<div dir="ltr"><div>I spotchecked changesets by NonnEmiliaService (I suppose that this is an account NonnEmilia used for imports). <br></div><div>I looks he imported thousands of trees with type=boad_leaved (subsequently corrected by another user).</div><div>So this seems not to be regarding the present discussion.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 19 Aug 2021 at 23:51, Frederik Ramm <<a href="mailto:frederik@remote.org">frederik@remote.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi,<br>
<br>
On 8/18/21 20:36, Casper Kersten wrote:<br>
> I discovered that there are over 36,000 trees tagged with type=*<br>
<br>
...<br>
<br>
> I propose to retag many of the type=* tags on trees to other common <br>
> tagging schemes <br>
<br>
Any such analysis should not simply look at what currently is in OSM and <br>
modify it; doing this thoroughly requires looking at the history in <br>
order to answer questions like:<br>
<br>
* how did these type tags get into OSM?<br>
* are there perhaps people who will continue to add these tags even if <br>
we superficially "fix" things?<br>
* are there processes or programs or instructions somewhere that lead <br>
people to add these?<br>
* have there been other cleanup efforts?<br>
<br>
A look at *current* data does not answer these questions sufficiently as <br>
later edits by other people might have distorted the picture.<br>
<br>
A cursory glance at the history tells me that a total of 585.000 trees <br>
with a type=* tag have been added to OSM over its lifetime; if you say <br>
that only 36.000 of them remain seems to indicate that some amount of <br>
cleaning has already been going on. This should be investigated more <br>
closely.<br>
<br>
The very first occurrence of a type=* tag on a tree was <br>
<a href="https://www.openstreetmap.org/node/16949837" rel="noreferrer" target="_blank">https://www.openstreetmap.org/node/16949837</a> in 2008; a comment in the <br>
current version of that object points to a previous mechanical edit by a <br>
German user and a discussion here <br>
<a href="https://forum.openstreetmap.org/viewtopic.php?pid=613129" rel="noreferrer" target="_blank">https://forum.openstreetmap.org/viewtopic.php?pid=613129</a> - that (German) <br>
discussion also contains the sentence "others have tried this already <br>
and their edits were reverted on formal grounds" - something I have no <br>
recollection of but I assume traces of this will be in the data.<br>
<br>
It appears the these are the top 20 users who have added trees with a <br>
type=* tag:<br>
<br>
scubbx_ogdvienna_trees: 122201<br>
NonnEmiliaService: 87700<br>
Manel Clos: 78735<br>
Badarau Andrei: 32332<br>
geodz: 17366<br>
Der Troisdorfer: 7576<br>
miha12: 6729<br>
elmarburke: 6546<br>
Elwood: 5562<br>
nickrosencrans: 4708<br>
whb: 4383<br>
michalgt86: 4310<br>
S-Man42: 3996<br>
Val: 3775<br>
Ross Aldrich: 3730<br>
black_bike: 3715<br>
KartoGrapHiti: 3688<br>
RatZillaS: 3285<br>
Marcel Herault: 3283<br>
biker@gf: 2867<br>
<br>
It appears that these are the top 20 changesets responsible for adding <br>
trees with a type=* tag:<br>
<br>
c5007703: 78726<br>
c14113662: 49704<br>
c14112119: 49387<br>
c14115324: 23110<br>
c14801900: 19999<br>
c14801328: 19996<br>
c14802114: 19995<br>
c14801687: 19942<br>
c41296950: 8243<br>
c20636106: 6546<br>
c19945683: 4659<br>
c41264076: 4317<br>
c14801233: 3884<br>
c14800963: 3884<br>
c14337471: 2827<br>
c6841834: 2748<br>
c41153982: 1878<br>
c10008409: 1724<br>
c41546930: 1494<br>
c8851144: 1399<br>
<br>
Most of these are likely imports; it would probably make sense to make <br>
contact with the importers to make sure they don't run some sort of <br>
automatic update that might re-introduce type tags, and/or if their <br>
scripts are somewhere public they should be encouraged to fix them.<br>
<br>
All this is a lot more work than simply running Overpass and JOSM and <br>
replacing a few tags, but in my opinion, without proper analysis of the <br>
root of the problem, it's just cosmetics of little value.<br>
<br>
Bye<br>
Frederik<br>
<br>
-- <br>
Frederik Ramm ## eMail <a href="mailto:frederik@remote.org" target="_blank">frederik@remote.org</a> ## N49°00'09" E008°23'33"<br>
<br>
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</blockquote></div>