concrete british ordnance survey triangulation point trig
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concrete british ordnance survey triangulation point trig |
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| navigate by keyword : bench britain british coordinates elevation geodetic map mark measurement metal number ordnance pillar plate point reference survey surveying triangulation trig |
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| A concrete British Ordnance Survey triangulation point, or Trig Point. |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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