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ASTER Global Water Bodies Database Attributes NetCDF V001

Metadata Updated: December 7, 2023

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_ATTNC file contains an attribute file with the water body classification information. The corresponding ASTWBD_NC data product DEM file, which provides elevation information in 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 November 12, 2020
Metadata Updated Date December 7, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Browse image for Earthdata Search

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date December 7, 2023
Publisher LP DAAC
Maintainer
Identifier C1575734760-LPDAAC_ECS
Data First Published 2011-08-24
Language en-US
Data Last Modified 2015-09-30
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_ATTNC.001. ASTER Global Water Bodies Database Attributes NetCDF V001. Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/ASTER/ASTWBD_ATTNC.001. https://doi.org/10.5067/ASTER/ASTWBD_ATTNC.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_N06E004_att.1.jpg?_ga=2.93072671.344140723.1565008229-1371303444.1563801461
Harvest Object Id f2f581a5-abe9-414d-93f7-9d3e86deeebf
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/ASTER/ASTWBD_ATTNC.001
Metadata Type geospatial
Old Spatial -180.0 -83.0 180.0 82.0
Program Code 026:001
Series Name ASTWBD_ATTNC.001
Source Datajson Identifier True
Source Hash 2aef07b4ee6925b9c5bee3ff47da023a03258a9efc67162740702971301dadd9
Source Schema Version 1.1
Spatial
Temporal 2000-03-01T00:00:00Z/2013-11-30T23:59:59.999Z

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