Environment Agency LiDAR data for the UK

Two years ago the Environment Agency started to release LiDAR data (Light Detection and Ranging) for the UK.  This is an airborne mapping technique where a laser measures the distance between the aircraft and the ground.  Most of the UK is now mapped and the data can be downloaded for free.  Height measurements are recorded as a grid with a resolution of 2m, 1m, 50cm or 25cm.

Free software such as QGIS can be used to plot the data.  This is a 25cm plot of the Merstham Rockshaw Road/M25/A23 junction in Surrey:

Merstham LiDAR

This could be rather useful for mapping lines of shakeholes or sinks.

So far about 70% of Wales has been mapped and the data is available from Natural Resources Wales.


Peter Hamilton