River Basin LIDAR: 1m DTM and DSM Elevation Models

Airborne LIDAR surveys provide high-resolution elevation data for river basins in Northern Ireland. The dataset includes both Digital Terrain Models (DTM) and Digital Surface Models (DSM), typically delivered as 1km x 1km tiles with a 1m x 1m grid resolution. Data from 2009 and 2010 also contains the underlying point cloud files with a 0.2m point spacing.

Use Cases

• Flood risk modeling based on high-resolution terrain elevation.
• Hydrological analysis of river basin morphology using the DTM.
• 3D visualization and mapping of land surfaces by combining elevation grids with orthophotographs.
• Infrastructure planning and environmental impact assessments using detailed surface models.

Strengths

• High spatial resolution with a 1m x 1m grid for elevation models.
• Includes underlying point cloud data (0.2m spacing) for 2009-2010 acquisitions, allowing for custom processing.
• Data is structured in a standardized tiled format (1km x 1km) for manageable area-based downloads.

Limitations

• Specific row counts, file sizes, and complete column/attribute details are not provided in the metadata.
• The dataset is described as 'not a supported LPS product', which may imply limited official technical support.
• The Ballymena area datasets are split due to size constraints, which could complicate data assembly for that region.

Provenance

Source

OpenDataNI (OpenData Northern Ireland)

Collection Method

Derived from airborne LIDAR survey systems.

Time Range

2009-2012

Freshness

Last updated metadata dates range from 2026-07-08 13:31:33 to 2026-07-08 13:33:20, though the underlying data collection years are 2009, 2010, and 2012.

Geography

River basins in Northern Ireland, specifically mentioning Ballymena.