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OS MasterMap Topography Layer support

Support documentation for OS MasterMap Topography Layer, our most detailed, current and comprehensive map dataset of Great Britain.

Getting started

OS MasterMap Topography Layer allows you to reference your data to any real-world feature, helping you to manage your organisation's assets. This page contains support documents, technical information and FAQs including documentation for Building Height Attribute and Sites Layer.

Topography layer product guide (PDF)

Discover the range of features available with OS MasterMap Topography Layer.

Building Height Attribute getting started guide (PDF)

OS MasterMap Topography Layer – Building Height Attribute is an enhancement to, and forms part of, OS MasterMap Topography Layer.

Sites Layer user guide (PDF)

OS MasterMap Sites Layer provides a nationally maintained view of the detailed extents of important locations such as airports, schools, hospitals, utility and infrastructure sites and more.

Technical information

Topography Layer technical specification (PDF)

OS MasterMap Topography Layer provides the most detailed and accurate large scale representation of Great Britain available from Ordnance Survey.

Building Height Attribute technical specification (PDF)

OS MasterMap Topography Layer-Building Height Attribute (BHA) Beta release is a dataset containing absolute and relative height values for buildings contained within OS MasterMap Topography Layer.

Sites Layer technical specification (PDF)

Sites Layer is intended to enhance analytical use of the information contained in OS MasterMap Topography Layer.

Building Height Attribute product guide (PDF)

Building Height Attribute can also be integrated with other Ordnance Survey products such as OS Terrain® 5 and OS MasterMap Imagery Layer.

OS MasterMap Topography Layer

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