Delta-X: Digital Elevation Model, MRD, LA, USA, 2021

This dataset provides an updated digital elevation model (DEM) for the Atchafalaya and Terrebonne basins in coastal Louisiana, USA. The DEM is updated from the Pre-Delta-X DEM and extended to the full Delta-X study area. This DEM was developed from multiple data sources, including sonar data collected during Pre-Delta-X and Delta-X campaigns, bathymetric data from the Coastal Protection and Restoration Authority System-Wide Assessment and Monitoring System (CPRA SWAMP), and NOAA, and topography from the National Elevation Dataset and LiDAR from US Geological Survey (USGS). The provided data layers include the DEM, a binary water/land mask, data source flags, and eight layers with analysis weighting factors for each pixel. Elevation values are provided in meters with respect to the North American Vertical Datum of 1988 (NAVD88). The weighting factors indicate how each data source contributed to this multisource DEM. The data are provided in cloud-optimized GeoTIFF (CoG) format.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated November 5, 2026, 08:04 (UTC)
Created April 1, 2025, 15:22 (UTC)
Identifier 10.3334/ORNLDAAC/2181
Modified 2026-11-02T22:15:59Z
Theme {"Earth Science"}
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id cd93bef7-3d70-4339-b8a2-bc423e7d7ebf
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
license https://www.usa.gov/government-works
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 31b2aba4832f0c1ffe01079afddbe272e0c13d185afba7c4ba49799a0fd18014
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -91.908, "NorthBoundingCoordinate": 29.9581, "EastBoundingCoordinate": -90.149, "SouthBoundingCoordinate": 28.968}]]
temporal 2012-01-01/2021-12-31