Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 137 solid. Great Britain. Ordnance Survey of England. North Decimal Degree 52.916700. South Decimal Degree 52.7500. East Decimal Degree -2.9167. West Decimal Degree -3.3333. In upper left margin: Ordnance Survey of Great Britain. Relief shown by contour interval and spot heights.Transverse Mercator projection. National grid system. "Original geological survey (on the one-inch scale) published on Old Series maps 74 S.E., 74 S.W., 60 N.E. and 60 N.W. in 1850, 1851, and 1855. Re-surveyed (on the six-inch scale) in 1911-1915 and 1919 by C. B. Wedd, et al.".