# ClassificationCode

This code list describes the classification code for each feature. The classification codes will be expanded as necessary for future releases.

<table><thead><tr><th width="128">Value</th><th width="454">Description</th></tr></thead><tbody><tr><td>CT18CA</td><td>Aqueduct Over Canal.</td></tr><tr><td>CT18MU</td><td>Aqueduct Over Multiple.</td></tr><tr><td>CT18NN</td><td>Aqueduct Over No Network.</td></tr><tr><td>CT18PA</td><td>Aqueduct Over Path.</td></tr><tr><td>CT18RA</td><td>Aqueduct Over Railway.</td></tr><tr><td>CT18RO</td><td>Aqueduct Over Road.</td></tr><tr><td>CT18WA</td><td>Aqueduct Over Water.</td></tr><tr><td>CT16CA</td><td>Bridge Over Canal.</td></tr><tr><td>CT16MU</td><td>Bridge Over Multiple.</td></tr><tr><td>CT16NN</td><td>Bridge Over No Network.</td></tr><tr><td>CT16PA</td><td>Bridge Over Path.</td></tr><tr><td>CT16RA</td><td>Bridge Over Railway.</td></tr><tr><td>CT16RO</td><td>Bridge Over Road.</td></tr><tr><td>CT16WA</td><td>Bridge Over Water.</td></tr><tr><td>CT19CA</td><td>Canal Aqueduct Over Canal.</td></tr><tr><td>CT19MU</td><td>Canal Aqueduct Over Multiple.</td></tr><tr><td>CT19NN</td><td>Canal Aqueduct Over No Network.</td></tr><tr><td>CT19PA</td><td>Canal Aqueduct Over Path.</td></tr><tr><td>CT19RA</td><td>Canal Aqueduct Over Railway.</td></tr><tr><td>CT19RO</td><td>Canal Aqueduct Over Road.</td></tr><tr><td>CT19WA</td><td>Canal Aqueduct Over Water.</td></tr><tr><td>CT22CT</td><td>Canal Tunnel.</td></tr><tr><td>CT22CP</td><td>Canal Tunnel Portal.</td></tr><tr><td>CT17CA</td><td>Footbridge Over Canal.</td></tr><tr><td>CT17MU</td><td>Footbridge Over Multiple.</td></tr><tr><td>CT17NN</td><td>Footbridge Over No Network.</td></tr><tr><td>CT17PA</td><td>Footbridge Over Path.</td></tr><tr><td>CT17RA</td><td>Footbridge Over Railway.</td></tr><tr><td>CT17RO</td><td>Footbridge Over Road.</td></tr><tr><td>CT17WA</td><td>Footbridge Over Water.</td></tr><tr><td>CT14MJ</td><td>Motorway Junction.</td></tr><tr><td>CT20CA</td><td>Multi-Network Bridge Over Canal.</td></tr><tr><td>CT20MU</td><td>Multi-Network Bridge Over Multiple.</td></tr><tr><td>CT20NN</td><td>Multi-Network Bridge Over No Network.</td></tr><tr><td>CT20PA</td><td>Multi-Network Bridge Over Path.</td></tr><tr><td>CT20RA</td><td>Multi-Network Bridge Over Railway.</td></tr><tr><td>CT20RO</td><td>Multi-Network Bridge Over Road.</td></tr><tr><td>CT20WA</td><td>Multi-Network Bridge Over Water.</td></tr><tr><td>LO02CR</td><td>Named Area Of Coastal Rock.</td></tr><tr><td>CT07RL</td><td>Named Area Of Railway Land.</td></tr><tr><td>LW04AS</td><td>Named Area Of Sea.</td></tr><tr><td>LW04BA</td><td>Named Bay.</td></tr><tr><td>LO02CH</td><td>Named Cirque Or Hollow.</td></tr><tr><td>LO02CS</td><td>Named Cliff Or Slope.</td></tr><tr><td>LO02HD</td><td>Named Coastal Headland.</td></tr><tr><td>LO02RA</td><td>Named Coastal Ravine.</td></tr><tr><td>LW04ES</td><td>Named Estuary.</td></tr><tr><td>LO02GI</td><td>Named Group Of Islands.</td></tr><tr><td>LW04HA</td><td>Named Harbour.