This theme includes sites associated with movement of passengers and goods by air, or where aircraft take off and land.

All active air transport features (including military sites) will be captured as indicated below unless they fall out of scope (for example, a private property) or are described as disused sites.

The following features are included in the captured extent:

• Buildings for the handling of air passengers and goods.

• Buildings for the storage and maintenance of aircraft.

• Aircraft landing and taxiing surfaces (man-made or natural).

• Site access roads and paths.

• Structures associated with the operation of the site.

• Car parks for air passengers.

• Areas of man-made and natural surface totally surrounded by included areas.

• Areas of man-made and natural surface abutting included areas along a non-obstructing edge.

The following features are not included in the captured extent:

• Aircraft-related services outside of perimeter fence (for example, warehouses or catering).

• Public through-roads and pavements.

• Hotels adjacent to site and their car parks.

This theme includes sites associated with movement of passengers and goods by rail.

All rail transport sites will be captured as indicated below unless they fall out of scope; for example, a private property labelled as ‘Railway Station Bungalow’.

The following features are included in the captured extent:

• Station buildings

• Station shelters

• Platform areas

• Access roads and paths

• Station footbridges and associated structures

• Station car parks

• Areas of man-made and natural surface surrounded by included areas

• Areas of man-made and natural surface abutting included areas along a non-obstructing edge The following features are not included in the captured extent:

• Railway buildings (for example, signal boxes and maintenance huts)

• Railway track areas (made-way)

• Man-made and natural areas alongside tracks

• Public roads and footpaths

It is important to note that functional sites in the rail transport theme are often not contiguous and may be constrained of the structure of polygons in the Topography Layer.

A theme is a set of features that have been grouped together for the convenience of customers and to provide a high-level means of dividing the data in the layer logically. Features belong to only one theme.

Below are descriptions of the themes that are currently included in OS MasterMap Sites Layer and examples of functional sites that are represented within these themes. Also provided is an explanation of the features included or excluded during the capture process of an extent.

OS MasterMap Sites Layer provides seven themes:

• Air transport

• Education

• Medical care

• Rail transport

• Water transport

• Utility or industrial

This theme includes sites that focus on the provision of secondary medical care services.

All medical care sites will be captured as indicated below unless they fall out of scope; for example, a private property labelled as ‘The Blue Hospital’.

The following features are included in the captured extent:

• Main buildings.

• Site-specific service buildings and structures.

• Access roads and paths.

• Site-specific car parks.

• Areas of man-made and natural surface surrounded by included areas.

The following features are not included in the captured extent:

• Buildings not specifically related to the operation of the site (for example, children’s nursery).

• Public through-roads and their pavements; and public pedestrian through-routes.

This theme includes sites associated with the movement of passengers and goods by road.

All road transport sites will be captured as indicated below unless they fall out of scope (for example, a private property).

The following features are included in the captured extent:

• Bus/coach station buildings (for example, ticket office, waiting room)

• Bus/coach station shelters

• Car/bus/coach parking areas

• Buildings for bus/coach storage, maintenance and cleaning

• Access roads and paths

• Areas of man-made and natural surface surrounded by included areas The following features are not included in the captured extent:

• Public roads and pavements

• Pedestrian through-routes

This theme includes a very broad group of sites with a common high-level primary function of providing education (either state-funded or fee-paying).

The table above shows how the main function of a site has been mapped across to the equivalent functional site attribution, for example, a first school will be attributed as ‘primary education’.

Where a school is described with one or more functions and it is not possible to ascertain which buildings relate to which function, the entire site will be captured once for each function present. There will also be instances where there are several functions associated to a single site.

In some cases, it may be possible to determine which buildings are related to the different functional sites, but not possible to divide the playing fields; as a result, the playing fields will be captured for each function and will overlap.

The following features are included in the captured extent:

• All teaching and assembly buildings supporting education functions.

• Ancillary buildings and structures directly enabling the site to operate (for example, boiler house, kitchens and waste disposal areas).

• Site access roads and paths.

• Recreational areas associated with the site (for example, playgrounds and playing fields).

• Areas of man-made and natural surface totally surrounded by included areas.

• For schools: areas of man-made and natural surface abutting included areas along a non-obstructing edge.

The following features are not included in the captured extent:

• Public roads and pavements.

• Pedestrian through-routes.

• Separately addressed properties as indicated by house numbers.

Universities or higher education sites that have extensive and regionally disparate sites will be associated together using the stakeholder attribute, to specify a relationship between such sites that come under the control of a single stakeholder. This attribute is currently not populated but will be implemented in subsequent releases of the product.

Sites associated with professional bodies or work places will not be captured, for example, ‘Dance School’ or ‘Performing Arts School’.

This theme includes sites involved in the transfer of passengers or goods onto vessels for transport across water.

The following features are included in the captured extent:

• Port buildings (for example, customs office, ticket office, waiting room)

• Vehicle parking/waiting areas

• Structures for loading people, vehicles or goods onto vessels

• Access roads and paths

• Areas of man-made and natural surface surrounded by included areas The following features are not included in the captured extent:

• Public roads and pavements

This theme includes sites where the following activities take place:

• The principles of chemistry are applied to materials to create different materials on a large scale.

• Energy (that is, electricity, gas or oil) is produced, refined, distributed or stored.

The following features are included in the captured extent:

• Internal site access roads and paths.

• Buildings and structures associated with the operation of the site.

• Areas of man-made and natural surface totally surrounded by included areas.

• Areas of man-made and natural surface abutting included areas along a non-obstructing edge.

For marine oil terminals, include related berthing structures physically connected to the site The following features are not included in the captured extent:

• Site-related areas outside of perimeter fence (for example, car parking).

• Isolated mooring structures.