[Talk-GB] OS Benchmarks in OSM?

[ael]

On Tue, Jan 17, 2023 at 10:21:36PM +0000, Chris Andrew wrote:
> Hi, everybody!
> 
> I've been reading about Ordnance Survey 'Benchmarks'/ Bench Marks. OS
> suggest that around 190 Fundamental Bench Marks (FBMs) exist, and
> ""approximately 500 000 'lower order' BMs":
> 
> https://www.ordnancesurvey.co.uk/benchmarks/
> 
> A downloadable archive exists, of the Benchmarks, and this is covered by
> the Open Government Licence (OGL); this appears to be compatible with OSM's
> approach:
> 
> https://wiki.openstreetmap.org/wiki/Open_Government_Licence
> 
> Does anyone know whether Benchmarks have been discussed, before? I'm
> wondering whether this is useful historic information, that could be
> verified by a StreetComplete quest.
> 
> It looks like a (proposed?) tag already exists, but I think this needs
> expanding slightly, to distinguish between Fundamental Bench Marks (FBMs)
> and other Bench Marks.
> 
> https://wiki.openstreetmap.org/wiki/Tag:type%3Dbenchmark
> 
> A quick check of the tag page would suggest that we haven't quite mapped
> all of the BMs.

That wiki page seems to be largely empty. I have mapped at least a
couple of gps benchmarks, but I don't seem to have used 3Dbenchmark
probably because it did not exist back then, or I knew nothing about
it.

After consulting that wiki page, I am none the wiser. I assume that
I would need to look at the OS pages.

One of mine was 
https://www.openstreetmap.org/node/2513244479
and the changeset comment there reminds me that there was a discussion
on this list.
Another was https://www.openstreetmap.org/node/472420260
and again I did not use 3Dbenchmark for whatever reason.

ael