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25 June 2021 | dataset

ASTER Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) - Kiribati

The ASTER Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global digital elevation model (DEM) of land areas on Earth at a spatial resolution of 1 arc second (approximately 30 meter horizontal posting at the equator).

The development of the ASTER GDEM data products is a collaborative effort between National Aeronautics and Space Administration (NASA) and Japan’s Ministry of Economy, Trade, and Industry (METI). The ASTER GDEM data products are created by the Sensor Information Laboratory Corporation (SILC) in Tokyo.

The ASTER GDEM Version 3 data product was created from the automated processing of the entire ASTER Level 1A archive of scenes acquired between March 1, 2000, and November 30, 2013. Stereo correlation was used to produce over one million individual scene based ASTER DEMs, to which cloud masking was applied. All cloud screened DEMs and non-cloud screened DEMs were stacked. Residual bad values and outliers were removed. In areas with limited data stacking, several existing reference DEMs were used to supplement ASTER data to correct for residual anomalies. Selected data were averaged to create final pixel values before partitioning the data into 1° by 1° tiles with a one pixel overlap. To correct elevation values of water body surfaces, the ASTER Global Water Bodies Database (ASTWBD) Version 1 data product was also generated.

The geographic coverage of the ASTER GDEM extends from 83° North to 83° South. Each tile is distributed in GeoTIFF format and projected on the 1984 World Geodetic System (WGS84)/1996 Earth Gravitational Model (EGM96) geoid. Each of the 22,912 tiles in the collection contain at least 0.01% land area.

Data and Resource

zip
1 arc-second Digital Elevation Model and Hillshade

Resource contains raster files for a Digital…

Field Value
Publisher Environment and Conservation Division-MELAD
Modified 09 April 2022
Release Date 25 June 2021
Source URL https://lpdaac.usgs.gov/products/astgtmv003/
Identifier 07c91029-62a8-4aac-8598-340a1bb25c9c
Spatial / Geographical Coverage Location Kiribati
Relevant Countries Kiribati
License Public
[Open Data]
Contact Name Sensor Information Laboratory Corporation
POD Theme Land, Inland Waters