A GIS dataset from the British Geological Survey provides overall susceptibility scores (1-100) and factor scores (1-10) for property subsidence risk in England and Wales. It maps shrink-swell hazard to individual building polygons, considering geology, foundation depth, drainage, building type, and tree proximity. Postcode-level average scores are also available for aggregated analysis.
Use Cases
- Predict property-level subsidence risk using the overall susceptibility score (1-100) and individual factor scores for geology, foundation, and tree proximity.
- Analyze correlations between building type, foundation depth, and drainage factor scores to identify high-risk construction profiles.
- Aggregate building polygon scores to postcode-level averages for regional risk assessment and insurance portfolio analysis.
- Build a model to classify subsidence risk from 'non-plastic' to 'very high' based on the combined geological and structural factor scores.
Strengths
- Provides six distinct factor scores (1-10) per building for detailed risk decomposition.
- Includes an overall susceptibility score on a standardized 1-100 scale for direct comparison.
- Offers data at both individual building polygon and aggregated postcode levels.
- Enhances national geological hazard maps with property-specific structural and environmental factors.
Limitations
- Spatial coverage is limited to England and Wales, excluding Scotland and Northern Ireland.
- Risk scores are derived from modeled factors and geological maps, not direct measurements of ground movement.
- The dataset's utility for real-time risk assessment may be limited by static building and tree data.
Provenance
- Source
- British Geological Survey (BGS)
- Collection Method
- Derived from BGS GeoSure shrink-swell data, mapped to building polygons and enhanced with susceptibility factors (building type, foundation depth, drainage, tree proximity).
- Time Range
- null
- Freshness
- Last updated March 2026.
- Geography
- England and Wales