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Ordnance Survey Geospatial datasets
Description The British Library maintains an archive of large-scale mapping of the nation in digital format, since 1998 for Ordnance Survey (OS) and 2004 for OS Northern Ireland (OSNI). These geospatial databases are voluntarily deposited with all of the UK Legal Deposit Libraries (LDL) annually.

 The six UK LDLs began acquiring Ordnance Survey's Land-Line™, their initial electronic mapping data product in NTF format, in 1998. Keeping pace with technological advancements in geospatial data production and management, Ordnance Survey replaced that product with a feature-based, GML-based mapping product, OS MasterMap™, in 2006. The born-digital cartographic datasets embody the cutting edge of geographic technology and make OS a pioneer in national mapping.

Ordnance Survey MasterMap™ digital map data contains numerous layers when purchased commercially, but the LDLs receive two layers: Topography and ITN. The Topography Layer of seamless, color digital mapping identifies and datestamps each feature on the landscape uniquely, and includes land area classifications; buildings; roads, tracks and paths; rail; water; terrain and height; heritage and antiquities; structures; and administrative boundaries. The Integrated Transport Network Layer offers a detailed digital map for Great Britain 's road structure and classifications. While the Address and Imagery layers of OSMM are not deposited, the LandForm PROFILE dataset, surveyed at 1:10,000, provides contour lines and height information.

Licensing TBC
Owner British Library
Dataset Location Onsite access only
Collection expert Maureen Pennock. The Library's Digital Maps curator is Kimberley Kowal
Issues brainstorm TBC 
List of Issues TBC 

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