:23, Immaculate Mwanja < > [email protected]> wrote: > >> >> After collecting all the information, we decided we should upload them in >> OSM to be shared with the world since it was a successful project to some >> extent. The challenge came when we could not upload these data since >> there >> is no specific tag to use for amenities or AoIs affected by floods, the >> only tag that we could find is flood_prone=yes >> <https://wiki.openstreetmap.org/wiki/Key:flood_prone> but this is mostly >> applicable to “roads/ways" that go underwater after heavy rains. >> > Had a read of the tag & while it does say roads & ways, I can't really see > any reason why you couldn't use it for other POIs? > > Thanks > > Graeme > _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
