Historic Mapping

Cassini and Ordnance Survey historic mapping at a range of scales.

Cassini old series 1805-1874 map

Cassini Old Series

Dating from 1805 -1874, georeferenced high quality reproduction of OS one-Inch ('Old series') maps, reprojected to match OS Landranger (1:50,000) series.

Product Details

The mapping used the Cassini projection, which was to be the projection most commonly employed by the Ordnance Survey until the 1940s. Due to the projection differences used across GB and the lower degree of accuracy thanks to the technology of the time, customers should expect that data will not always match up with contemporary mapping.

It soon became clear that the policy of using a meridian of 3ºW for the western maps and Greenwich's 0º for the eastern ones would lead to a convergence between the sheets that would increase as the survey progressed north. Map sheets in central England became progressively more trapezoid in shape as they progress north, rather than the usual rectangular shape. It was eventually decided to use new meridian through the origin of Delamere Forest in Cheshire. This convergence, and the new base line (the Preston to Hull line), which was perpendicular to the meridian through Delamere, can be seen on the Old Series index map.

Technical Details

Supplier
Cassini
Coverage
GB
Scale
1:50,000
Formats Available
TIFF, PNG, BMP
Licence Options
Annual
Delivery Timescale
within minutes

Related Products

Groundsure Map InsightOS 1:50 000 Raster

Download Samples

Cassini Revised New Series (1897-1904) map

Cassini Revised New Series

Dating from 1897-1904, georeferenced high quality reproduction of OS one-Inch ('Revised New Series') maps, reprojected to match OS Landranger series.​

Product Details

The original paper maps were based on individual county projections and due to the projection differences used across GB and the lower degree of accuracy thanks to the technology of the time, customers should expect that data will not always match up with contemporary mapping.

Technical Details

Supplier
Cassini
Coverage
GB
Scale
1:50,000
Formats Available
TIFF, PNG, BMP
Licence Options
Annual
Delivery Timescale
within minutes

Related Products

Groundsure Map InsightOS 1:50 000 Raster

Download Samples

Cassini Popular Edition 1919-1926 map

Cassini Popular Edition

Dating from 1919-1926, georeferenced high quality reproduction of OS one-Inch ('Popular Edition') maps, reprojected to match OS Landranger series.

Product Details


The original paper maps were based on individual county projections and due to the projection differences used across GB and the lower degree of accuracy thanks to the technology of the time, customers should expect that data will not always match up with contemporary mapping.

Technical Details

Supplier
Cassini
Coverage
GB
Scale
1:50,000
Formats Available
TIFF, PNG, BMP
Licence Options
Annual
Delivery Timescale
within minutes

Related Products

Groundsure Map InsightOS 1:50 000 Raster

Download Samples

Cassini New Popular Edition 1945-1948

Cassini New Popular Edition

Dating from 1945-1948, georeferenced high quality reproduction of OS one-Inch ('New Popular Edition') maps, reprojected to match OS Landranger series.

Product Details

The original paper maps were based on individual county projections and due to the projection differences used across GB and the lower degree of accuracy thanks to the technology of the time, customers should expect that data will not always match up with contemporary mapping.

Technical Details

Supplier
Cassini
Coverage
GB
Scale
1:50,000
Formats Available
TIFF, PNG, BMP
Licence Options
Annual
Delivery Timescale
within minutes

Related Products

Groundsure Map InsightOS 1:50 000 Raster

Download Samples

Groundsure MapInsight report

Groundsure Map Insight

Map Insight PDF map packs containing the full range of historic maps of your area of interest, ​at large scales.

Product Details

Mapinsight Packs are made up of A3 extracts of all available superseded Ordnance Survey maps (from the scales and maps as available to Groundsure from the copyright library used to scan the material) at a variety of scales (including 1:10000, 1:10560, 1:2500, 1:1250) supplied in PDF.

These map packs give the user an historical review of mapping back to around 1840. With full colour scans of source material at 508dpi and PDF output at 600dpi these map packs set a new standard in quality, clarity and interpretability for the environmental professional.

1:10 000 / 1:10 560 scale - there are typically 7 editions for any area

1:2500 / 1:1250 scale - typically 6 editions for any area

Urban areas are more frequently covered; 1:1250 scale only available for "urban" areas. Areas of greater population and change tend to have more mapping editions.

 

Technical Details

Supplier
GroundSure
Coverage
GB
Scale
1:2500 and 1:10,000
Formats Available
PDF, TIFF
Licence Options
Perpetual
Delivery Timescale
within 4 working hours

Related Products

Download Samples