| Topic: | Ordnance Survey benchmarks | |
| Posted by: | Adam Tripp | |
| Date/Time: | 26/06/25 08:03:00 |
| https://www.youtube.com/watch?v=sWxXyR4ifbk I came across an interesting youtube video (3 mins) about 19th century 'benchmarks' used by Ordnance Survey to calculate elevation. Has anyone spotted any in Putney? |
| Topic | Date Posted | Posted By |
| Ordnance Survey benchmarks | 26/06/25 08:03:00 | Adam Tripp |
| Re:Ordnance Survey benchmarks | 26/06/25 08:38:00 | Judy Allen |
| Reply | 26/06/25 09:25:00 | Michael Ixer |
| Re:Ordnance Survey benchmarks | 26/06/25 11:38:00 | Sue Hammond |
| Re:Re:Ordnance Survey benchmarks | 26/06/25 12:36:00 | Philippa Bond |
| Reply | 26/06/25 14:35:00 | Michael Ixer |
| Re:Ordnance Survey benchmarks | 26/06/25 14:53:00 | Jonathan Callaway |
| Re:Re:Ordnance Survey benchmarks | 26/06/25 16:08:00 | Judy Allen |
| Re:Re:Ordnance Survey benchmarks | 26/06/25 17:36:00 | Adam Tripp |
| Re:Re:Re:Ordnance Survey benchmarks | 26/06/25 18:37:00 | Ed Robinson |
| Re:Ordnance Survey benchmarks | 27/06/25 09:15:00 | David Wilson |
| Re:Re:Ordnance Survey benchmarks | 27/06/25 10:13:00 | Adam Tripp |
| Re:Re:Re:Ordnance Survey benchmarks | 28/06/25 10:15:00 | Jonathan Callaway |