Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 113 solid and drift. Great Britain. Ordnance Survey of England. North Decimal Degree 53.250000. South Decimal Degree 53.0833. East Decimal Degree -0.7667. West Decimal Degree -1.1833. In upper left margin: Ordnance Survey of Ollerton. Relief shown by contour interval and spot heights.Transverse Mercator projection. National grid system. "Original geological survey on the one-inch scale published on the Old Series Sheet 82 S.E. (1858, additions 1879), 70 (1886) and 83 (1886). Re-surveyed on the six-inch scale in 1907-9 by J. B. Hill et al. Published with Drift 1911. Reprinted 1954.".