Delta-X Digital Elevation Model for Atchafalaya and Terrebonne Basins

2021 data provides an updated multisource digital elevation model for the Atchafalaya and Terrebonne river basins in coastal Louisiana. It integrates sonar, bathymetric, and LiDAR data from the Delta-X and Pre-Delta-X campaigns, CPRA SWAMP, NOAA, and USGS. The dataset includes elevation values, a water/land mask, source flags, and weighting factor layers in cloud-optimized GeoTIFF format.

Use Cases

• Coastal flood risk modeling using the elevation values and water/land mask layers.
• Analysis of sediment deposition patterns by comparing elevation data across the delta.
• Assessing data source reliability for specific pixels using the provided source flags and eight weighting factor layers.
• Mapping deltaic landform changes by integrating the DEM with other temporal geospatial data.

Strengths

• Integrates multiple authoritative data sources including sonar from Delta-X campaigns, CPRA SWAMP bathymetry, and USGS LiDAR.
• Provides transparency through eight analysis weighting factor layers indicating each source's contribution per pixel.
• Covers the full Delta-X study area in the Atchafalaya and Terrebonne basins, extending a previous model.

Limitations

• Conflicting last updated dates exist between platforms: datagov lists 2026-03-13 while nasa_earthdata lists 2021-12-31.
• Specific row counts, column names, and dataset size are not provided by any source.
• License is ambiguously listed as 'other-license-specified' without further details.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Developed from multiple data sources including sonar, bathymetric surveys, and LiDAR, merged into a multisource DEM.

Time Range

2021

Freshness

2026-03-13

Geography

Atchafalaya and Terrebonne basins, coastal Louisiana, USA