Geological Survey of Great Britain (England and Wales) Great Britain. Ordnance Survey. Sheet 328 drift. North Decimal Degree 50.8333. South Decimal Degree 50.6667. East Decimal Degree -2.0833. West Decimal Degree -002.500000. Relief shown by contour interval and spot heights.Transverse Mercator projection. National grid system. "Original Geological Survey on the one-inch scale by H. W. Bristow, Published on Sheets 15, 16, 17, 18 Old Series, 1850-56. Resurveyed, on the six-inch scale, by Clement Reid, et al. Published, with Drift, Sept. 1898.".