DiGMapGB-25 Mass Movement: Landslide and Subsidence Polygons for Great Britain

Version 2 data from 2008, updated with a batch of tiles in 2012, identifies 167 landscape areas as polygons attributed with geological names related to mass movement. The British Geological Survey (BGS) created this data at a 1:25,000 scale, covering selected 'classic' geology areas like Llandovery, Coniston, and the Cuillan Hills. It includes deposits that have moved downslope (landslips) as well as foundered strata where ground has collapsed due to subsidence.

Use Cases

• Mapping landslide susceptibility based on identified mass movement deposit polygons.
• Analyzing subsidence hazards using the included data on foundered strata.
• Studying the distribution of specific geological features in 'classic' areas like central Wales or the Lake District.
• Integrating geological constraints into land-use planning models using the vector polygon data.

Strengths

• Contains 167 data tiles, added to in a 2012 update.
• Data is provided in a structured vector format (ESRI shapefiles) with geometry linked to attribute records.
• Includes specific geological phenomena not commonly classified, such as foundered strata from subsidence.

Limitations

• Onshore coverage is partial, with no national coverage planned at this scale.
• The data is a snapshot from 2008, and significant changes may have occurred since release due to the dynamic nature of mass movement.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

British Geological Survey (BGS)

Time Range

Snapshot as of 2008, with a tile batch added in 2012.

Freshness

Last updated 2026-05-28 14:04:44.870053; freshness should be verified.

Geography

Selected areas of Great Britain, including Llandovery (central Wales), Coniston (Lake District), and Cuillan Hills (Isle of Skye).