November 2019

100km²

GML, DWG, File Geodatabase, GeoPackage

November 2019

Detailed View, Plan View, Building View

OS Digimap Licence

© Crown copyright and database rights 2020 Ordnance Survey (100025252)

1:1250 Urban, 1:2500 Rural, 1:10,000 Moorland

MasterMap Topography Layer is not supplied in tiles, it is a continuous dataset that covers the whole of Great Britain. When you select an area of this dataset you will be supplied with the features that lie wholly or partially within that area as follows:

• File Geodatabase format: data supplied as a single file
• DWG format: data supplied as a single file
• GML format:
• Areas below 25km2 i.e. 5km x 5km are supplied as a single file.
• Areas larger than 25km2 are supplied in 4km2, i.e. 2km x 2km chunks. For example if you select 100km2 you will receive 25 chunks. Note the chunks are created from the lower left hand corner of the ordered area, so they do not align with the National Grid.

• Thematic mapping
• Land management and property development
• Environmental monitoring
• Site planning
• Tourism and promotional material
• Citizen services
• Risk assessment
• Location based services on mobile devices
• Customer service centres

• Official Product Guide: https://www.ordnancesurvey.co.uk/documents/os-mastermap-topography-layer-product-guide.pdf
• Ordnance Survey Product Information: https://www.ordnancesurvey.co.uk/business-government/products/mastermap-topography
• Ordnance Survey Support Information: https://www.ordnancesurvey.co.uk/business-government/tools-support/mastermap-topography-support

The OS MasterMap Topography Layer was developed to provide the most detailed topographic data available of the physical environment of Great Britain. OS MasterMap Topography Layer contains features that represent objects in the physical environment such as buildings, roads, paths, railways, rivers, lakes, fields, fences and letter boxes. The data also includes non-topographic features such as administrative and electoral boundaries, cartographic text and symbols. All features are represented as points, lines, areas and text, each with attributes that provide additional information relating to that feature. There are over 450 million features in the current product, and it is available for all of Great Britain.

The product is divided into nine themes that separate the features into logical groups of objects to enable more flexible data selection by users. Themes should not be thought of as independent data layers, because one feature can be a member of more than one theme. Themes allow a user who is only interested in, say, building footprints, to select just this data. The themes are:

• Administrative boundaries
• Buildings
• Heritage and antiquities
• Land
• Rail
• Roads, tracks and paths
• Structures
• Terrain and height
• Water

The product is continuously updated using a range of techniques including ground and aerial survey.

https://www.ordnancesurvey.co.uk/documents/os-mastermap-topography-layer-product-guide.pdf

* not complete - use as guide only

** Additional style files exist for GML data loaded in to Oracle and PostGIS using GO Loader from Snowflake Software: these can be found here; and for GML loaded in to PostGIS using Loader from Austun Technology: these can be found here.

*** Layer files from Esri UK are available if Productivity Suite is used to process the data. They can be found in the local installation folder of Productivity Suite e.g.:

 "C:\Program Files (x86)\ESRIUK\OSMMSymbology\ArcMap\ArcSDE\TopographyLayerFiles"