3.3.1
DCA organisations are responsible for delivering DCA Street Updates and ASD Updates to GeoPlace from their LSGs and ASD.
3.3.2
Unitary Councils including London Boroughs and Metropolitan Boroughs in England and Wales are responsible for the maintenance of LSGs and Street Naming and Numbering (SNN).
3.3.3
In English Counties, the source of SNN is District Councils.
3.3.4
For a comprehensive list of all LHAs in England and Wales, all SNN Authorities and the USRN range prefixes, see Appendix B.
3.3.5
All SNN Authorities must have an Authority Address Custodian and should have an SNN Officer. These officers are the point of contact for these matters.
3.3.6
The following groups are known as NSG Users, see Table 1:
Group 1
The Authority Street Custodian and the DCA roles listed in this section, also known as Local Highway Authorities (LHAs).
- LHAs are responsible for creating and maintaining the NSG by producing and maintaining Local Street Gazetteers (LSGs) including Additional Street Data (ASD) and sending DCA Street Updates to GeoPlace.
- The types of LHAs which are responsible for the maintenance of LSGs and Street Naming and Numbering (SNN) are:
- Unitary Authorities in England and Wales.
- London Boroughs.
- Metropolitan Boroughs.
- Within English Counties, the source of SNN is District or Borough Councils.
- The types of LHAs which are responsible for the maintenance of LSGs and Street Naming and Numbering (SNN) are:
Group 2
National/Regional Highway Authorities.
- National/Regional Highway Authorities are the organisations which are responsible for maintaining ASD Records against the NSG Records (except for Highways England) maintained by an LHA.
- In addition to LHAs, National/Regional Highway Authorities are currently responsible for creating and maintaining ASD Records and in certain instances Street data and submitting them as ASD Updates to GeoPlace. These organisations are:
- Transport for London (TfL).
- Network Rail.
- Highways England (separate TRSG only).
- Welsh Assembly Government.
Group 3
Organisations with an asset in the Street, for example a Statutory Undertaker with cables or pipelines in the Highway.
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Table 1 - NSG Record responsibility
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3.3.7 Group 1:
Unitary authority
English County
London Borough
Metropolitan Borough
3.3.8 Group 2:
Highways England (TRSG)
Welsh Assembly Government
Transport for London
Transport Authority
3.3.9 Group 3:
Another asset owner
3.3.10
An NSG User is a statutory undertaker of street works duties as defined under the New Roads and Street Works Act 1991 (NRSWA) and by the Department for Transport (DfT). NSG Users include all DCA organisations that are often referred to as Works Promoters. For a list of all these organisations, see: https://services.geoplace.co.uk/street/swa-codes. This list is maintained by the NSG Custodian.
3.3.11
The SNN Officer for each SNN Authority Administrative area is responsible for the allocation and approval of Street Names as described in Section 4.
3.3.12
The Authority Address Custodian is responsible for ensuring that all Street Data is recorded accurately in their LLPG and must work closely with the Authority Street Custodian to ensure that all the Street Data present in GeoPlace is synchronised.
3.3.13
The Authority Street Custodian is responsible for ensuring that all Street Data is recorded accurately in their LSG and must work closely with the Authority Address Custodian to ensure that all the Street Data present in GeoPlace is synchronised. The Authority Street Custodian is responsible for the attributes of the Street data as shown in Table 3.
3.3.14
The SNN Officer, Authority Address Custodian and Authority Street Custodian must be conversant with the data entry conventions and guidance described in the current version of the DEC-Addresses and the DEC-Streets.
3.3.15
This section provides the Authority Street Custodian with the basic concepts and scope for creating and maintaining an LSG.
3.3.16
The LSG is a localised subset or constituent part of the NSG. The LSG is a geographic register (gazetteer) of all Streets within an LHA area. Each LSG must record a register of all Streets within the relevant geographic area regardless of maintenance or responsibility.
3.3.17
The definition and content of the LSG also includes Public Rights of Way (PRoWs). A PRoW is not always a real-world Object, sometimes it is a line on a map indicating a specific type of right to pass over land. For example, a PRoW might be across a grass field with nothing visible on the ground to mark it.
3.3.18
A PRoW is more abstract than a real-world Street but nevertheless must be included in the LSG. For further information about PRoWs, see Section 8.
3.3.19
PRoWs and footpaths must be recorded into an LSG as Streets.
3.3.20
A level 3 LSG (see Section 5) is built around the concept of an Elementary Street Unit (ESU). An ESU is part of the wider geographic area defined as a Street. For further information, see Section 11.