NISRA Open Data Boundaries - Census Output Areas - Datasets - Open Data NI
Publish date: blocks as the Census – Output Areas (OAs). to 1, in , and therefore the OA boundary containing the. NISRA Open Data Boundaries - Census Output Areas The NISRA boundaries is a polygon dataset consisting of Output Areas set for the thebluetones.info data has been extracted from Creation Date, February 8, , 17 (UTC). The Census Output Areas are designed specifically for statistical purposes. Where no operative date is shown for an authority, boundaries used in the.
Readers should consult the ONS product guide for a fuller description.
Census geography - Office for National Statistics
For example, the geography of the Census for England consisted of a 4-level hierarchy: The digitised co-ordinates points, lines, areas which make up these census geographies are available as digitised boundary datasets.
These form the areal representation 'buckets' against which various census statistics e.
What can digitised boundary datasets tell us? Census area statistics contain a pointer generally a code such as 'E' which represents the code for the London Borough of Lambethto the geographical census areas to which they relate.
By linking census area statistics with the corresponding digitised boundary datasets for a specific census year, the census attributes can be visualised as a map. Mapping census datasets in this way allows for an exploration of the characteristics of census datasets geographically and may provide additional demographic, socio-economic and cultural insights into the census data.
Splits were applied where: Where splits occur, building blocks of postcodes were used to create two or more new OAs constrained to the boundary of the original OAs from which they were created.
The use of building blocks postcodes is consistent with the methodology applied inand enabled production of postcode to OA lookups.
Where OAs or SOAs breached a specified lower population threshold their population became too small and is therefore potentially disclosivethey were merged with an adjacent OA or SOA.
Merges were applied where: Statistical wards, CAS wards and ST wards Statistical Wards Ina National Statistics policy was introduced to minimise the statistical impact of frequent electoral ward boundary changes, particularly in England. Under this policy any changes to English or Welsh electoral ward boundaries promulgated laid down in statute by the end of a calendar year, were implemented for statistical purposes on 1 April of the following year, irrespective of the year the actual change came into operation.
The wards resulting from this policy were known as 'statistical wards'. So, for example, statistical wards were those that were promulgated by 31 December In general they reflected actual electoral wards as at Maybut for 28 local authority districts LAD they also included boundary changes that were not operational until June Therefore, for any given year statistical wards in some LADs were different to the statutory electoral wards because of the varying time lags between the promulgation and operation dates of boundary changes.
Output areas - Office for National Statistics
Please see the 'Further Information' section below for a list of those LADs subject to boundary change in Mayas promulgated by December The 1 April implementation date is retained, but it now relates to those administrative and electoral areas that are statutorily operative on 31 December of the previous calendar year that is, statutory electoral wards.
As such, statistical wards no longer exist — the last set produced was statistical wards. In England and Wales they were identical to the statistical wards, except that 25 of the smallest sub-threshold wards were merged into 7 receiving wards to avoid the confidentiality risks of releasing data for very small areas.
This happened to those wards with fewer than residents or 40 households as at the Census. There were a total of 8, CAS wards in England and Wales, 18 fewer than the total number of statistical wards. Please see the 'Further Information' section below for details of those statistical wards that were merged to create the CAS wards.
Harvested Gemini Metadata
There were 1, Scottish CAS wards, with a minimum size of 50 residents and 20 households. See the 'Further Information' section below for this lookup file. Please see the 'Further Information' section below for this lookup file. Super Output Areas Larger standard building bricks - known as Super Output Areas - for use in official statistics have been produced outside the Census programme by grouping Output Areas by automated zoning methods.
The release of the Output Area boundaries was later than planned, although in time for preparations before release of the local statistics. The main change in the timing of the production of Output Areas was to allow compliance with a new National Statistics policy to harmonize output to boundaries as they exist at the end of each calendar year.
This also met the very widesperead customer demand for output for up to date areas. The availability of the Output Area boundaries was also delayed by an additional month to allow a limited number of changes and corrections after quality assurance. Perhaps the most significant is that the 'extent of the realm', which includes areas of sea and which was used in the production of Output Areas, has been retained as the containing outer boundary of the Output Areas in preference to mean high water mark.