<html><head></head><body>High water is commonly used in terms of tides. <br>
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Phil (trigpoint) <br><br><div class="gmail_quote">On 25 July 2018 13:05:56 BST, Robert Szczepanek <robert@szczepanek.pl> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="k9mail">Hi all,<br><br>We work on flood marks project [13] and your opinion on proper tagging <br>is crucial for us, as database of existing features is based on OSM <br>records. We have identified probably most of existing marks in Poland, <br>but would like to finally unify tagging within OSM project.<br><br>Both terms (flood mark and high water mark) can be treated as synonyms <br>[1][2].<br>High water mark is more popular in USA [3][4], while flood mark in <br>Europe [5][6]. But this is not a rule [7].<br><br>Why "flood mark" term is better in our opinion?<br>1. "Flood" term is shorter and easier to understand worldwide compared <br>to "high water".<br>2. Flood mark is more popular in scientific publications [8, 9, 10]. <br>References are from "Hydrology and Earth System Sciences", one of the <br>best hydrological journals [11].<br>3. "High-water mark" term is used also in economy and has another <br>meaning [12].<br>4. All additional keys usually contain "flood", not "high water" term. <br>Like "flood_date". It will be more consistent.<br><br>In OSM database there are now:<br>- 262 features with flood_mark=yes [14]<br>- 80 features with historic=highwater_mark [16]<br>- 20 features with high_water_mark=yes [15]<br><br>Question 1:<br>a/ flood_mark<br>b/ high_water_mark<br>c/ highwater_mark<br><br>Question 2:<br>Which tagging convention should we follow:<br>a/ flood_mark=yes + historic=memorial + memorial:type=flood_mark<br>b/ historic=flood_mark + flood_mark:type=(plaque, painted, ...)<br>c/ historic=highwater_mark<br><br>Not every flood mark is a memorial, so probably 2.a/ is not the optimal <br>option. Short discussion about this can be found here [17].<br><br>Thank you for help,<br>Robert<br><br><br>References<br>[1] <a href="http://floodlist.com/dealing-with-floods/flood-high-water-marks">http://floodlist.com/dealing-with-floods/flood-high-water-marks</a><br>[2] <br><a href="https://theconversation.com/historical-record-shows-these-floods-are-no-high-water-mark-23266">https://theconversation.com/historical-record-shows-these-floods-are-no-high-water-mark-23266</a><br>[3] <a href="https://www.weather.gov/gld/1935flood-hwmarks">https://www.weather.gov/gld/1935flood-hwmarks</a><br>[4] <a href="https://www.fema.gov/high-water-mark-initiative">https://www.fema.gov/high-water-mark-initiative</a><br>[5] <br><a href="https://www.ceh.ac.uk/news-and-media/news/ceh-experts-contribute-environment-agency-report-feh-local-flood-frequency-estimation">https://www.ceh.ac.uk/news-and-media/news/ceh-experts-contribute-environment-agency-report-feh-local-flood-frequency-estimation</a><br>[6] <br><a href="http://www.studia.photos/england/oxford-oxfordshire-england-uk/attachment/flood-marks-osney-lock-river-thames-oxford-oxfordshire-england-uk/">http://www.studia.photos/england/oxford-oxfordshire-england-uk/attachment/flood-marks-osney-lock-river-thames-oxford-oxfordshire-england-uk/</a><br>[7] <br><a href="https://www.alamy.com/stock-photo-flood-level-hight-marks-on-st-margarets-church-porch-kings-lynn-norfolk-11448961.html">https://www.alamy.com/stock-photo-flood-level-hight-marks-on-st-margarets-church-porch-kings-lynn-norfolk-11448961.html</a><br>[8] <a href="https://www.hydrol-earth-syst-sci.net/19/3517/2015/hess-19-3517-2015.pdf">https://www.hydrol-earth-syst-sci.net/19/3517/2015/hess-19-3517-2015.pdf</a><br>[9] <br><a href="https://www.hydrol-earth-syst-sci-discuss.net/12/6541/2015/hessd-12-6541-2015.pdf">https://www.hydrol-earth-syst-sci-discuss.net/12/6541/2015/hessd-12-6541-2015.pdf</a><br>[10] <br><a href="https://www.hydrol-earth-syst-sci.net/18/4029/2014/hess-18-4029-2014.pdf">https://www.hydrol-earth-syst-sci.net/18/4029/2014/hess-18-4029-2014.pdf</a><br>[11] <a href="https://www.scimagojr.com/journalsearch.php?q=hydrology">https://www.scimagojr.com/journalsearch.php?q=hydrology</a><br>[12] <a href="https://www.investopedia.com/terms/h/highwatermark.asp">https://www.investopedia.com/terms/h/highwatermark.asp</a><br>[13] <a href="http://openhydrology.org/maps/flood_mark/">http://openhydrology.org/maps/flood_mark/</a><br>[14] <a href="https://wiki.openstreetmap.org/wiki/Key:flood_mark">https://wiki.openstreetmap.org/wiki/Key:flood_mark</a><br>[15] <a href="https://wiki.openstreetmap.org/wiki/Key:high_water_mark">https://wiki.openstreetmap.org/wiki/Key:high_water_mark</a><br>[16] <a href="https://wiki.openstreetmap.org/wiki/Tag:historic%3Dhighwater_mark">https://wiki.openstreetmap.org/wiki/Tag:historic%3Dhighwater_mark</a><br>[17] <a href="https://wiki.openstreetmap.org/wiki/Talk:Tag:historic%3Dhighwater_mark">https://wiki.openstreetmap.org/wiki/Talk:Tag:historic%3Dhighwater_mark</a><br><br><hr><br>Tagging mailing list<br>Tagging@openstreetmap.org<br><a href="https://lists.openstreetmap.org/listinfo/tagging">https://lists.openstreetmap.org/listinfo/tagging</a><br></pre></blockquote></div><br>
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