This section describes the three features available in OS OpenMap – Local. The attributes associated with these feature types are listed below along with a brief description of their data properties.

Feature type Attribute information

Name and Definition

The name of the attribute and what it is describing.

Attribute Type

The nature of the attribute, for example, a numeric value or a code list value.

Length

Values are given here to indicate the maximum length that you will find in the data, to aid in developing applications. Length is not constrained in the GML (Geography Markup Language).

Multiplicity

Describes how many times this element is expected to be populated in the data. An attribute may be optional or mandatory, and it may have multiple occurrences. For example:

• ‘1’ – there must be a value.

• ‘2’ – there must be two values.

• ‘n’ – there may be one or more values.

• ‘0’ – population is optional.

These values may be used in combination.

Association

An association identifies the relationship between features. The relationships are by reference only and the value will be the identifier of the referenced feature.

A building constructed largely of glass for the purposes of commercial horticulture. This is a generalised glasshouse and could be made up of an amalgamation of individual glasshouses. Only glasshouses larger than 5 000m² are included.

Glasshouse attributes

featureCode

A unique feature code to facilitate styling.

• Type: integer

• Multiplicity: [1]

geometry

Polygon representing the generalised glasshouse.

• Type: GM_Surface

• Multiplicity: [1]

All railways are represented as lines and are broken where they pass under bridges, buildings or other obstructing detail. Railway sidings and the tracks of travelling structures are not included.

RailwayTrack attributes

classification

The classification of the RailwayTrack. The valid values are defined in the RailwayTrackClassification Code List.

• Type: RailwayTrackClassification

• Length: 45

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Point representing the position of the railway track.

• Type: GM_Curve

• Multiplicity: [1]

A built entity that includes a roof. This is a generalised building and could be made up of an amalgamation of other buildings and structures.

Building attributes

The following sub-sections provide details about the attributes included with this feature, their data types in the different output formats, and other important metadata about them

featureCode

A unique feature code to facilitate styling.

• Type: integer

• Multiplicity: [1]

geometry

Polygon representing the generalised building.

• Type: GM_Surface

• Multiplicity: [1]

Cables used to supply electricity that are suspended between pylons.

ElectricityTransmissionLine attributes

featureCode

A unique feature code to facilitate styling.

• Type: integer

• Multiplicity: [1]

geometry

Line representing the alignment of the electricity transmission line.

• Type: GM_Curve

• Multiplicity: [1]

Point feature representing the buildings and platforms by a railway line where a train may stop to pick-up or drop-off goods or passengers.

RailwayStation attributes

classification

The classification of the RailwayStation. The valid values are defined in the RailwayStationClassification Code List.

• Type: RailwayStationClassification

• Length: 65

• Multiplicity: [1]

distinctiveName

The name of the station, consistent with the names used by National Rail Enquiries. The suffix ‘Station’ is not added to the name.

• Type: CharacterString

• Length: 150

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Point representing the position of the railway station.

• Type: GM_Point

• Multiplicity: [1]

A road is defined as a metalled way for vehicles. A vehicle is defined as one with wheels on both sides of its body. Metalling is defined as any artificial (man-made) surface including areas of asphalt, concrete and gravel. Roads that form part of the public network and driveways to private properties that are over 100m in length are captured. Dual carriageways are represented by centrelines when the two carriageways are closer than 32.5m, roundabouts are represented by points when smaller than 450m², dead ends are removed when shorter than 36m, and roads are simplified with a 4m tolerance.

Road attributes

classification

The classification of the Road. The valid values are defined in the RoadClassification Code List

• Type: RoadClassificationType

• Length: 45

• Multiplicity: [1]

distinctiveName

The name of the road. When a road is dual named, the Welsh or Gaelic name is presented first, followed by a space, a forward slash, a space and then the English name.

• Type: CharacterString

• Length: 100

• Multiplicity: [0..1]

drawLevel

The drawLevel value of the Road, used for cartographic styling. The valid values are defined in the DrawLevelValue Code List.