</td></tr><tr><td>LO02HM</td><td>Named Hill Or Mountain.</td></tr><tr><td>LW04IM</td><td>Named Inland Water Marsh.</td></tr><tr><td>LO02IS</td><td>Named Island.</td></tr><tr><td>ZM05LS</td><td>Named Linear Structure.</td></tr><tr><td>LO02CL</td><td>Named Other Coastal Landform.</td></tr><tr><td>LO02GA</td><td>Named Other Geographic Area.</td></tr><tr><td>LO02OC</td><td>Named Other Land Cover.</td></tr><tr><td>LO02OL</td><td>Named Other Landform.</td></tr><tr><td>LO02RH</td><td>Named Range Of Hills Or Mountains.</td></tr><tr><td>LO02SH</td><td>Named Spot Height.</td></tr><tr><td>LW04IW</td><td>Named Stretch Of Inland Water.</td></tr><tr><td>LW04TW</td><td>Named Stretch Of Tidal Water.</td></tr><tr><td>LO02TC</td><td>Named Tidal Land Cover.</td></tr><tr><td>LO02NV</td><td>Named Valley.</td></tr><tr><td>LW04WF</td><td>Named Waterfall.</td></tr><tr><td>CT22PT</td><td>Pedestrian Tunnel Or Subway.</td></tr><tr><td>CT22PP</td><td>Pedestrian Tunnel Or Subway Portal.</td></tr><tr><td>CT22TT</td><td>Rail Tunnel.</td></tr><tr><td>CT22TP</td><td>Rail Tunnel Portal.</td></tr><tr><td>CT15CA</td><td>Railway Bridge Over Canal.</td></tr><tr><td>CT15MU</td><td>Railway Bridge Over Multiple.</td></tr><tr><td>CT15NN</td><td>Railway Bridge Over No Network.</td></tr><tr><td>CT15PA</td><td>Railway Bridge Over Path.</td></tr><tr><td>CT15RA</td><td>Railway Bridge Over Railway.</td></tr><tr><td>CT15RO</td><td>Railway Bridge Over Road.</td></tr><tr><td>CT15WA</td><td>Railway Bridge Over Water.</td></tr><tr><td>CT11CA</td><td>Road Bridge Over Canal.</td></tr><tr><td>CT11MU</td><td>Road Bridge Over Multiple.</td></tr><tr><td>CT11NN</td><td>Road Bridge Over No Network.</td></tr><tr><td>CT11PA</td><td>Road Bridge Over Path.</td></tr><tr><td>CT11RA</td><td>Road Bridge Over Railway.</td></tr><tr><td>CT11RO</td><td>Road Bridge Over Road.</td></tr><tr><td>CT11WA</td><td>Road Bridge Over Water.</td></tr><tr><td>CT14RJ</td><td>Road Junction.</td></tr><tr><td>CT22RT</td><td>Road Tunnel.</td></tr><tr><td>CT22RP</td><td>Road Tunnel Portal.</td></tr><tr><td>CT14RD</td><td>Roundabout.</td></tr><tr><td>🆕CT13SA</td><td>Slipway.</td></tr><tr><td>CT22MT</td><td>Tube Or Metro Tunnel.</td></tr><tr><td>CT22MP</td><td>Tube Or Metro Tunnel Portal.</td></tr><tr><td>CT21CA</td><td>Underpass Under Canal.</td></tr><tr><td>CT21MU</td><td>Underpass Under Multi-Network.</td></tr><tr><td>CT21NN</td><td>Underpass Under No Network.</td></tr><tr><td>CT21RA</td><td>Underpass Under Railway.</td></tr><tr><td>CT21RO</td><td>Underpass Under Road.</td></tr><tr><td>CT22WT</td><td>Watercourse Tunnel.</td></tr><tr><td>CT22WP</td><td>Watercourse Tunnel Portal.</td></tr><tr><td>🆕CT11WE</td><td>Weir.</td></tr></tbody></table>

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The OS Emergency Services Gazetteer Classification Scheme is available to download from the [OS ESG Downloads page](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/os-emergency-services-gazetteer/os-esg-downloads).
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