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Proceedings Paper

Evaluation of the Global Multi-Resolution Terrain Elevation Data 2010 (GMTED2010) using ICESat geodetic control
Author(s): Claudia C Carabajal; David J. Harding; Jean-Paul Boy; Jeffrey J. Danielson; Dean B. Gesch; Vijay P. Suchdeo
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Paper Abstract

Supported by NASA's Earth Surface and Interior (ESI) Program, we are producing a global set of Ground Control Points (GCPs) derived from the Ice, Cloud and land Elevation Satellite (ICESat) altimetry data. From February of 2003, to October of 2009, ICESat obtained nearly global measurements of land topography (± 86° latitudes) with unprecedented accuracy, sampling the Earth's surface at discrete ~50 m diameter laser footprints spaced 170 m along the altimetry profiles. We apply stringent editing to select the highest quality elevations, and use these GCPs to characterize and quantify spatially varying elevation biases in Digital Elevation Models (DEMs). In this paper, we present an evaluation of the soon to be released Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010). Elevation biases and error statistics have been analyzed as a function of land cover and relief. The GMTED2010 products are a large improvement over previous sources of elevation data at comparable resolutions. RMSEs for all products and terrain conditions are below 7 m and typically are about 4 m. The GMTED2010 products are biased upward with respect to the ICESat GCPs on average by approximately 3 m.

Paper Details

Date Published: 24 October 2011
PDF: 13 pages
Proc. SPIE 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications, 82861Y (24 October 2011); doi: 10.1117/12.912776
Show Author Affiliations
Claudia C Carabajal, NASA Goddard Space Flight Ctr. (United States)
David J. Harding, NASA Goddard Space Flight Ctr. (United States)
Jean-Paul Boy, Institut de Physique du Globe de Strasbourg, EOST (France)
Jeffrey J. Danielson, U.S. Geological Survey (United States)
Dean B. Gesch, U.S. Geological Survey (United States)
Vijay P. Suchdeo, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8286:
International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications
Jonathan Li, Editor(s)

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