• Type: DrawLevelValue

• Length: 1

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Line representing the alignment of the road.

• Type: GM_Curve

• Multiplicity: [1]

override

The override value of the Road used for cartographic styling. The valid values are defined in the OverrideValue Code List.

• Type: OverrideValue

• Length: 1

• Multiplicity: [1]

roadNumber

For Roads with RoadClassification of Motorway, Primary Road, A Road and B Road, this is the number of the road defined by the Department for Transport.

• Type: CharacterString

• Length: 10

• Multiplicity: [0..1]

Road tunnels are represented as approximate centrelines of the road that runs through the tunnel.

RoadTunnel attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Line representing the alignment of the road tunnel.

• Type: GM_Curve

• Multiplicity: [1]

Point feature representing the approximate location of numbered junction on a Motorway.

MotorwayJunction attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Point feature representing the approximate location of numbered junction on a Motorway.

• Type: GM_Point

• Multiplicity: [1]

junctionNumber

The motorway junction number assigned by the Department for Transport.

• Type: CharacterString

• Length: 10

• Multiplicity: [1]

Railway tunnels are represented as approximate centrelines of the railway that runs through the tunnel.

RailwayTunnel attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Line representing the alignment of the railway tunnel.

• Type: GM_Curve

• Multiplicity: [1]

The part of the shore or beach which lies between the Low Water Mark and High Water Mark defined by the TidalBoundary. The same condition may exist in non-contiguous offshore areas.

Foreshore attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Polygon representing the area of foreshore.

• Type: GM_Surface

• Multiplicity: [1]

An inland waterway body sufficiently wide enough to capture as an area feature. Small lakes and small islands in waterbodies are not included.

SurfaceWater_Area attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Polygon representing the area of surface water.

• Type: GM_Surface

• Multiplicity: [1]

Roundabouts smaller than 450m² are represented as point features, and the roads are extended to meet at the centre point. Mini roundabouts are not included.

Roundabout attributes

classification

The classification of the Roundabout. The valid values are defined in the RoundaboutClassification Code List.

• Type: RoundaboutClassificationType

• Length: 45

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Point representing the alignment of the roundabout.

• Type: GM_Point

• Multiplicity: [1]

An inland waterway body not sufficiently wide enough to capture as an area feature.

SurfaceWater_Line attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Line representing the alignment of the surface water.

• Type: GM_Curve

• Multiplicity: [1]

Polygons defining the extents of tidal water, up to the High Water Mark defined by the TidalBoundaries and the Normal Tidal Limit of rivers. Tidal water is not included under bridges.

TidalWater attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Line representing the alignment of the tidal water.

• Type: GM_Curve

• Multiplicity: [1]

In England and Wales, these tide lines will be the levels of mean tides, i.e. of a tide between a spring and neap tide. In Scotland, the tide lines are those of mean spring tides. In places where there is no Foreshore (e.g. vertical cliffs), the TidalBoundary is classified as the 'High Water Mark'.

TidalBoundary attributes

classification

The classification of the TidalBoundary. The valid values are defined in the TidalBoundaryClassification Code List.

• Type: TidalBoundaryClassification

• Length: 45

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Line representing the alignment of the tidal boundary.

• Type: GM_Curve

• Multiplicity: [1]

Areas of trees (coniferous, non-coniferous and mixed) are represented as polygons. Small areas of woodland are omitted and small clearings in woodland are filled.

Woodland attributes

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Polygon representing the area of woodland.

• Type: GM_surface

• Multiplicity: [1]

An electric vehicle charging station, also called EV charging station, electric recharging point, charging point, charge point and EVSE (Electric Vehicle Supply Equipment), is an element in an infrastructure that supplies electric energy for the recharging of electric vehicles, such as plug-in electric vehicles, including electric cars, neighbourhood electric vehicles and plug-in hybrids.

