Long Island Sound Topobathymetric Lidar DEM at 1m Resolution

NOAA collected Long Island Sound topobathymetric lidar data in four blocks between March and October 2023 using NV5's Leica Chiroptera/Hawkeye systems. The final classified data were transformed to orthometric height and used to create Digital Elevation Models in Cloud Optimized GeoTIFF format. The DEMs have a 1-meter pixel resolution.

Use Cases

• Modeling coastal inundation and storm surge based on the 1-meter resolution topobathymetric elevation data.
• Analyzing shoreline change and sediment transport based on the integrated land and underwater elevation model.
• Creating nautical charts and navigation aids based on the detailed bathymetric seafloor topography.
• Assessing coastal habitat suitability and change based on the high-resolution elevation and bathymetry.

Strengths

• Data collection involved 69 distinct flight missions across four blocks, suggesting thorough spatial coverage.
• DEMs are provided at a high 1-meter pixel resolution for detailed analysis.
• Data is transformed to orthometric height (Geoid18), providing a standard vertical datum for analysis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale statistical modeling.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Collected via airborne lidar using Leica Chiroptera/Hawkeye systems by NV5.

Time Range

Data collected between March and October 2023.

Freshness

Last updated 2026-03-13 21:13:58.791607; freshness should be verified.

Geography

Long Island Sound, covering areas of New York and Connecticut.