Download 6.5 MB pdf: OS MasterMap Topography Layer user guide and

This chapter has discussed the themes of OS MasterMap Topography Layer and outlined the contents of
each theme. It explained how Ordnance Survey allocates a feature to one or more themes. This helps the
customer to understand which theme a feature is likely to be found in and also why some features may
appear in a theme that may not seem logical on first appearance. The next chapter discusses the types of
geometry used to represent features and the attributes that come with each feature type.
OS MasterMap Topography Layer user guide chapter 4 v1.12 – 03/2014 © Crown copyright Page 40 of 150