Alternative Title
Acorn, ACORN
Dataset Language
Acorn Geodemographic data supplied under licence from CACI ltd. Acorn is a geodemographic classification that segments the population according to their lifestyle, life stage and affluence. It can be useful for better understanding our residents, knowing how best to communicate with them and for informing service planning.

The dataset includes a point for every household in Hertfordshire coded by Acorn category and type. This data is strictly for use only by internal employees and any sharing or restriction queries should be directed to

Topic Category
Keyword Value: People
Originating Controlled Vocabulary: Integrated Public Sector Vocabulary (IPSV)
Originating Controlled Vocabulary Citation: Version 2.00 - 2012-08-05

Keyword Value: Population distribution and demography
Originating Controlled Vocabulary: GEMET - INSPIRE Spatial Data Themes (GEMET)
Originating Controlled Vocabulary Citation: 2008-06-01
Temporal Extent
from 2019-04-01 to 2020-04-01
Dataset Reference Date
Date: 2020-05-12
Date Type: Revision Annually
Data collected and processed by CACI from a number of sources including open government registers, private sector databases and lifestyle surveys.
Hertfordshire County
Vertical Extent
Spatial Reference System
OSGB36 - National Grid of Great Britain
Spatial Resolution
Resource Locator
Internal Viewer: Acorn Viewer
Layerfile for user by HCC internal staff:J:\Geodata\Other\Acorn
ESRI/Layer File
Responsible Organisation
Hertfordshire County Council - Community Intelligence and Data Science Team
Role: Custodian, Distributor, Point of Contact, Publisher, Contract Management.
Limitations on Public Access
There are licence restrictions with what can and cannot be shared outside of HCC. Please do not make copies of the maps or share data where individual Acorn Categories/Types can be identified for a property which are intended to be shared externally.

If you would like to share any Acorn maps or data, please contact Kellie Blanchard to discuss your requirements. For further information about geodemographics in Hertfordshire, please see the collaboration page on the intranet or contact

Use Constraints
Licensed under the Public Sector Geospatial Agreement.
You must use the appropriate Copyright Acknowledgement;

Please Source: Acorn, CACI Ltd,2021
Additional information
For further information and to be given access to the Acorn collaboration page to access supporting documentation/resources please email
Resource Identifier
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services.
Re-designing HCC Data for INSPIRE not done
Equivalent scale
Bounding box
-0.71, 0.19, 51.62, 52.06
Quality scope
Spatial representation type
Character encoding
Data quality
Maintenance information
Maintenance and update frequency: annual refresh in April / May
Metadata update date
Metadata Language
Metadata Point of Contact
Hertfordshire County Council - Community Intelligence and Data Science Team
Email :
Resource Type
6 Dataset
File Identifier
Hierarchy level name
Parent identifier
Metadata standard name
Metadata standard version
Review date
Name Long Name Description
UDPRN Unique Delivery Point Reference Number A unique code used by the Royal Mail to identify a delivery point (i.e. premise)
UPRN Unique Property Reference Number The Unique Property Reference Number of the building, used by the Royal Rail to identify individual premises and monitor their changes over time
Household_Acorn_Category Household Acorn Category A number denoting which Acorn category the building belongs to (from 1 - 6). Buildings with no Acorn Category are given null values
Local_Custodian_Code Local Custodian Code Code denoting which Local Authority (i.e. District) the building falls within
Local_Custodian_Name Local Custodian Name The name of the Local Authority (i.e. District) the building falls within
Easting Easting Easting of the building (the six figure OS co-ordinate)
Northing Northing Northing of the building (The six figure OS co-ordinate)
Postcode Postcode The postcode of the building
Output_Area Output Area The Output Area where the building falls within
FullAddr Full Address The full address of the building, obtained using OS AddressBase
District District The District where the building falls within
LSOA11CD LSOA Code The code for the LSOA the building falls within
LSOA11NM LSOA Name The name for the LSOA the building falls within
Electoral_Division Electoral Division The Electoral Division the building falls within
WD21CD Ward Code (2021) The code for the Ward the building falls within (correct at March 2021)
WD21NM Ward Name (2021) The name for the ward the building falls within (correct at March 2021)
CACI_HH_ACORN_Cat_Name_URL CACI Household Acorn Category URL A URL linking off to a summary description of each Acorn Category stored within Portal for ArcGIS (used in the Acorn Viewer popups)
CACI_HH_ACORN_Cat_Name CACI Household Category The Acorn Category the building belongs to. There are 6 Categories in total.
CACI_HH_Acorn_Type_Name CACI Household Acorn Type The Acorn Type the building belongs to, with Types being subtypes of the wider Acorn Categories. There are a total of 60 Acorn Types
CACI_HH_ACORN_Type_Name_URL CACI Household Acorn Type URL A URL linking off to a summary description of each Acorn Type stored within Portal for ArcGIS (used in the Acorn Viewer popups)
OSGB36 National Grid Bounding Coordinates
West: 486000 East: 552000 North: 245000 South: 189000
More Information
Change History