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:
District or Unitary authorities.
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 the National Land and Property Gazetteer; DEC-NLPG Version 3.3 April 2014
Data Transfer Format 7.3 for the National Land and Property Gazetteer; DTF 7.3 Version 3.1, February 2012
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.
Data Entry Conventions and Best Practice for the National Street Gazetteer; DEC-NSG, Version 3.6, March 2014
Data Transfer Format 8.1 for the National Street Gazetteer, DTF8.1, Version 2.09 March 2015
Errata to DTF8.1 Version 2.09 July 2015
DTF8.1 Compliance Check Specification, Version 3, July 2015
DTF8.1 Health Check Specification, Version 2, June 2015
Data Transfer Format 7.1 for the National Street Gazetteer; DTF 7.1, Version 1.5, December 2008
DTF 7.1 Compliance Check Specification, Version 2.2, January 2012
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.
DCA Chairs Group election process
Data Co-operation Agreement; Service Number 401:
Key guidance and support documentation are listed above and can also be found in the Library section of this website.
Data Co-operation Agreement; Service Number 402: GeoPlace distributes regular newsletter (E-zine) by email which includes news, articles, reviews, progress, competitions and sections on GeoPlace affairs. This can be found in the eZine section of this website. You can sign up to receive the eZine from the link on the footer of the website.
Data Co-operation Agreement letter from Richard Mason, GeoPlace Managing Director