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According to<span> </span><a href="http://www.fao.org/3/x0596e/X0596e02a.htm#P1974_116516" target="_blank" rel="noopener noreferrer" title="http://www.fao.org/3/x0596e/X0596e02a.htm#P1974_116516" style="margin: 0px">the document you shared</a>, bare soil is
 mentioned in:<br>
<b>Primarily non-vegetated > Terrestrial > Bare areas</b></div>
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<br>
And within<span> </span><b>Bare areas</b>,<span> </span><b>Bare soil</b><span> </span>is an available category, being distinguished by<span> </span><b>Bare rock</b> whether the terrain is consolidated or not.<br>
Within<span> </span><b>Bare soil</b>, further classification is made depending on a "stoniness" percentage (5 to 40%<span> </span><b>Stony</b>, >40%<span> </span><b>Very stony</b>) and on soil macropatterns (II level).</div>
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<br>
I think this could be useful material for us to make a decision.<span> </span><b>natural=bare_soil<span> </span></b>targeting all the areas of unconsolidated ground material could be used whether or not a groundy area hasn't already a tag that suits better
 its representation (e.g. <b>natural=wetland + intermittent=yes</b>, <b>landuse=quarry</b>...).<br>
<br>
Thanks, </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size: 11pt;" data-ogsc=""><b>Da:</b> Martin Koppenhoefer <dieterdreist@gmail.com><br>
<b>Inviato:</b> mercoledì 15 luglio 2020 10:08<br>
<b>A:</b> Tag discussion, strategy and related tools <tagging@openstreetmap.org><br>
<b>Oggetto:</b> Re: [Tagging] Feature Proposal - RFC - (Ground)</font>
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<div dir="ltr" class="x_gmail_attr">Am Mi., 15. Juli 2020 um 09:45 Uhr schrieb Martin Koppenhoefer <<a href="mailto:dieterdreist@gmail.com">dieterdreist@gmail.com</a>>:<br>
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<div dir="ltr">If you are interested in reading some interesting thoughts about landcover classification, there is the FAO landcover classification system, thought to be useful globally:
<br>
<div><a href="http://www.fao.org/3/X0596E/X0596e00.htm" target="_blank">http://www.fao.org/3/X0596E/X0596e00.htm</a></div>
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</blockquote>
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<div><br>
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<div><br>
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<div>there are only 8 main classes:</div>
<div><a href="http://www.fao.org/3/X0596E/X0596e10.gif">http://www.fao.org/3/X0596E/X0596e10.gif</a></div>
<div><br>
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<div>and you can easily determine them through a decision matrix:</div>
<div>1. primarily vegetated or primarily non-vegetated?</div>
<div>2. terrestrial or aquatic/flooded regularly?<br>
</div>
<div>3. cultivated/man made/artificial or natural?</div>
<div><br>
</div>
<div>then they add additional properties like life forms, crops, leaf types, climate, ...</div>
<div><br>
</div>
<div>From the combination of these properties and classes, detailed land cover classes are determined:</div>
<div><br>
</div>
<div><br>
</div>
<div><a href="http://www.fao.org/3/x0596e/X0596e02a.htm#P1974_116516">http://www.fao.org/3/x0596e/X0596e02a.htm#P1974_116516</a></div>
<div><br>
</div>
<div>E.g. here:</div>
<div>
<p>TABLE 3.4<br>
<b>Example of the formation of land cover classes</b></p>
<table width="90%" cellspacing="0" cellpadding="5" align="center">
<tbody>
<tr valign="TOP" bgcolor="#DBECFD" data-ogsb="" style="">
<td colspan="4" rowspan="1" class="x_gmail-SJ" valign="TOP">
<p align="center"><b>EXAMPLE: "NATURAL AND SEMI-NATURAL TERRESTRIAL VEGETATION" (A12)</b></p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p><b>Classifiers used</b></p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p><b>Boolean formula</b></p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p><b>Standard class name</b></p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT"><b>Code</b></p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Life form and cover</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Closed forest</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20005</p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Height</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10B2</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>High closed forest</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20006</p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Spatial distribution</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10B2C1</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Continuous closed forest</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20007</p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Leaf type</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10B2C1D1</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Broad-leaved closed forest</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20095</p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Leaf phenology</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10B2C1D1E2</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Broad-leaved deciduous forest</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20097</p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>2nd layer: LF, C, H</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10B2C1D1E2F2F5F7G2</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Multi-layered broad-leaved deciduous forest</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20628</p>
</td>
</tr>
<tr valign="TOP">
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>3rd layer: LF, C, H</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>A3A10B2C1D1E2F2F5F7G2</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p>Multi-layer broad-leaved deciduous forest with emergents</p>
</td>
<td colspan="1" rowspan="1" class="x_gmail-J" valign="TOP">
<p align="RIGHT">20630</p>
</td>
</tr>
</tbody>
</table>
</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Martin<br>
</div>
<div><br>
</div>
<div>PS: And the best: LCCS comes as a run time application, you do not need to have virtual basic installed !!11!!!<br>
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