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    • ASTER Global Water Bodies Database NetCDF V001

    Metadata Updated: June 4, 2024

    The ASTER Global Water Bodies Database (ASTWBD) Version 1 data product provides global coverage of water bodies larger than 0.2 square kilometers at a spatial resolution of 1 arc second (approximately 30 meters) at the equator, along with associated elevation information.

    The ASTWBD data product was created in conjunction with the ASTER Global Digital Elevation Model (ASTER GDEM) Version 3 data product by the Sensor Information Laboratory Corporation (SILC) in Tokyo. The ASTER GDEM Version 3 data product was generated using ASTER Level 1A (https://doi.org/10.5067/ASTER/AST_L1A.003) scenes acquired between March 1, 2000, and November 30, 2013. The ASTWBD data product was then generated to correct elevation values of water body surfaces.

    To generate the ASTWBD data product, water bodies were separated from land areas and then classified into three categories: ocean, river, or lake. Oceans and lakes have a flattened, constant elevation value. The effects of sea ice were manually removed from areas classified as oceans to better delineate ocean shorelines in high latitude areas. For lake waterbodies, the elevation for each lake was calculated from the perimeter elevation data using the mosaic image that covers the entire area of the lake. Rivers presented a unique challenge given that their elevations gradually step down from upstream to downstream; therefore, visual inspection and other manual detection methods were required.

    The geographic coverage of the ASTWBD extends from 83°N to 83°S. Each tile is distributed in NetCDF format and referenced to the 1984 World Geodetic System (WGS84)/1996 Earth Gravitational Model (EGM96) geoid. Each ASTWBD_NC data product DEM file, which provides elevation information in meters. The corresponding ASTWBD_ATTNC file contains an attribute file with the water body classification information.

    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 November 12, 2020
    Metadata Updated Date June 4, 2024

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Browse image for Earthdata Search

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date June 4, 2024
    Publisher LP DAAC
    Maintainer
    Identifier C1575734501-LPDAAC_ECS
    Data First Published 2019-08-05
    Language en-US
    Data Last Modified 2019-08-05
    Category Terra, 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 NASA/METI/AIST/Japan Spacesystems and U.S./Japan ASTER Science Team. 2019-08-05. ASTWBD_NC.001. ASTER Global Water Bodies Database NetCDF V001. Sioux Falls, South Dakota, USA. Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes Distributed Active Archive Center. https://doi.org/10.5067/ASTER/ASTWBD_NC. https://doi.org/10.5067/ASTER/ASTWBD_NC.001.
    Creator NASA/METI/AIST/Japan Spacesystems and U.S./Japan ASTER Science Team
    Graphic Preview Description Browse image for Earthdata Search
    Graphic Preview File https://e4ftl01.cr.usgs.gov/WORKING/BRWS/Browse.001/2019.07.01/ASTWBDV001_N22E088_dem.1.jpg?_ga=2.58443048.344140723.1565008229-1371303444.1563801461
    Harvest Object Id f07d1784-8a76-4636-8802-722ee44f5be2
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/ASTER/ASTWBD_NC
    Metadata Type geospatial
    Old Spatial -180.0 -83.0 180.0 82.0
    Program Code 026:001
    Release Place Sioux Falls, South Dakota, USA
    Series Name ASTWBD_NC.001
    Source Datajson Identifier True
    Source Hash 688aafe19aaf075acc90d4ce31d0286ece6b474ee5ef0331ac7be391411609b4
    Source Schema Version 1.1
    Spatial
    Temporal 2000-03-01T00:00:00Z/2013-11-30T23:59:59.999Z

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