Census Output Areas Population Weighted Centroids 2011

This dataset shows the 2011 Census Output Areas (OAs) Population Weighted Centroids.


An individual Output Area generally covers a sufficiently small area (subject to meeting minimum population / household counts) so that user defined or ad-hoc areas can be created while maintaining a sufficient level of quality. National Records of Scotland (NRS) produces only one set of OAs and creates all other output geographies using the OA as the building brick. Each OA is assigned to an area in a higher geography by first selecting one of the postcodes in the OA as a ‘master’ postcode. The OA inherits all of the characteristics of the master postcode including its assignments to higher areas and its grid reference.


The master postcode was selected using an algorithm which calculates the postcode centroid within an OA which has grid references closest to the population-weighted centre of the OA.


An anomaly was discovered in the 2011 Census Output Area (OA) codes which were published on 15 August 2013. The anomaly meant that, whilst all the current 2011 Census OA codes were unique, they did not always run in sequential order by council area. We decided to replace the codes with new ones that start at S00088956 and end with S00135306.

 
Citation proposal
(2013) . Census Output Areas Population Weighted Centroids 2011. Scottish Government https://services.mspdata.eu:/geonetwork/srv/api/records/9d977a73-7884-4870-ae76-afccf8e6fae8

Simple

Alternate title
Date ( Creation )
2013-08-15
Date ( Revision )
2013-09-13
Date ( Publication )
2013-09-13
Identifier

www.nrscotland.gov.uk

/

OutputArea2011_PWC

  Distributor

  Owner

  Publisher

Maintenance and update frequency
asNeeded As needed
GEMET - INSPIRE themes, version 1.0 ( Theme )

  • Statistical units

Access constraints
otherRestrictions Other restrictions
Other constraints

Licence

Use limitation

No conditions apply

Distance
0.000125  urn:ogc:def:uom:EPSG::9001
Denominator
10000
Metadata language
eng English
Topic category
  • Boundaries
N
S
E
W


Supplemental Information
Reference system identifier

EPSG

/

OSGB 1936 / British National Grid (EPSG:27700)

/

7.4

Distribution format

  • Pointfile

    (

    ArcGIS 10

    )

  • WMS

    (

    1.3.0

    )

OnLine resource
National Records of Scotland website  

Geography – 2011 Census Boundaries

Hierarchy level
dataset Dataset
Statement

This dataset shows the 2011 Census Output Areas (OAs) Population Weighted Centroids.


An individual Output Area generally covers a sufficiently small area (subject to meeting minimum population / household counts) so that user defined or ad-hoc areas can be created while maintaining a sufficient level of quality. National Records of Scotland (NRS) produces only one set of OAs and creates all other output geographies using the OA as the building brick. Each OA is assigned to an area in a higher geography by first selecting one of the postcodes in the OA as a ‘master’ postcode. The OA inherits all of the characteristics of the master postcode including its assignments to higher areas and its grid reference.


This dataset shows the 2011 Census Output Areas (OAs) Population Weighted Centroids.


An individual Output Area generally covers a sufficiently small area (subject to meeting minimum population / household counts) so that user defined or ad-hoc areas can be created while maintaining a sufficient level of quality. National Records of Scotland (NRS) produces only one set of OAs and creates all other output geographies using the OA as the building brick. Each OA is assigned to an area in a higher geography by first selecting one of the postcodes in the OA as a ‘master’ postcode. The OA inherits all of the characteristics of the master postcode including its assignments to higher areas and its grid reference.


The master postcode was selected using an algorithm which calculates the postcode centroid within an OA which has grid references closest to the population-weighted centre of the OA. This is different from the methodology employed in 2001 where the weighting was based on household count alone. In some instances, it was necessary to assign master postcodes manually or deviate from the standard algorithm, for example, if two postcode centroids were equidistant from the population-weighted centre of the OA.


Revised 2011 Output Area codes


An anomaly was discovered in the 2011 Census Output Area (OA) codes which were published on 15 August 2013. The anomaly meant that, whilst all the current 2011 Census OA codes were unique, they did not always run in sequential order by council area. We understood that this was creating additional work for some users so we decided to replace the current 2011 OA codes with new ones that run sequentially within each council area. The new codes start at S00088956 and end with S00135306.

The 2011 Census geography datasets published on 15 August 2013 were removed temporarily from the NRS website while this work was going on. No shape boundaries, population or household estimates for OAs changed as a result of this work, only the 9-character S-code they were assigned.

A lookup file linking the archived 2011 OA code to the new 2011 OA code has also been published to help users who have already started work using the archived set of OA codes. The archived set of codes range from S00042605 to S00088955.

Metadata

File identifier
9d977a73-7884-4870-ae76-afccf8e6fae8   XML
Metadata language
eng English
Hierarchy level
dataset Dataset
Date stamp
2018-02-23
Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0

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