Hi Chris, thanks for the reply. Is your work also around OS trigpoint data, or some other dataset? Licensing indeed - back in 2016 @gregrs approached the OS (it's listed on the wiki page for trigpoints), and their response at that time was positive: https://wiki.openstreetmap.org/wiki/User:Gregrs/Ordnance_Survey_triangulation_stations/Licence_emails
I'm starting with the presumption that that still holds - but we should indeed verify that before an import, no doubt in the import proposal page phase. Graham On Tue, 9 Jun 2026 at 13:19, Chris Andrew <[email protected]> wrote: > Hi, Graham. > > Just for wider knowledge, I'm doing some work at the moment, along similar > lines, but in support of an app, not a bulk import. > > Stating the obvious, before any bulk imports are considered, the source > data licensing would need to be checked. > > I suspect people have been round this bouy a few times, so I'll step back, > now. > > Chris > chris_debian > > On Tue, 9 Jun 2026, 12:01 , <[email protected]> wrote: > >> Send Talk-GB mailing list submissions to >> [email protected] >> >> To subscribe or unsubscribe via the World Wide Web, visit >> https://lists.openstreetmap.org/listinfo/talk-gb >> or, via email, send a message with subject or body 'help' to >> [email protected] >> >> You can reach the person managing the list at >> [email protected] >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of Talk-GB digest..." >> Today's Topics: >> >> 1. Revisiting OS trigpoints - viability of importing? () >> >> >> >> ---------- Forwarded message ---------- >> From: Graham Whaley <[email protected]> >> To: [email protected] >> Cc: >> Bcc: >> Date: Tue, 9 Jun 2026 11:55:01 +0100 >> Subject: [Talk-GB] Revisiting OS trigpoints - viability of importing? >> Hello, >> first time poster here. I've done a very few small submissions to OSM in >> the past (user gwhaley), and just restarted updating small items around my >> location (having spotted some new bins and benches etc. appearing). >> >> During that work I realised the trigpoints near me are not in OSM, which >> led me down the path to this very useful wiki page from @gregrs around 2016: >> https://wiki.openstreetmap.org/wiki/Ordnance_Survey_triangulation_stations >> and a small related discussion on the list around 2019: >> https://lists.openstreetmap.org/pipermail/talk-gb/2019-July/023176.html >> >> This inspired me to grab the current datasets and do some crunching. I've >> posted my code and findings on github at: >> https://github.com/grahamwhaley/OSM_UK_trigpoints >> >> I'd like to discuss if the community think it is viable to import a bunch >> of OS trigpoint data? I think it is. I don't think we could automate every >> trigpoint found in the OS data (see below and/or the github page for >> details), but I think there is scope to import the vast majority of OS >> trigpoints as nodes. Of course any import would follow the path of >> following the import guidelines, writing an import plan and >> approaching/announcing to the wider community before any automation >> occurred. I'd also fully expect to do some dry runs and some smaller region >> imports before doing the bulk of the data. I'd also gladly welcome any >> help, reviews etc. >> >> I'll drop a few statistics here... >> >> - The OS trigpoint database has 6081 'live' pillars >> - The OSM database has 2804 items purporting to be trigpoints - 2560 >> after some filtering >> - The OS benchmark data (which gives us FlushBracket numbers) has 3703 >> useable entries >> >> After some data crunching and filtering (see the github page - but I >> fully expect to adapt and refine the current code), we end up with the 6081 >> OS nodes being classified into the following groups: >> >> - 60 OS entries that seem to align with existing OSM entries so likely >> need no or little change >> - 4440 potential 'new' OSM trigpoint entries - entries from the OS data >> that do not seem to align with any existing OSM nodes >> - 246 'editable' entries, where an OS entry nearly aligns with an OSM >> entry, but we could 'coerce' the OSM entry to match the OS entry >> - 1335 entries that could do with human review - the OS and OSM entries >> are both similar and different (for example, might have matching names but >> different FB numbers), and we could try and figure out why and what to do >> in each instance. >> >> I have some ideas about how to proceed, but obviously would like >> community input. My overview thoughts are: >> >> - Adding the 4440 'new' OS trigpoints feels like the least risk, as it >> would not be trying to duplicate or modify any existing OSM nodes >> - The 'editable' nodes might be moderately easy to apply after a fairly >> thorough human review of the changes. >> - The 1335 entries that could do with human review - maybe we can get >> them on a >> site like/similar to Survey Me or FHODOT to make them accessible for >> ongoing community review. >> >> Many thanks, >> Graham >> >> _______________________________________________ >> Talk-GB mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/talk-gb >> > _______________________________________________ > Talk-GB mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-gb >
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