Data structure

The OS Open TOID data carries five attributes which are all mandatory for each release. These can be used to identify and link affiliated information for a real-world object as well as plotting its real-world position. The TOID represents a range of feature types which related to an even wider range of real-world object types, examples range from buildings (including those without an address), roads, junctions, bridges, trees, fields and more.

OS Open TOID attributes

TOID

A unique identifier assigned to geospatial data by Ordnance Survey for their MasterMap products.

• Type: Varchar

• Size: 20

• Multiplicity: [1]

VERSION_NUMBER

The date representing the version of the feature.

• Type: Integer

• Size: N/A

• Multiplicity: [0 ... 1)

VERSION_DATE

The date representing the date the feature was last updated.

• Type: Datetime (GPKG), Date (CSV)

• Size: N/A

• Multiplicity: [1]

SOURCE_PRODUCT

Attribute indicating which product a feature can be found in.

• Type: Varchar

• Size: 29

• Multiplicity: [1]

EASTING

A value in meters defining the x location according to the British National Grid.

• Type: Float

• Size: (precision, scale) - (10, 3)

• Multiplicity: [1]

NORTHING

A value in meters defining the y location according to the British National Grid.

• Type: Float

• Size: (precision, scale) - (10, 3)

• Multiplicity: [1]

GeoPackage structure

The GeoPackage data follows the same structure as demonstrated above, except for the inclusion of the following additional attribute:

id

A non-persistent integer which has been autogenerated as a function of OGC GeoPackage.

• Type: Integer

• Size: N/A

• Multiplicity: [1]

GeoPackage is also split between three different layers to allow for easier data interrogation; these layers are:

• os_mastermap_highways_network

• os_mastermap_sites_layer

• os_mastermap_topography_layer