Wirral Part 4 - National Museums Liverpool
Wirral Part 4 - National Museums Liverpool
Wirral Part 4 - National Museums Liverpool
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Appendix 3 Digital Mapping<br />
Ordnance Survey map sources<br />
List of Date ranges and specific dates (shown brackets) allocated to each polygon<br />
according the date range of the mapping:<br />
Knowsley, <strong>Liverpool</strong>, Sefton, St Helens:<br />
Lancashire Ordnance Survey 6" First Edition 1850<br />
Lancashire Ordnance Survey 25" (Epoch 2) 1890-93 (1893)<br />
Lancashire Ordnance Survey 25" (Epoch 4), 1936-39 (1939)<br />
Ordnance Survey 10,000 Digital Raster Current (2003)<br />
<strong>Wirral</strong>:<br />
Cheshire Ordnance Survey 25" (Epoch 1), 1874-6 (1876)<br />
Cheshire Ordnance Survey 25" (Epoch 2), 1899 (1899)<br />
Cheshire Ordnance Survey 25" (Epoch 3), 1935-36 (1936)<br />
Ordnance Survey 10,000 Digital Raster Current (2003)<br />
Outside of the four set historic periods, maps from 'fill-in' dates were employed to<br />
enhance the historic visibility and detail of some areas where the set OS Epoch<br />
mapping was found to be incomplete.<br />
For Knowsley, <strong>Liverpool</strong>, Sefton, St Helens, these 'fill-in' maps were: the Lancashire<br />
Ordnance Survey 25" (Epoch 2) of 1907-08 (1908) and the Ordnance Survey 25"<br />
(Epoch 3) of 1927 (1927).<br />
For <strong>Wirral</strong>, the 'fill-in' maps were the Cheshire Ordnance Survey 6 " (Epoch 1) of 1892<br />
(1892) and the Ordnance Survey 25" (Epoch 3) of 1911-12 (1912).<br />
Ordnance Survey 1:10,000 Raster Mapping (2003)<br />
1:2,500 Landline (2003) used to check detail not data capture<br />
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