<div dir="ltr"><span id="gmail-docs-internal-guid-ba194cc7-7fff-f4f8-82b3-6d09271a727a"><h1 dir="ltr" style="line-height:1.38;margin-top:20pt;margin-bottom:6pt"><span style="font-size:20pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Key:landcover</span></h1><h2 dir="ltr" style="line-height:1.56;margin-top:17pt;margin-bottom:4pt"><span style="font-size:17pt;font-family:Georgia;color:rgb(0,0,0);font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Tags: landcover=trees & landcover=grass</span></h2><h2 dir="ltr" style="line-height:1.56;margin-top:17pt;margin-bottom:4pt"><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Usage</span><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">: The landcover key is used to describe what covers the land. Currently, the most used values are trees and grass. </span></h2><h2 dir="ltr" style="line-height:1.56;margin-top:17pt;margin-bottom:4pt;border-bottom:0.75pt solid rgb(162,169,177)"><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">What is tagged</span><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">: A landcover tag is used to map a physical area of (currently) grass or trees in two cases:</span></h2><ol style="margin-top:0pt;margin-bottom:0pt"><li dir="ltr" style="list-style-type:lower-alpha;font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><h2 dir="ltr" style="line-height:1.56;margin-top:17pt;margin-bottom:0pt"><span style="font-size:10.5pt;background-color:transparent;font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">when the human use of the land is not known, e.g. an area of grass not visibly dedicated to any purpose, or</span></h2></li><li dir="ltr" style="list-style-type:lower-alpha;font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre"><h2 dir="ltr" style="line-height:1.56;margin-top:0pt;margin-bottom:4pt;border-bottom:0.75pt solid rgb(162,169,177)"><span style="font-size:10.5pt;background-color:transparent;font-weight:400;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">when landcover differs from the implied landcover of the underlying landuse, eg a grass clearing within a forest, or patches of trees within an industrial, residential or military area.</span></h2></li></ol><p dir="ltr" style="line-height:1.38;margin-top:6pt;margin-bottom:6pt"> </p><p dir="ltr" style="line-height:1.38;margin-top:6pt;margin-bottom:6pt"><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">In this context, “underlying landuse” includes other tags which represent types of landuse such as leisure=park.</span></p><p dir="ltr" style="line-height:1.38;margin-top:6pt;margin-bottom:6pt"><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap"> </span></p><p dir="ltr" style="line-height:1.38;margin-top:6pt;margin-bottom:6pt"><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-weight:700;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Combination of landuse and landcover: </span><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Area features can have both landuse and landcover tags. The landuse indicates what the land is used for; the landcover indicates what it is covered with. </span></p><p dir="ltr" style="line-height:1.38;margin-top:6pt;margin-bottom:6pt"><span style="font-size:10.5pt;font-family:Arial;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Where landuse implies a landcover and the above two use cases are not applicable or foreseen, adding landcover is redundant. </span></p></span><br class="gmail-Apple-interchange-newline"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Fr gr Peter Elderson</div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Op di 12 mrt. 2019 om 01:02 schreef Peter Elderson <<a href="mailto:pelderson@gmail.com">pelderson@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Organized mapping is ok mapping. Mapping of landcover has been pretty decent and sensible overall, not a bunch of fanatics, no data destruction. I’ve described current mapping practice for landcover=grass and landcover=trees. It covers most of the usage including the Paraguay mapping project. <br>
<br>
It’s a movement, not a conspiracy. It’s growing despite not being rendered. <br>
<br>
Mvg Peter Elderson<br>
<br>
> Op 12 mrt. 2019 om 00:19 heeft Christoph Hormann <<a href="mailto:osm@imagico.de" target="_blank">osm@imagico.de</a>> het volgende geschreven:<br>
> <br>
>> On Monday 11 March 2019, Peter Elderson wrote:<br>
>> Sorry, 2000.<br>
> <br>
> IIRC the saying is "two wrongs does not make a right".<br>
> <br>
> Original use of tags with the landcover key, that is mappers creating a <br>
> new geometry with a landcover tag, is as follows (based on data from <br>
> 2019-02-28):<br>
> <br>
> 72848 ways/relations (more of half of these created in organized mapping <br>
> with tagging not being the free choice of the mapper)<br>
> 1310 different users<br>
> 494 of which have used the key exactly once (this, i.e. that about 1/3 <br>
> to half of the genuine active users of a tag have only used it once is <br>
> pretty standard but still this has to be kept in mind when <br>
> contemplating such numbers)<br>
> <br>
> The reason why taginfo reports only the number of users who have last <br>
> touched features with this key is not because this is particularly <br>
> meaningful information but because this can be counted quite easily <br>
> when processing a planet file (which is what taginfo does on a daily <br>
> basis) while numbers on active users (i.e. who maps features with a tag <br>
> or who adds a tag to features) can only be determined from the history.<br>
> <br>
> I can highly recommend Frederik's talk on the matter of OSM statistics <br>
> which discusses this in detail:<br>
> <br>
> <a href="https://www.youtube.com/watch?v=Kx0KuvkbvfQ" rel="noreferrer" target="_blank">https://www.youtube.com/watch?v=Kx0KuvkbvfQ</a><br>
> <br>
> -- <br>
> Christoph Hormann<br>
> <a href="http://www.imagico.de/" rel="noreferrer" target="_blank">http://www.imagico.de/</a><br>
> <br>
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</blockquote></div>