UK-Great Britain: OS Open Maps

OS OpenData is a map service provided by Ordnance Survey. The maps cover Great Britain and a viewer is available here: http://www.ordnancesurvey.co.uk/oswebsite/opendata/viewer/

While the OS OpenData utilizes many different layers such as StreetView, MiniScale and Boundary-Line (Additional information regarding layers: http://www.ordnancesurvey.co.uk/oswebsite/opendata/discover.html) the OS OpenData maps available in WindPRO display the basic maps allowing you to change the scale as desired, unlike some of the mentioned layers.

Samples of OS OpenData are displayed in the figure below.

Samples of OS OpenData (Left: Moorfoot Hills, right: Western part of Winchester)
© Crown copyright and database rights 2013 Ordnance Survey