OS topographical maps of Great Britain


Ordnance Survey (OS) the mapping agency of Great Britain and provider of detailed high quality maps. Memory-Map was the first company to licence OS map data to produce digital maps for outdoor recreation. Memory-Map's OS Landranger 1:50,000 and OS Explorer 1:25,000 maps look identical to the printed versions you may already own but are far cheaper and do not wear out! 

Available as complete Great Britain maps on disk or USB for PC with the ability to transfer or download to your iPhone, iPad or Android device. Or choose our Digital Map Shop products to select and download just the areas you need.

OS Landranger 1:50,000 scale maps for Great Britain

Choose OS 1:50,000 Landranger for low cost wide area coverage - great for easy walks, road and off-road biking, these show footpaths, bridleways and other rights of way along with thousands of points of interest such as viewing points, picnic sites and of course pubs! 

OS Explorer 1:25,000 scale maps for Great Britain 

Choose OS 1:25,000 Explorer for the best possible outdoor map - great for harder walks and off-road biking, these show footpaths, bridleways and other rights of way along with thousands of points of interest such as viewing points, picnic sites, and of course pubs! 

What is Scale?

Scale describes the relationship (or ratio) between distance on a map and the corresponding distance on the ground. If a map has a scale of 1:50 000 a distance of 1 cm on the map equates to 50 000cm (500 m) in the real world

The main scales used by Ordnance Survey (OS) for surveying are 1:1250, 1:2500 and 1:10 000. These are referred to as large scale maps, which is when features in the real world are portrayed larger on the map.

OS also produce a number of mapping products at other scales, such as 1:25 000 scale and 1:50 000 scale. These are referred to as small scale. On these small scale maps, due to scale restrictions, some features are simplified or generalised. For example, at these scales, OS does not show the shapes of individual houses as small maps would have too much detail to be able to read.

Popular OS map scales

Road maps: 1: 250,000 scale, shows roads and towns, but few individual features over a large area Landranger maps: 1 : 50,000 scale, shows roads, large paths and some individual features
Explorer Map: 1 : 25,000 scale, shows many features including paths and buildings over a small area Mastermap: 1: 1,250 scale, shows accurate position for individual buildings or small areas

Quick, easy and reliable for all your devices

Now with 5 device licences – so for example, use on your home Windows PC, a laptop when camping plus up to 3 other mobile devices iPhone, iPad or Android when walking or cycling.

Plan - Simple tools let you create and manage routes, tracks and waypoints, check distances, elevation and areas, view hill profiles, fly through 3D terrain and much more.

Print - Print unlimited maps with your own notes and route cards using multi-page and hill shading options. Try our Toughprint® waterproof paper.

Transfer - Copy maps to your mobile and send routes, tracks and waypoints to mobile or GPS.

Navigate - Install the Memory-Map app, or connect a GPS to your laptop, for a complete navigation system with moving maps and DigitalGPS™ data displays.

Review - Check tracklogs from your mobile or GPS to see where you’ve been, speed and distance covered. Share your favourites online at www.trailzilla.com

*Memory-Map Apple & Android Apps available separately via Apple App Store and Google Play.


For more helpin transferring or downloading your maps please refer to our Support knowledgebase.