Landform
Polygon feature representing an area of the Earth's surface with a distinct physical morphology, such as cliffs, artificial slopes, and burial mounds.
Temporal filtering
The earliest date on which you can request a one-off snapshot of a date in the past for data in this feature type is 29 September 2022.
Feature type attributes
The following sub-sections provide details about the attributes included with this feature type, their data types in the different output formats, and other important metadata about them.
osid
Primary identifier for the feature. The OSID is a Globally Unique Identifier (GUID) and requires no centralised authority to ensure uniqueness. Note that the same OSID can occur in more than one feature type when a single feature is represented multiple times in the OS NGD.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Max Length: 36
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
toid
Topographic identifier (TOID) of the feature, as published in the OS MasterMap suite of products.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 20
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: No
Data Schema Version: 1.0
versiondate
Date when the version was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
versionavailablefromdate
The date this version of the feature became the latest version.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
versionavailabletodate
The date this version of the feature was superseded by an update or ceased to exist.
Data Types: String (GeoJSON), DateTime (GPKG), DateTime (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
firstdigitalcapturedate
Represents the date on which a feature was first digitised by Ordnance Survey.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
changetype
The type of change that generated a new version of the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: changetypevalue
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
geometry
Geometry for the feature.
Data Types: Geometry (GeoJSON), Geometry (GPKG), WKT (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
Geometry Type: Polygon
geometry_area
The measured area of the geometry in square metres.
Data Types: Number (GeoJSON), Float (GPKG), Real (CSV)
Nullable: false
Precision: 15
Scale: 6
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
geometry_evidencedate
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
geometry_updatedate
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
geometry_source
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
theme
The OS NGD theme to which this feature belongs.
Data Types: Array (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: themevalue
Max Length: 40
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
description
A single descriptive value intended for a quick understanding of what the feature represents.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: landformdescriptionvalue
Max Length: 100
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
description_evidencedate
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
description_updatedate
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: false
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
description_source
The source organisation who provided the data.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name1_text
Name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
name1_language
The language of name1, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name1_evidencedate
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name1_updatedate
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name1_source
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name2_text
The alternative language name assigned to identify the feature.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 254
OS NGD API – Features Filterable: Yes
OS Select+Build Filterable: Yes
Data Schema Version: 1.0
name2_language
The language of name2, provided as a 3-digit ISO 639-2 code ('eng, 'cym', 'gla').
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Code List Name: languagevalue
Max Length: 3
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name2_evidencedate
The date on which the latest evidence was gathered to make an update if required. For example the date of collection by a surveyor or third party information received.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name2_updatedate
Date when the attribute was last updated.
Data Types: String (GeoJSON), Date (GPKG), Date (CSV)
Nullable: true
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
name2_source
The organisation that provided the information.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: true
Max Length: 50
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
capturespecification
Indicates the capture specification used by OS when capturing the feature. This could either be Urban, Rural or Moorland.
Data Types: String (GeoJSON), String (GPKG), String (CSV)
Nullable: false
Code List Name: capturespecificationvalue
Max Length: 10
OS NGD API – Features Filterable: No
OS Select+Build Filterable: No
Data Schema Version: 1.0
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