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This overview introduces OS OpenMap – Local and gives context for all users – highlighting key features, providing examples of potential uses, and listing details such as supply formats, currency, etc
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OS OpenMap – Local (OML) is the most detailed ‘street level’ open mapping product available and is designed to provide contextual mapping for your applications or web pages. It offers customers and OS Partners a clear contextual view of the world, whilst also enabling the undertaking of analytical activities.
In the example below, OS OML has been used as backdrop mapping to contextualise and provide a clear visual representation of a heat map for estimated house prices in an area:
OS OML data is available as either pre-styled static images (raster) or interactive vectorised features in a selection of pre-defined or customisable styles.
The vectorised format of the product consists of multiple layers of feature information which can be individually interrogated, displayed and styled to suit your needs. Stylesheets are available for this product in GitHub.
The rasterised layers provide pre-defined static contextual mapping that is designed to allow customers to overlay their own data clearly. More information on styling can be found in the product's Getting Started Guide.
OS OML contains functional sites, greenspace, important buildings and Department for Transport (DfT) numbers in order to facilitate alignment with other OS products. When using OS OML for contextualised mapping, the nominal viewing scale is 1:10 000, with a recommended viewing scale range of 1:3 000 to 1:20 000.
The key features of the OS OML product are as follows:
The vector data can be used for contextual mapping purposes and as a basemap with other third-party information.
A full Great Britain set of data is available in Geography Markup Language (GML) v.3.2.1, ESRI shapefile, GeoPackage and GeoTIFF raster tiles.
Road classifications are provided alongside comprehensive coverage of road names and numbers, in alignment with other OS products.
The product contains important buildings, functional sites and greenspace.
Generalised building geometries are derived from OS MasterMap large-scale data.
Vector data map styling is highly customisable to suit your needs; premade stylesheets are also available for Ordnance Survey’s traditional styles.
The product is updated twice a year.
It is an OpenData product and is thus provided free at the point of use as a download through the OS Data Hub.
