Group Information- Members: 347
- Category: Hiking
- Founded: Sep 17, 2002
- Language: English
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Description
This group is for discussion relating to Ordnance Survey triangulation pillars, flush brackets, bench marks, and other Ordnance Survey structures. The emphasis is on the historical and technical aspects, and on maintaining lists of pillars and related structures.
Photo: Elsworthy, Exmoor (grid ref SS812415) 'S5034'.
[Key words: Ordnance Survey, Ordnance Survey Ireland, Ordance Survey Northern Ireland, triangulation pillars, flush brackets, bench marks, levelling, geodetic.]
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Group Email Addresses
| Post message: |
trigonomy@yahoogroups.com |
| Subscribe: |
trigonomy-subscribe@yahoogroups.com |
| Unsubscribe: |
trigonomy-unsubscribe@yahoogroups.com |
| List owner: |
trigonomy-owner@yahoogroups.com |
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