OS MasterMap Sites Layer

OS MasterMap Sites Layer shows what people see in the real world, where the common view of something (such as a school) is not the address, the main building or the playing fields, but is the site as a whole.

  • Topography
  • Download
  • Premium Plan
  • Public Sector Plan

This product is updated every six months

Representation of data provided
Representation of data provided

What OS MasterMap Sites Layer provides you with

Accurate risk analysis

OS MasterMap Sites Layer gives you an understanding of the wider geographic perspective, such as how assets interact with specific types of sites (for example, schools).

Find relevant access points

Identify where the most appropriate access points into a site are, enabling more detailed planning for emergency situations.

Enhanced analytics

OS MasterMap Sites Layer routing points enable more efficient responses and more effective deployment of resources.

Seven different themes

The OS MasterMap Sites Layer groups features into seven themes: Air transport Education Medical care Rail transport Road transport Water transport Utility or industrial Each feature is available as three feature types: functional site, access point and routing point.

Solve challenges

OS MasterMap Sites Layer can help you answer questions like ‘How close is this school to something?’ or ‘What would be affected in the event of an emergency?’.

OS MasterMap Sites Layer

Technical information


  • Download
Data theme
  • Land Use
Data structure
Vector - Polygons
Great Britain
1:1250 to 1:10,000
  • GeoPackage
  • Vector Tiles
  • GML 3.2.1
Ordering area
  • All of Great Britain or customisable area (5km2 tiles)
Publication months
  • April
  • October
OS Data Hub plan
  • Premium Plan
  • Public Sector Plan

Documents and Support

Getting started guides

  • OS MasterMaps Sites Layer - Getting started guide
    The getting started suide provides instructions for using the product in different software applications. Users with limited technical knowledge will be able to follow this guide.
    1.6 mb
    October 3, 2022
  • Getting started with GeoPackage
    This guide helps you to get started using GeoPackage - a lightweight format that can contain large amounts of complex data in a single, easy to distribute and ready to use file.
    1.11 mb
    September 30, 2021
  • Getting started with vector tiles
    This guide will help you to get started using vector tiles (MBTiles) – lightweight tiles that are efficient and quick to render in your software, letting you create customised, high-resolution, beautiful mapping.
    845 kb
    September 23, 2022

Technical specification

Supporting documents

  • OS MasterMaps Sites Layer - Overview
    The overview introduces the product and gives context for all users. It highlights key features, provides examples of potential uses for the product and lists details like file sizes, supply formats, etc.
    969 kb
    July 10, 2023
  • Product refresh dates
    Find out the update frequencies of our premium products and the calendar months that they are updated.

Release notes

OS MasterMap Sites Layer

Get this product

What you get

Key features
  • Accurate risk analysis
  • Find relevant access points
  • Enhanced analytics
  • Seven different themes
  • Solve challenges
  • Download
Data structure
Vector - Polygons
Update frequency
Every six months

How to access


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