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

    Metadata Updated: February 6, 2026

    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.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date February 6, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date February 6, 2026
    Publisher ORNL_DAAC
    Maintainer
    Identifier 10.3334/ORNLDAAC/2181
    Data Last Modified 2026-02-03
    Category Earth Science
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id b9d81402-e843-49af-9f6a-7756152a6e4b
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://search.earthdata.nasa.gov/search?q=DeltaX_DEM_MRD_LA_2181&ac=true
    Old Spatial {"WestBoundingCoordinate":-91.908,"NorthBoundingCoordinate":29.9581,"EastBoundingCoordinate":-90.149,"SouthBoundingCoordinate":28.968},"CARTESIAN"
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash be8344906541e80782720baaf5314cbf311d13133a36c8236b81617b4ab10d3e
    Source Schema Version 1.1
    Spatial
    Temporal 2012-01-01/2012-01-01

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