Hi all,
We work on flood marks project [13] and your opinion on proper tagging
is crucial for us, as database of existing features is based on OSM
records. We have identified probably most of existing marks in Poland,
but would like to finally unify tagging within OSM project.
Both terms (flood mark and high water mark) can be treated as synonyms
[1][2].
High water mark is more popular in USA [3][4], while flood mark in
Europe [5][6]. But this is not a rule [7].
Why "flood mark" term is better in our opinion?
1. "Flood" term is shorter and easier to understand worldwide compared
to "high water".
2. Flood mark is more popular in scientific publications [8, 9, 10].
References are from "Hydrology and Earth System Sciences", one of the
best hydrological journals [11].
3. "High-water mark" term is used also in economy and has another
meaning [12].
4. All additional keys usually contain "flood", not "high water" term.
Like "flood_date". It will be more consistent.
In OSM database there are now:
- 262 features with flood_mark=yes [14]
- 80 features with historic=highwater_mark [16]
- 20 features with high_water_mark=yes [15]
Question 1:
a/ flood_mark
b/ high_water_mark
c/ highwater_mark
Question 2:
Which tagging convention should we follow:
a/ flood_mark=yes + historic=memorial + memorial:type=flood_mark
b/ historic=flood_mark + flood_mark:type=(plaque, painted, ...)
c/ historic=highwater_mark
Not every flood mark is a memorial, so probably 2.a/ is not the optimal
option. Short discussion about this can be found here [17].
Thank you for help,
Robert
References
[1] http://floodlist.com/dealing-with-floods/flood-high-water-marks
[2]
https://theconversation.com/historical-record-shows-these-floods-are-no-high-water-mark-23266
[3] https://www.weather.gov/gld/1935flood-hwmarks
[4] https://www.fema.gov/high-water-mark-initiative
[5]
https://www.ceh.ac.uk/news-and-media/news/ceh-experts-contribute-environment-agency-report-feh-local-flood-frequency-estimation
[6]
http://www.studia.photos/england/oxford-oxfordshire-england-uk/attachment/flood-marks-osney-lock-river-thames-oxford-oxfordshire-england-uk/
[7]
https://www.alamy.com/stock-photo-flood-level-hight-marks-on-st-margarets-church-porch-kings-lynn-norfolk-11448961.html
[8] https://www.hydrol-earth-syst-sci.net/19/3517/2015/hess-19-3517-2015.pdf
[9]
https://www.hydrol-earth-syst-sci-discuss.net/12/6541/2015/hessd-12-6541-2015.pdf
[10]
https://www.hydrol-earth-syst-sci.net/18/4029/2014/hess-18-4029-2014.pdf
[11] https://www.scimagojr.com/journalsearch.php?q=hydrology
[12] https://www.investopedia.com/terms/h/highwatermark.asp
[13] http://openhydrology.org/maps/flood_mark/
[14] https://wiki.openstreetmap.org/wiki/Key:flood_mark
[15] https://wiki.openstreetmap.org/wiki/Key:high_water_mark
[16] https://wiki.openstreetmap.org/wiki/Tag:historic%3Dhighwater_mark
[17] https://wiki.openstreetmap.org/wiki/Talk:Tag:historic%3Dhighwater_mark
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