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Delta-X: Ecogeomorphic Cell Products across the MRD, LA, USA, 2021

Metadata Updated: December 7, 2023

This product delineates the Mississippi River Delta (MRD) landscape into distinct ecogeomorphic cells, which are small contiguous areas of land with similar ecological and geomorphological characteristics. The study area is the Atchafalaya and Terrebonne basins of the MRD in southern Louisiana, U.S., which was the focus of NASA's 2021 Delta-X campaign. Each ecogeomorphic cell is a small homogeneous area of similar vegetation and elevation (or bathymetry). A "cell" typically consists of a cluster of contiguous pixels in a raster image, although cells of single pixels are present. The elevation was derived from the USGS Digital Elevation Model, and the vegetation was characterized by its spectral signature as measured by near infrared (NIR) reflectance and normalized difference vegetation index (NDVI). NIR and NDVI were computed from Sentinel-2 images acquired January through September 2021. The data are provided in shapefile and GeoTIFF formats. The vector shapefiles contain the distinct ecogeomorphic cells as polygons with unique labels (i.e., ID number). A raster image of these ecogeomorphic cells provided wherein the pixel values are the polygon labels from the shapefiles. The GeoTIFFs hold the mean and standard deviations of bathymetry, NIR, and NDVI spectral indices within each ecogeomorphic region (polygon). The raster data are provided with a spatial resolution of 0.000045 degrees (approximately 5 meters).

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 May 30, 2023
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview

RGB composite image of the Atchafalaya and Terrebonne basins (R=Bathymetry, G=NIR of 1st quarter, B=NIR of 3rd quarter) highlighting the various ecological and geomorphological features of the landscape.

Additional Metadata

Resource Type Dataset
Metadata Created Date May 30, 2023
Metadata Updated Date December 7, 2023
Publisher ORNL_DAAC
Maintainer
Identifier C2550501926-ORNL_CLOUD
Data First Published 2022-11-17
Language en-US
Data Last Modified 2023-06-12
Category Delta-X, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Simard, M., M.W. Denbina, E. Rodriguez, A.L. Christensen, K.A. Wright, and A. Rovai. 2022. Delta-X: Ecogeomorphic Cell Products across the MRD, LA, USA, 2021. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2108
Graphic Preview Description RGB composite image of the Atchafalaya and Terrebonne basins (R=Bathymetry, G=NIR of 1st quarter, B=NIR of 3rd quarter) highlighting the various ecological and geomorphological features of the landscape.
Graphic Preview File https://daac.ornl.gov/DELTAX/guides/DeltaX_Ecogeomorphic_Products_Fig1.jpg
Harvest Object Id f4ea35ab-d6fa-4247-a249-2e38ae5e46c7
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.3334/ORNLDAAC/2108
Metadata Type geospatial
Old Spatial -91.55 29.02 -90.21 29.74
Program Code 026:001
Source Datajson Identifier True
Source Hash 669888e1b67a0900a70cc2f9ece69839ef5a421984f82ebddc77b8b260136970
Source Schema Version 1.1
Spatial
Temporal 2021-01-01T00:00:00Z/2021-09-30T23:59:59Z

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