The barrel of a cannon, buried upright & projecting into the air in Roy Grove, Hampton. Major Gen. Roy used the line for Ordnance Survey triangulation

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The barrel of a cannon, buried upright and projecting into the air in Roy Grove, Hampton. The cannon marks one end of the original base line used by Major General William Roy and his team for the measurement by triangulation upon which all British Ordnance Survey maps were subsequently based. (88)

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Size: 4352px × 2904px
Location: Roy Grove, Hampton, UK
Photo credit: © David Gee 4 / Alamy / Afripics
License: Licensed
Model Released: No

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