OS Maps API for Enterprise accesses four data sources, all of which we keep updated simultaneously. This way, we’re confident we can ensure consistency and fidelity in our products. 


•  Strategi (Overview of Great Britain with features such as railways, airports, rivers, villages, woods, land use and place names); 


•  OS VectorMap District (mid-scale map with buildings, roads, railways, rivers and forests, plus place names); 


•  OS VectorMap Local (detailed, street level map including shapes of individual houses, garden boundaries and more detailed outlines of larger buildings); 


•   OS MasterMap – Topography Layer, the most detailed, comprehensive map dataset of Great Britain. Our Topography Layer provides landscape features such as buildings, fields, fences, land, water and roads, as well as administrative boundaries – over 425 million features in all.