Boundary: Digital Terrain Model from 2021 Bathymetric LiDAR Survey of Dundrum Bay

A Digital Terrain Model (DTM) derived from a 2021 pilot bathymetric LiDAR survey commissioned for Dundrum Bay and Carlingford Lough. The survey used a Rapid Airborne Multi-beam Mapping System (RAMMS) capable of approximately 25,000 range observations per second and penetration to three times visual water clarity. The dataset is provided by the Government Digital Service under the OGL-UK-3.0 license.

Use Cases

• Model coastal erosion and sediment transport based on high-resolution nearshore bathymetry.
• Plan marine infrastructure projects based on detailed underwater terrain data.
• Calibrate and validate satellite-derived bathymetry models based on LiDAR ground truth.
• Assess habitat suitability for marine species based on seafloor topography.

Strengths

• Data was collected using a system capable of approximately 25,000 range observations per second, suggesting high spatial resolution.
• The survey aimed for data collection to depths of 10m and penetration to three times Secchi disk depth, indicating detailed underwater coverage.
• Data is available in multiple standard geospatial formats (KML, ESRI SHAPE, GEOJSON, CSV, JSON) for interoperability.

Limitations

• Row count and file size are unknown, which may limit suitability assessment for large-scale projects.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last update date is unknown; freshness unverified.

Provenance

Source

Government Digital Service

Collection Method

Airborne bathymetric LiDAR survey using a Rapid Airborne Multi-beam Mapping System (RAMMS).

Time Range

2021

Freshness

Survey was commissioned in 2021; data currency is not specified.

Geography

Nearshore areas of Dundrum Bay and Carlingford Lough.