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Historic map summary

The table below provides a summary of the maps available through Historic Digimap. It includes the following fields:

  • Landmark Epoch The name assigned by Landmark Information Group to each “layer” they have created, grouped in most cases by map series, edition and/or scale. Landmark refer to each group of maps as an “Epoch”.

  • Map Series / Category Name A descriptive name for each of the Landmark “Epochs”

  • Scale/s The scale or scales of maps grouped in each Landmark “Epoch”

  • Publishing Date Range The earliest and latest publishing date within each “Epoch”

  • Notes and Coverage Additional information and links to Coverage Maps showing the geographic availability of maps in each “Epoch”

Landmark Epoch Map Series/ Category Name Scale/s Publishing Date Range Notes and Coverage
Epoch 1 County Series Survey 1:2,500 1:10,560 (“6 inch to the mile”) 1854-1901 1846-1899 First Edition County Series maps. These are available as original County Series map sheets (rectangular) and as National Grid square tiles (each tile sheet may contain parts of up to 6 original County Series map sheets). 1:2,500 coverage: high, but coverage poor in North East England, Dumfries and Galaway and North West Scotland (no high land areas mapped). View coverage map 1:10,560 coverage: very high, currently no maps for Perthshire and parts of Isles of Lewis/Harris.
Epoch 2 County Series 1st Revision 1:2,500 1:10,560 (“6 inch to the mile”) 1893-1915 1888-1914 First revision of County Series maps. These are available as original County Series map sheets (rectangular) and as National Grid square tiles (each tile sheet may contain parts of up to 6 original County Series map sheets). 1:2,500 coverage: high, but coverage poor in North Yorkshire, parts of South East England and North West Scotland (no high land areas mapped). View coverage map 1:10,560 coverage: very high, currently no maps for Shetland Isles.
Epoch 3 County Series 2nd Revision 1:2,500 1:10,560 (“6 inch to the mile”) 1906-1939 1903-1949 Second revision of County Series maps. These are available as original County Series map sheets (rectangular) and as National Grid square tiles (each tile sheet may contain parts of up to 6 original County Series map sheets). 1:2,500 coverage: medium. View coverage map 1:10,560 coverage: high, but poor coverage in Cornwall, Wales, North West Scotland, Scottish/English border, Lincolnshire.
Epoch 4 County Series 3rd Revision 1:2,500 1:10,560 (“6 inch to the mile”) 1924-1949 1922-1969 Third revision of County Series maps. These are available as original County Series map sheets (rectangular) and as National Grid square tiles (each tile sheet may contain parts of up to 6 original County Series map sheets). 1:2,500 coverage: low, concentrated in urban areas. View coverage map 1:10,560 coverage: medium.
Epoch A5 National Grid overhaul and re-survey (Edition A) 1:1,250 1:2,500 1943-1993 1943-1995 Represents “Edition A” maps - i.e. the first post World War Two National Grid large scale maps. 1:1,250 in urban areas only. Some areas mapped at 1:1,250 in later editions are mapped at 1:2,500 in Edition A. 1:1,250 coverage: v. high - urban only View coverage map 1:2,500 coverage: v. high - not highland areas
Epoch B6 National Grid resurvey (Edition B) 1:1,250 1:2,500 1944-1993 1949-1992 Represents “Edition B” maps. Some areas mapped at 1:1,250 in later editions are mapped at 1:2,500 in Edition B. 1:1,250 coverage: high, but urban areas only. View coverage map 1:2,500 coverage: medium - areas of significant change; not highland areas
Epoch C7 National Grid resurvey (Edition C) 1:1,250 1:2,500 1946-1993 1954-1993 Represents “Edition C” maps. 1:1,250 in urban areas only. Some areas mapped at 1:1,250 in Edition C are only mapped at 1:2,500 in Editions A and B. 1:1,250 coverage: medium, urban areas only. View coverage map 1:2,500 coverage: low.
Epoch D8 National Grid resurvey (Edition D) 1:1,250 1:2,500 1951-1992 1960-1992 Represents “Edition D” maps. 1:1,250 in urban areas only. Some areas mapped at 1:1,250 in Edition D are only mapped at 1:2,500 in Editions A and B. 1:1,250 coverage: low, urban areas only. View coverage map 1:2,500 coverage: very low.
Epoch E9 National Grid resurvey (Edition E) 1:1,250 1:2,500 1953-1992 1967-1992 Represents “Edition E” maps. 1:1,250 in urban areas only. Some areas mapped at 1:1,250 in Edition E are only mapped at 1:2,500 in Editions A and B. 1:1,250 coverage: very low, urban areas only. View coverage map 1:2,500 coverage: very low.
Epoch i5 National Grid Imperial “6 inches to the mile” First Editions 1:10,560 1948-1977 Includes both “Provisional” and “Regular” First Editions. These maps use the new metric National Grid referencing system but units of measurement are imperial. Coverage: high - near to full
Epoch i6 National Grid Imperial “6 inches to the mile” 1st revision 1:10,560 1949-1981 These maps use the new metric National Grid referencing system but units of measurement are imperial. Coverage: medium - revisions only
Epoch i7 National Grid Imperial “6 inches to the mile” 2nd revision 1:10,560 1959-1982 These maps use the new metric National Grid referencing system but units of measurement are imperial. Coverage: low - revisions only
Epoch i8 National Grid Imperial “6 inches to the mile” 3rd revision 1:10,560 1967-1976 These maps use the new metric National Grid referencing system but units of measurement are imperial. Coverage: very low - revisions only
Epoch m5 National Grid 1:10,000 series Fully metric First Edition. 1:10,000 1969-1996 First fully metric 1:10,000 scale edition, replacing imperial “6 inch to the mile” National Grid maps. Coverage: Medium to high - some gaps
Epoch m6 National Grid 1:10,000 series metric First Revision 1:10,000 1973-1996 Revision of 1:10,000 scale metric edition. Coverage: low
Epoch m7 National Grid 1:10,000 metric and 1:10,560 imperial latest editions 1:10,560 and 1:10,000 scale. 1958-1996 This map “layer” contains the latest map available for each mapped location. The latest edition for any given location could be either a 1:10,560 scale imperial National Grid map (pre 1970) or a 1:10,000 scale metric National Grid map, so this “layer” is necessarily a mix of both imperial 1:10,560 and metric 1:10,000 maps. Coverage: Very high - there is a small number of “missing” maps, which show up as small white dots on the Coverage map