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Supporting the DCA community

We offer support services to Participating Data Co-operation Agreement (DCA) Authorities that are responsible for the creation of Address and Streets data. This covers public sector bodies:

  • Borough

  • Metropolitan Borough

  • City

  • County

  • District or Unitary authorities.

If you have any technical questions please check our FAQs or please contact us via email or phone 020 7630 4602 between 9.00 and 17.30 any working day (Monday to Friday).


GeoPlace services offered through the DCA

The following page provides an overview of the core services we offer to support the creation and maintenance of address and street data:

If you would like further details, please contact [email protected].


About the DCA

The Data Co-operation Agreement is issued by GeoPlace® LLP to all district, county and Unitary councils in England and Wales. It provides a legally binding agreement between the parties to support the creation and maintenance of GeoPlace databases (particularly related to address and street information for England and Wales and address information for Scotland through separate agreements).

The Agreement underpins a recognition by government of the substantial social and economic benefits that core reference geography brings and forms part of the framework put in place by Government to enable access by the whole of the public sector to definitive spatial information through the Public Sector Mapping Agreement (PSMA). The Agreement also recognises the role of councils in the creation and source of particular spatial information.

With an Effective Date of 1st April 2012, the DCA replaces similar arrangements between all councils and the Local Government Information House (LGIH - a subsidiary of the LGA) which were in place from 2005 (the Mapping Services Agreement (MSA)) and expired on the 31st March 2012.

About the PSMA

The PSMA is a partnership between the Department for Business, Innovation and Skills and Ordnance Survey. It is centrally funded for any public sector body that is eligible to access and use of a selection of high quality digital map products.

The PSMA spans almost all public sector organisations and will run for ten years, it started on April 1st, 2011 and has already attracted over 2,800 organisations to take advantage of being a member.

The PSMA provides access to core geographic datasets from Ordnance Survey including the AddressBase® range of products.

For more information about the PSMA, including membership, access to products and support, see:

Resources for Authority Address Custodians

Authority Address Custodians have access to a number of technical resources associated with compiling Authority Addressing Datasets. These and other documents are also available in the library.

Data Entry Conventions and Best Practice for Addresses; DEC-Addresses Version 3.4 September 2016

Data Transfer Format 7.3 Version 3.1 Fourth Edition for Addresses, September 2016

Data Co-operation Agreement; Service Number 102: LLPG full res-synchronisation to the NLPG

Use and publication of address data by DCA participating authorities

Additional resources for Authority Address Custodians can be found in the library.

Resources for Authority Street Custodians

Authority Street Custodians have access to a number of technical resources associated with compiling Authority Streets Datasets. These and other documents are also available in the library.

Entry conventions:

Data Entry Conventions and Best Practice for the National Street Gazetteer; DEC-NSG, Version 3.6, March 2014

Transfer formats:

Data Transfer Format 8.1 for the National Street Gazetteer, DTF8.1, Version 2.10 June 2016

DTF8.1 Compliance Check Specification, Version 5, June 2016

DTF8.1 Health Check Specification, Version 2.2, June 2016

Use of the NSG:

Street Works Register - Data Capture Codes

Terms and Conditions for Access to NSG Data

The use of the NSG and Ordnance Survey Data

Additional resources for Authority Street Custodians can be found in the library.

DCA governance resources 

Information on GeoPlace governance can be found in our Annual Statement. Resources on DCA governance can be seen below:

Data Co-operation Agreement (redacted)

DCA Terms of Reference: Authority Contacts Executive

DCA Terms of Reference: Regional Chairs Group(s) and Regional Authority Contacts Meeting(s).

Minutes from the Regional Chairs Groups are available to all DCA authorities on the GeoPlace Group on the Knowledge Hub.

Data Co-operation Agreement letter from Richard Mason, GeoPlace Managing Director


INSPIRE compliant view service for addresses

On behalf of local authorities and GeoPlace, Ordnance Survey has released an INSPIRE compliant view service for addresses derived from AddressBase.

The INSPIRE Address View serves points derived from AddressBase Premium that are representative of the central locations of addresses within Great Britain.  Address view points are rendered according to the portrayal rules as defined by the INSPIRE Data Specification on Addresses.

The INSPIRE Address View is free for personal, non-commercial use only.  To access the service go to where you can also:

  • Register to start a Free plan.

  • View the Data Specification Guidelines

  • See the terms of Service - Schedule 4