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Garmin GB Discoverer Premium 1:25K Maps of All of Great Britain microSD/SD card

Product Code: GGBNPM21

The best just got better. Previously it was only possible to buy Ordnance Survey (OS) maps at a scale of 1:25k for a specific National Park or National Trial e.g. The Lake District to use with a compatible Garmin device.

Now, for the first time it's a possible to buy all of Great Britain map at a scale of 1:25k on a single microSD/SD card.

IMPORTANT: This latest GB Discoverer Premium 1:25k map is not compatible with as many Garmin models as the previous 1:50k versions are. Please therefore check compatibility with your device prior to purchase.

Garmin part number: 010-12208-00

Compatibility: Compatible with Garmin Edge 800, 810, 1000, Touring, Touring Plus, GPSMAP 64, 64s, 64sc, 64st, Montana 600, 600t, 610, 610t, 650, 650t, 680, 680t, Oregon 200, 300, 400t, 450, 450t, 550, 550t, 600, 600t, 650, 650t. View the full list of compatible Garmin products here or scroll down to 'What is the map compatible with?'.

Please note: This is mapping software only - you need to already own (or purchase) one of the above Garmin devices.

Garmin GB Discoverer Premium 1:25K Maps of All of Great Britain microSD/SD card has been discontinued

The replacement map is the Garmin TOPO Great Britain PRO microSD/SD card (pictured above). This new map (released in August 2016) includes Ordance Survey 1:25K and 1:50K detailed maps, on-trail route guidance for all Great Britain National Parks from OS and more. Read more.

All of Great Britain OS Explorer

Explore and navigate all of Great Britain with the best possible scale available (1:25k) using this genuine Garmin GB Discoverer Premium map which comes supplied on SD card.

Simply insert the microSD/SD card into your compatible Garmin unit and you are ready to walk, hike, ride or hack all of Great Britain with an OS map at a scale of 1:25k.

All of Great Britain GB Discoverer Premium map covers the entire British Isles (including the Isle of Man) as shown in the UK map to the right.

What the 1:25k all of Great Britain map provides

When inserted into a compatible Garmin device the GB Discoverer Premium all of Great Britain maps provide Ordnance Survey (OS) maps at a scale of 1:25 000 for the entire British Isles, including the Isle of Man. The map data is the same as the scale found in the OS Explorer map series (same as the OS orange cover paper maps). Rather than having folding paper maps to deal with, OS map are all on your Garmin's screen and in the palm of your hand. Click here to read more about Garmin GB Discoverer map series.

Pictured left: The Garmin Montana 680 with on-screen OS Landranger 1:25 000.

Please note: Display may differ from unit to unit. Garmin GPS device sold separately.

Key Features

‣Full topographic coverage for Great Britain with Ordnance Survey 1:25,000, 1:50,000 and 1:250,000 maps on just one (1) microSD/SD card
‣Isle of Man topographic coverage provided by the Department of Infrastructure, Isle of Man
here streetmaps for the whole of Great Britain
‣Includes terrain contours, topo elevations, summits, paths and routable roads
‣Designed for walking, trekking, cycling and includes turn-by-turn directions with preloaded Great Britain road maps
‣Full topographic Ordnance Survey mapping
‣Points of interest including campsites, hotels, B&Bs, restaurants, cafe, leisure attractions and geographical reference points
‣Includes Digital Elevation Model (DEM) for route profile planning
‣Genuine Garmin map

GB Discoverer Premium 1:25k OS screen shots

GB Discoverer OS Landranger screen shots

What is the map compatible with?

The all of Great Britain 1:25k map on SD card is compatible with the latest Garmin handheld and cycling models, and must include an SD or microSD card slot. The models the 1:25k scale GB Discoverer Premium map is compatible with are as follows:

Garmin Edge 800, Edge 810, Edge 1000, Edge Touring, Edge Touring Plus, GPSMAP 64, GPSMAP 64s, GPSMAP 64st, Montana 600, Montana 650, Montana 650t, Oregon 200, Oregon 300, Oregon 400t, Oregon 450, Oregon 450t, Oregon 550, Oregon 550t, Oregon 600, Oregon 600t, Oregon 650, Oregon 650t.

IMPORTANT: The GB Discoverer Premium 1:25k Great Britain map is NOT compatible with the following Garmin models:

Garmin Astro, Colorado 300, Colorado 400c, Colorado 400i, Colorado 400t, Dakota 20, eTrex 20, eTrex 30, GPSMAP 62s, GPSMAP 62sc, GPSMAP 62st, GPSMAP 62stc, GPSMAP 78, GPSMAP 78s, GPSMAP 78sc, Monterra, nuvi 500, nuvi 510, nuvi 550, Rino 650, Rino 655t.

Please note: The models above are however fully compatible with the 1:50k scale version of the GB Discover Great Britain map. If you own one of these Garmin devices, view the compatible map here.

How to install

Mapping for Great Britain comes supplied on a microSD inside a larger SD card adaptor. To install insert either the full size or microSD card (depending on your model) into a compatible Garmin GPS device (see compatibility list above).

Please note: When using the purchased map, the SD card needs to remain in your Garmin device at all times so the map can be read. The map card cannot be copied to either your Garmin unit or external hard drive. However the map SD card can be used in multiple compatible Garmin devices, but only one at a time. For further help with installing and loading Garmin SD/microSD Cards click here.

Garmin GB Discoverer Premium 1:25K Questions and Answers


Do you have a question about the Garmin GB Discoverer Premium 1:25K? Submit your question via our contact page.

Other maps to consider

As well as an 1:25k OS map for the entire country, it's also possible to buy cheaper 1:50k scale maps for all of Great Britain (excluding the Isle of Man) and regions of the England, Scotland and Wales. These include: Southern England and Wales, Northern England and the Midlands and Scotland.

Exploring, walking or hiking elsewhere in the UK?

A number of 1:25K OS Explorer maps covering Great Britain's National Parks may also be available to buy, these are pictured below.

In addtion to the National Parks, there are also other maps at a scale of 1:25k which cover Great Britain's National Trails, as pictured below.

In total there were 42 maps in the complete GB Discoverer series (although some are now no longer available). To view them all click here.

Garmin GB Discoverer original 2009 publicity material:

Click on the above image to view high resolution version and read about the Discoverer maps along with the original list of National Parks and National Trails.

Why buy from us?

We are official Internet Retailers of Garmin products and we sell the genuine Garmin maps. We always aim to ensure the mapping available at our website is the most recent edition of the software. Beware of other websites selling older mapping that is not the current version of the software.

This page was last updated on: 13th June 2017


We offer UK, Europe and Worldwide deliveries. We despatch orders at 5.30pm on Monday, Tuesday, Wednesday, Thursday and Friday. We need to receive your order on those days by 4.30pm. When possible we may despatch orders received after that time. No orders are despatched after 5.30pm and no orders are despatched on Saturday or Sunday.

We offer economy and premium delivery. Click here for further info. All options also appear at the basket pages.

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