Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 238 drift. Great Britain. Ordnance Survey of England. North Decimal Degree 51.850000. South Decimal Degree 51.6833. East Decimal Degree -0.4000. West Decimal Degree -0.8167. In upper left margin: Ordnance Survey of Great Britain. Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. "Original geolgocial survey on the Old Series one-inch maps, published in 1861-67, with revision in parts in 1870 & 1898. Re-surveyed on the six-inch scale by A. C. G. Cameron et al, completed in 1912. Published with drift 1923.".
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