Historical Map Data

Technical Information

Specification	Historical Map Data
Data source	Ordnance Survey 1:10 560/1:10 000 scale and 1:2500 scale County Series and superseded National Grid mapping including 1:1250 scale and Town maps
Tile coverage
1:2500 County Series	1.5 miles x 1.0 miles or 3.84 sq km
1:1250 National Grid	A, B, C, editions
1:2500 National Grid	1 km x 1 km A, B, C, editions
1:10 560 County Series (Full sheet)	6 miles x 4 miles or 61.44 sq km
1:10 560 County Series (Qtr sheet)	3 miles x 2 miles or 15.36 sq km
1:10 560/1: 10 000 National Grid	5 km x 5 km or 25 sq km
Coverage	Over 400 000 tiles covering Great Britain are available
Epochs	Epoch 1 date range 1843-1893 Epoch 2 date range 1891-1912 Epoch 3 date range 1904-1939 Epoch 4 date range 1919-1943 Epoch 5 date range from 1945
Resolution	300 dots per inch
Data structure	Raster
Transfer format	TIFF Compressed Tiled Group 4 TIFF Compressed Banded Group 4 PCX
Supply media	CD-ROM

A CD-ROM of sample Historical Map Data is now available from Landmark Information Group.