<div dir="auto">Thanks, Dave; I didn't think to do that, on my quick look.<div dir="auto"><br></div><div dir="auto">Chris.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 17 Jan 2023, 22:50 Dave F, <<a href="mailto:davefoxfac63@btinternet.com">davefoxfac63@btinternet.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi<br>
<br>
It gets discussed every now & again.<br>
<br>
Best start with man_made=survey_point & do some further filtering from <br>
there. On the discussion page of benchmarks there appears to be some <br>
disagreement in how to tag individual items (quelle surprise).<br>
<br>
<a href="https://overpass-turbo.eu/s/1qgZ" rel="noreferrer noreferrer" target="_blank">https://overpass-turbo.eu/s/1qgZ</a><br>
<br>
Cheers<br>
DaveF<br>
<br>
On 17/01/2023 22:21, Chris Andrew wrote:<br>
> Hi, everybody!<br>
><br>
> I've been reading about Ordnance Survey 'Benchmarks'/ Bench Marks. OS <br>
> suggest that around 190 Fundamental Bench Marks (FBMs) exist, and <br>
> ""approximately 500 000 'lower order' BMs":<br>
> <a href="https://www.ordnancesurvey.co.uk/benchmarks/" rel="noreferrer noreferrer" target="_blank">https://www.ordnancesurvey.co.uk/benchmarks/</a><br>
><br>
> A downloadable archive exists, of the Benchmarks, and this is covered <br>
> by the Open Government Licence (OGL); this appears to be compatible <br>
> with OSM's approach:<br>
><br>
> <a href="https://wiki.openstreetmap.org/wiki/Open_Government_Licence" rel="noreferrer noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Open_Government_Licence</a><br>
><br>
> Does anyone know whether Benchmarks have been discussed, before? I'm <br>
> wondering whether this is useful historic information, that could be <br>
> verified by a StreetComplete quest.<br>
><br>
> It looks like a (proposed?) tag already exists, but I think this needs <br>
> expanding slightly, to distinguish between Fundamental Bench Marks <br>
> (FBMs) and other Bench Marks.<br>
><br>
> <a href="https://wiki.openstreetmap.org/wiki/Tag:type%3Dbenchmark" rel="noreferrer noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Tag:type%3Dbenchmark</a><br>
><br>
> A quick check of the tag page would suggest that we haven't quite <br>
> mapped all of the BMs.<br>
><br>
> Before this goes any further, I just wanted to sound out the list, to <br>
> see whether we've already been around this buoy.<br>
><br>
> Many thanks,<br>
><br>
> Chris Andrew<br>
> chris_debian<br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
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<br>
</blockquote></div>