Architects, surveyors, planners and most property practitioners use maps in their day-to-day professional lives.

The vast majority of these maps will be directly or partially based upon Ordnance Survey (OS) mapping data. Whether these maps are accurate, up-to-date, correctly scaled or even licensed may be unknown and it is down to the user to ensure the maps are fit for purpose and that they are adequately licensed.

It is important to understand both the strengths and failings of maps – Mapping questions suggests ways to solve some of the most common problems.

This section is maintained by Graham Allison, managing director of Streetwise.