Summary of Maps, Scales and Dates

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



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. View coverage map
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. View coverage map
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. View coverage map
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. View coverage map
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 View coverage map
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 View coverage map
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. View coverage map
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. View coverage map
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. View coverage map
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 View coverage map
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 View coverage map
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 View coverage map
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 View coverage map
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 View coverage map
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 View coverage map
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