LIDAR Composite DTM 2017: 2m Resolution Digital Terrain Model for England

2017 LIDAR Composite DTM (Digital Terrain Model) is a raster elevation model covering approximately 75% of England at a 2-meter spatial resolution. Produced by the Environment Agency, it is derived from merged and re-sampled archival data, with the newest, best-resolution surveys used where available. The data has a vertical accuracy of +/-15cm RMSE and is presented in 5km grids referenced to Ordinance Survey Newlyn.

Use Cases

• Flood risk modeling and hydrological analysis based on the detailed terrain model.
• Infrastructure and construction planning based on accurate ground elevation data.
• Environmental change detection and landform analysis based on the 2m resolution raster.
• Training computer vision models for terrain classification based on the LIDAR-derived surface.

Strengths

• Covers approximately 75% of England, providing broad spatial coverage.
• High 2-meter spatial resolution for detailed terrain representation.
• Vertical accuracy of +/-15cm RMSE, indicating precise elevation measurements.
• Composite uses the newest, best-resolution data from repeat surveys.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Last update date is unknown; freshness unverified.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Environment Agency (UK), Government Digital Service.

Collection Method

Derived from airborne LIDAR surveys, with bespoke algorithms and manual editing to remove surface objects from the Digital Surface Model.

Time Range

2017 (composite version).

Freshness

Annual updates are mentioned, but the specific dataset version is from 2017.

Geography

England (~75% coverage).