OS MasterMap Topography Layer® is the most detailed and accurate view of Great Britain's landscape – from roads to fields, to buildings and trees, fences, paths and more. In Parish Online it's part of a 'stack' of base mapping layers that means whenever the map is panned or zoomed, there's always an appropriate base map available.
Ordnance Survey
Every 6 weeks
Great Britain
This layer is switched on by default in Parish Online and gives you an accurate background map to help you orient yourself on the map. It can also be used to get information on the locations of buildings, field boundaries, paths and infrastructure.
Public Sector Geospatial Agreement (PSGA).
Read more about the PSGA here: https://www.ordnancesurvey.co.uk/business-government/licensing-agreements/psga-registration
OS MasterMap has three styling options (as described in the video) to give you the look-and-feel you require for doing your work in Parish Online.