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geography glossary |
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ONS Geography
ONS Geography is the geographic support service of the Office for National Statistics (ONS).
Further information on ONS Geography.
ONS Geography User Guide
The ONS Geography User Guide provides a record of administrative area boundary changes in England and Wales between the 1991 Census and the 2001 Census.
Full product information; product available online.
Ordnance Survey
Ordnance Survey is the national mapping agency for Great Britain.
Ordnance Survey website: Further information.
Ordnance Survey ADDRESS-POINT Reference (OSAPR)
Ordnance Survey ADDRESS-POINT References (OSAPRs) are the unique reference number given to every postal address in ADDRESS-POINT®.
Ordnance Survey of Northern Ireland (OSNI)
Ordnance Survey of Northern Ireland (OSNI) is the national mapping agency for Northern Ireland.
OSNI website: Further information.
OS MasterMap
OS MasterMap is Ordnance Survey's intelligent digital map of Great Britain. It contains a wide range of different layers of mapping data and is designed for use with geographic information systems (GIS) and database systems. OS MasterMap is the branded product of the Digital National Framework (DNF).
Ordnance Survey website: Further information.
Outer London
Outer London refers to the part of Greater London falling outside the boundaries of the former London County, which existed from 1889 to 1965. The Outer London area includes 19 of the London boroughs.
Map of Greater London showing the inner and outer London boroughs (457Kb pdf).
Output Area (OA)
Output Areas (OAs) are used across the UK as the base unit of census output. They were introduced in Scotland in 1991 and the rest of the UK in 2001. They superseded Census Enumeration Districts (EDs), although EDs are still used for census data collection.
Further information on the UK Census and census geography.
This page last revised: Tuesday, 11 April 2006
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