99.9% uptime (See Service Levels and Maintenance as defined in our Terms & Conditions)

Output format

RESTful HTTP Request. Response in 256 x 256 PNG tile. OGC WMTS, ZXY protocols.

Full technical documentation.


EPSG:27700 (British National Grid) and EPSG:3857 (web Mercator)

Data update frequency

The underlying data for OS Maps is updated between every six weeks to six months, depending on the

data source. More information can be found here.

Geographical coverage

Great Britain