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ASTER Global Digital Elevation Model

Entry ID: ASTGTM

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Summary

Abstract: The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) was developed jointly by the U.S. National Aeronautics and Space Administration (NASA) and Japan’s Ministry of Economy, Trade, and Industry (METI).

ASTER is capable of collecting in-track stereo using nadir- and aft-looking near infrared cameras. Since 2001, these stereo pairs have ... been used to produce single-scene (60- x 60-kilomenter (km)) digital elevation models (DEM) having vertical (root-mean-squared-error) accuracies generally between 10- and 25-meters (m).

The methodology used by Japan's Sensor Information Laboratory Corporation (SILC) to produce the ASTER GDEM involves automated processing of the entire ASTER Level-1A archive. Stereo-correlation is used to produce over one million individual scene-based ASTER DEMs, to which cloud masking is applied to remove cloudy pixels. All cloud-screened DEMS are stacked and residual bad values and outliers are removed. Selected data are averaged to create final pixel values, and residual anomalies are corrected before partitioning the data into 1 degree (°) x 1° tiles.

The ASTER GDEM covers land surfaces between 83°N and 83°S and is comprised of 22,702 tiles. Tiles that contain at least 0.01% land area are included. The ASTER GDEM is distributed as Geographic Tagged Image File Format (GeoTIFF) files with geographic coordinates (latitude, longitude). The data are posted on a 1 arc-second (approximately 30–m at the equator) grid and referenced to the 1984 World Geodetic System (WGS84)/ 1996 Earth Gravitational Model (EGM96) geoid.

While the ASTER GDEM 2 benefits from substantial improvements over GDEM 1, users are nonetheless advised that the products still may contain anomalies and artifacts that will reduce its usability for certain applications, because they can introduce large elevation errors on local scales. The data are provided “as is” and neither NASA nor METI/ERSDAC will be responsible for any damages resulting from use of the data.

V002 data set release date: 2009-06-28
V003 data set release date: 2007-03-07

Data Set Characteristics:
Geographic Extent: Global between 83º latitude
Scene Coverage: 1º x 1º tiles
Image Dimensions: 3601 x 3601
Total Number Tiles: V001: 22,604; V002: 22,702
Tile Volume: ~25MB, 6.4 MB compressed
Compression Type: zip
File Format: GEOTIFF
Map Projection: Geographic Lat/Lon
Datum: WGS84/EGM96
Resolution: 1 arcsecond (30-m horizontal posting at equator)

Related URL

Link: GET DATA > REVERB

Description: The Land Processes Distributed Active Archive Center (LP DAAC) home page contains information about the LP DAAC, its products, and its services. The Web site also provides links to ASTGTM access through Reverb and DEMEX.

Geographic Coverage

(Click for Interactive Map)

Spatial coordinates

N: 83.0

S: -83.0

E: 180.0

W: -180.0

Data Set Citation

Dataset Originator/Creator: METI/NASA

Dataset Title: ASTER Global Digital Elevation Model

Dataset Release Date: 2009-06-28

Dataset Release Place: Sioux Falls, South Dakota, USA

Dataset Publisher: NASA LP DAAC; U.S. Geological Survey

Version: V001, V002

Online Resource: https://lpdaac.usgs.gov/

Temporal Coverage

Start Date: 1945-01-01

Location Keywords

CONTINENT > NORTH AMERICA > CANADA

CONTINENT > NORTH AMERICA > CANADA > Alberta

Science Keywords

HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > NUCLEAR RADIATION EXPOSURE

SOLID EARTH > TECTONICS > EARTHQUAKES > SEISMIC PROFILE

ISO Topic Category

ENVIRONMENT

GEOSCIENTIFIC INFORMATION

Access Constraints The data are available at the url below.

Use Constraints This data set conforms to the PICCCBY Attribution License
(http://creativecommons.org/licenses/by/3.0/).

Must be cited properly

Data Set Progress

IN WORK

Originating Center

Geoscience Australia

Data Center

Australian Antarctic Data Centre, Australia

Data Center URL: http://data.aad.gov.au

Data Center Personnel
Name: DATA OFFICER AADC Phone: +61 3 6232 3244 Fax: +61 3 6232 3351 Email: metadata at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia

Personnel

JEFFREY GERARD RYAN

Role: DIF AUTHOR

Phone: 813-974-1598

Fax: 813-974-2654

Email: ryan at chuma.cas.usf.edu

Contact Address:

Department of Geology

University of South Florida

4202 East Fowler Ave, SCA 528

City: Tampa

Province or State: FL

Postal Code: 33620-5201

Country: USA

Publications/References

Ryan, J.G. and C.H. Langmuir, 1987, The systematics of lithium
abundances in young volcanic rocks. Geochimica et Cosmochimica Acta,
vol. 51, pp. 1727-1741.

Ryan, J.G. and C.H. Langmuir, 1988, Beryllium systematics in young
volcanic rocks: implications for 10Be. Geochimica et Cosmochimica
Acta, vol. 52, pp. 237-244.

Ryan, J.G. and C.H. Langmuir,1993, The systematics of boron abundances
in young volcanic rocks. Geochimica et Cosmochimica Acta vol. 57,
1489-1498.

Ryan, J.G., Leeman, W.P., Morris, J.D. and Langmuir, C.H., 1996, The
boron systematics of intraplate lavas: implications for crust and
mantle evolution. Geochimica et Cosmochimica Acta , vol. 60,
pp. 415-422.

Creation and Review Dates

DIF Creation Date: 2003-06-19

Last DIF Revision Date: 2012-01-31

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