UK Geology Map

The UK Geology Map is an interactive map that provides geological data to the user when an area is selected.  The map provides rock description, age of rock, the era and further details about any portion of rock surface in the United Kingdom.

About:  I created this map purely for fun as I wanted to play around with TileMill, which allows you to create and design your own web map.  As a geographer, I have always been interested in geology, but my actual knowledge of the subject is somewhat limited.  I figured that I might as well make a map that taught me a little bit about it in the process and hence, the UK Geology Map was created.

Technical : Like I said earlier, the map design itself is a result of the wonderful software TileMill, which allows the creation of beautiful maps.  TileMill is similar to Mapnik (which has been used to create OpenStreetMap and many others) in that it allows you to style your map with xml styling, but the maps are updated dynamically.  This is much more user friendly than the Mapnik version and makes the whole process much less of a headache.  I should say that once you have created the xml sheet in TileMill, Mapnik is then used to actually create the tiles.  Anyway, you can learn much more about it on their website, but I can’t say enough good things about TileMill.

I colored the map with a mixture of green yellow and red to give the map a feel of a classic geology map and then overlayed Digital Elevation Models (DEM) to display the physical elevation.  The wonderfully detailed Geology data comes from the British Geological Society and the elevation data is provided by CGIAR , which basically cleans up SRTM 90m Digital Elevation Data for a very large portion world.  To get the rollover effect and provide geological details of the selected location, I used the open source JavaScript library gmap-features.js which was created by Albert Sun.  I had to tweak the script just a little bit to get it to do what I wanted, but gmap-feautres.js is what ultimately allowed me to bring the map to life with clickable interaction.  And it was Chris Essig’s blog  and very useful tutorials that initially put me on to the work by Albert Sun.

As always, this is a work in progress.  I hope to make some upgrades to this map soon.

This works better in the Big Version, I promise.