iGeology - Interactive geological mapping of the UK.

iGeology is for anyone who wants to explore their local geology, at street-level scale, virtually anywhere in the UK.

Amateur geologists, walkers and gardeners can look at what’s in their local area, to find out about the rocks at the surface (superficial deposits) or the bedrock beneath.

Search on place names or the postcode where you live, then click on the map and reveal the rocks beneath your feet. iGeology will locate your iPhone or iPad (if GPS is enabled) and zoom to your location.

The maps use the British Geological Survey’s national scale (1:625 000) and ‘Landranger’ scale (1:50 000) geological datasets of the United Kingdom (UK).

Map coverage
1:50000 dataset covers almost the whole of England, Wales and Scotland. In Version 8 there is now only one map tile with no data on any theme: EW180_Knighton.
Only 1:625 000 scale data is available for Northern Ireland.

What's New

Version 5.0.4

-Updated our geological mapping to the latest BGS DiGMap Version 8.
-Share your geological observations and hands-on knowledge with other citizen geologists! If you have spotted an exciting geological point of interest, outcrop or even have feedback on our geological mapping now you can tell other iGeology users about it.
-Browse the latest geological photographs submitted by other users in the Photo Feed.
-Register for a BGSiD account to manage your submitted observations and to keep in touch with the latest BGS news.
-We have improved the way that new users are introduced to iGeology features, such as identifying geology and submitting a new observation.
-Bug fixes and improvements to the user interface.

Ratings and Reviews

4.7 out of 5

452 Ratings

452 Ratings

What's under my feet? Why that's easy?

Betty Swolocks

I literally stumbled across this app doing some research for a navigation exercise I'm planning to run in The Brecon Beacons.
No longer do I have to spend hours pouring over books and multiple cross references as it's all here in the app. Big point; given the provenance I have total confidence in the content. I image I will use this app now every time I go out into the mountains, hills and moorlands. The 'what's here' and associated more info is a gem. I will also be passing the information onto all of my outdoorsy colleagues.

Superb app


If you're interested in knowing the structure of the land in which you are spending some time away from home, then this is the app to get. Put together by the top experts in the UK, it gives you all the information you could want, right from the very spot where you're standing to everything you can see around you.
Get it use it, enjoy it!

So useful

Geoffrey H....

Such a useful app. I can walk around the landscape, see the geological map at the same time, checking where I am with the GPS feature, and find out what the rocks are. If I find an unusual outcrop, the map immediately shows me what I'm looking at.
This new version has improved how the GPS works, making it quicker and easier to use.


Natural Environment Research Council
106.8 MB
Requires iOS 8.0 or later. Compatible with iPhone, iPad and iPod touch.
English, Arabic, French, Portuguese
Age Rating
Rated 4+
© Natural Environment Research Council
In-App Purchases
  1. Natural Subsidence Report £6.99
  2. Radon Risk Report £3.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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