Locations of typicality features used to define Southampton's city centre over time

Coordinates in British National Grid of typicality features used to define the centre of Southampton, UK for 12 years from 1560 to the 2015. The map sources were: Southampton Atlas, 1560 (Sheet II) Southampton Atlas, 1611 (Sheet III) Southampton Atlas, 1791 (Sheet IX) Southampton Atlas, 1862 (Sheet XII) Elizabethan Times catalogue, 1835 (Map 19) Elizabethan Times catalogue, 1866 (Map 21) Historic Ordnance Survey map data, 1890, Epoch 2 (County Series 1st Revision) Historic Ordnance Survey map data, 1910, Epoch 3 (County Series 2nd Revision) Historic Ordnance Survey map data, 1930, Epoch 4 (County Series 3rd Revision) Historic Ordnance Survey map data, 1960, Epoch i5 (National Grid Imperial, 6 inches to the mile, First Editions) Historic Ordnance Survey map data, 1990, Epoch m7 (National Grid 1:10,000 metric and 10,560 Imperial - Latest editions) Ordnance Survey, 2015, MasterMap Topography