CarChargingPoint attributes

chargeMethod

Determines the type of current used in charging.

• Type: ChargeMethod

• Length: 15

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

The location of the car charging facility is represented as a point feature.

• Type: GM_Point

• Multiplicity: [1]

ratedVoltage

The voltage available at the car charging point. Higher voltage levels charge batteries more rapidly.

• Type: RatedVoltage

• Length: 3

• Multiplicity: [1]

type

The type of connector. This is determined by whether an EV is charged using AC or DC, the charging speed (kW power) and the safety protocol employed. Having different countries of origin, the make and model will also determine what connector are used.

• Type: CarChargingType

• Length: 27

• Multiplicity: [1]

A polygon feature that represents the area or extent of certain types of function or activity with appropriate attribution.

FunctionalSite attributes

classification

A description of the actual function of a site (that is, airfield, junior school, hospital and so on.) The valid values are defined in the SiteClassification Code List. For sites with multiple functions, the values will be provided together and separated by a ‘,’.

• Type: SiteClassification

• Length: 90

• Multiplicity: [1]

distinctiveName

The name of the site (for example, ‘Brighton College’). Note this may be null if the captured value is a house number.

• Type: CharacterString

• Length: 120

• Multiplicity: [0..1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Polygon representing the extent of the functional site.

• Type: GM_MultiSurface

• Multiplicity: [1]

siteTheme

A description of the theme that a particular site falls under (that is, air transport, education, medical care and so on.). The valid values are defined in the SiteThemeType Code List.

• Type: SiteTheme

• Length: 21

• Multiplicity: [1]

A generalised building that belongs to a FunctionalSite.

FunctionalSite attributes

BuildingTheme

A description of the theme that a particular site falls under (that is, air transport, education, medical care and so on.). The valid values are defined in the SiteThemeType Code List.

• Type: BuildingTheme

• Length: 27

• Multiplicity: [1]

classification

A description of the actual function of a site (that is, airfield, junior school, hospital and so on.) The valid values are defined in the SiteClassification code list. For sites with multiple functions, the values will be provided together and separated by a ‘,’.

• Type: SiteClassification

• Length: 90

• Multiplicity: [1]

distinctiveName

The name of the site (for example, ‘Brighton College’). Note this may be null if the captured value is a house number.

• Type: CharacterString

• Length: 120

• Multiplicity: [0..1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

geometry

Polygon representing the generalised important building.

• Type: GM_Surface

• Multiplicity: [1]

siteTheme

A description of the theme that a particular site falls under (that is, air transport, education, medical care and so on.). The valid values are defined in the SiteThemeType Code List.

• Type: SiteTheme

• Length: 21

• Multiplicity: [1]

A representative point feature giving the general location of a settlement name or geographic place name, for the purposes of text placement.

NamedPlace attributes

classification

The classification of the NamedPlace. The valid values are defined in the NamedPlaceClassification Code List.

• Type: NamedPlaceClassification

• Length: 40

• multiplicity: [1]

distinctivename

The settlement name or geographic place name. When a place is dual named, the Welsh or Gaelic name is presented first, followed by a space, a forward slash, a space and then the English name.

• Type: CharacterString

• Length: 100

• Multiplicity: [1]

featureCode

A unique feature code to facilitate styling.

• Type: Integer

• Multiplicity: [1]

fontHeight

A suggested text size to use for placing the distinctiveName as cartographic text. For most names, the text size is proportional to the size of the area to which the name applies. For valleys, the text size is based on the valley length, and for hills/mountains, the text size is based on the height of the summit. The valid values are defined in the FontHeightClassification Code List.

• Type: FontHeightClassification

• Length: 11

• Multiplicity: [1]

geometry

Point representing the cartographic position of the named place.

• Type: GM_Point

• Multiplicity: [1]

textOrientation

Suggested text orientation (in degrees) to use for cartographic text placement of valley names, names of stretches of water and estuaries.

• Type: Measure

• Multiplicity: [1]