This code list describes the classification code for each feature. The classification codes will be expanded as necessary for future releases.
The new bridge interaction classification codes that are due to be added to this code list in December 2024 are included (and clearly labelled) in the table below.
| Value | Description |
|---|---|
The OS Emergency Services Gazetteer Classification Scheme is available to download from the OS ESG Downloads page.
The new bridge interaction classification codes (listed in the Classification Code code list above) will be added to the OS Emergency Services Gazetteer Classification Scheme In December 2024. In the meantime, these codes are available from the OS ESG Downloads page as a separate file.
CT18CA
Aqueduct Over Canal (Available from early December 2024).
CT18MU
Aqueduct Over Multiple (Available from early December 2024).
CT18NN
Aqueduct Over No Network (Available from early December 2024).
CT18PA
Aqueduct Over Path (Available from early December 2024).
CT18RA
Aqueduct Over Railway (Available from early December 2024).
CT18RO
Aqueduct Over Road (Available from early December 2024).
CT18WA
Aqueduct Over Water (Available from early December 2024).
CT16CA
Bridge Over Canal (Available from early December 2024).
CT16MU
Bridge Over Multiple (Available from early December 2024).
CT16NN
Bridge Over No Network (Available from early December 2024).
CT16PA
Bridge Over Path (Available from early December 2024).
CT16RA
Bridge Over Railway (Available from early December 2024).
CT16RO
Bridge Over Road (Available from early December 2024).
CT16WA
Bridge Over Water (Available from early December 2024).
CT19CA
Canal Aqueduct Over Canal (Available from early December 2024).
CT19MU
Canal Aqueduct Over Multiple (Available from early December 2024).
CT19NN
Canal Aqueduct Over No Network (Available from early December 2024).
CT19PA
Canal Aqueduct Over Path (Available from early December 2024).
CT19RA
Canal Aqueduct Over Railway (Available from early December 2024).
CT19RO
Canal Aqueduct Over Road (Available from early December 2024).
CT19WA
Canal Aqueduct Over Water (Available from early December 2024).
CT17CA
Footbridge Over Canal (Available from early December 2024).
CT17MU
Footbridge Over Multiple (Available from early December 2024).
CT17NN
Footbridge Over No Network (Available from early December 2024).
CT17PA
Footbridge Over Path (Available from early December 2024).
CT17RA
Footbridge Over Railway (Available from early December 2024).
CT17RO
Footbridge Over Road (Available from early December 2024).
CT17WA
Footbridge Over Water (Available from early December 2024).
CT14MJ
Motorway Junction.
CT20CA
Multi-Network Bridge Over Canal (Available from early December 2024).
CT20MU
Multi-Network Bridge Over Multiple (Available from early December 2024).
CT20NN
Multi-Network Bridge Over No Network (Available from early December 2024).
CT20PA
Multi-Network Bridge Over Path (Available from early December 2024).
CT20RA
Multi-Network Bridge Over Railway (Available from early December 2024).
CT20RO
Multi-Network Bridge Over Road (Available from early December 2024).
CT20WA
Multi-Network Bridge Over Water (Available from early December 2024).
LO02CR
Named Area Of Coastal Rock.
CT07RL
Named Area Of Railway Land.
LW04AS
Named Area Of Sea.
LW04BA
Named Bay.
LO02CH
Named Cirque Or Hollow.
LO02CS
Named Cliff Or Slope.
LO02HD
Named Coastal Headland.
LO02RA
Named Coastal Ravine.
LW04ES
Named Estuary.
LO02GI
Named Group Of Islands.
LW04HA
Named Harbour.
LO02HM
Named Hill Or Mountain.
LW04IM
Named Inland Water Marsh.
LO02IS
Named Island.
ZM05LS
Named Linear Structure.
LO02CL
Named Other Coastal Landform.
LO02GA
Named Other Geographic Area.
LO02OC
Named Other Land Cover.
LO02OL
Named Other Landform.
LO02RH
Named Range Of Hills Or Mountains.
LO02SH
Named Spot Height.
LW04IW
Named Stretch Of Inland Water.
LW04TW
Named Stretch Of Tidal Water.
LO02TC
Named Tidal Land Cover.
LO02NV
Named Valley.
LW04WF
Named Waterfall.
CT15CA
Railway Bridge Over Canal (Available from early December 2024).
CT15MU
Railway Bridge Over Multiple (Available from early December 2024).
CT15NN
Railway Bridge Over No Network (Available from early December 2024).
CT15PA
Railway Bridge Over Path (Available from early December 2024).
CT15RA
Railway Bridge Over Railway (Available from early December 2024).
CT15RO
Railway Bridge Over Road (Available from early December 2024).
CT15WA
Railway Bridge Over Water (Available from early December 2024).
CT11CA
Road Bridge Over Canal (Available from early December 2024).
CT11MU
Road Bridge Over Multiple (Available from early December 2024).
CT11NN
Road Bridge Over No Network (Available from early December 2024).
CT11PA
Road Bridge Over Path (Available from early December 2024).
CT11RA
Road Bridge Over Railway (Available from early December 2024).
CT11RO
Road Bridge Over Road (Available from early December 2024).
CT11WA
Road Bridge Over Water (Available from early December 2024).
CT14RJ
Road Junction.
CT14RD
Roundabout.
CT21CA
Underpass Under Canal (Available from early December 2024).
CT21MU
Underpass Under Multi-Network (Available from early December 2024).
CT21NN
Underpass Under No Network (Available from early December 2024).
CT21RA
Underpass Under Railway (Available from early December 2024).
CT21RO
Underpass Under Road (Available from early December 2024).