An evaluation of the accuracy of the ASTER GDEM and the role of stack number: a case study of Nisiros Island, Greece
Identifieur interne : 000063 ( Main/Exploration ); précédent : 000062; suivant : 000064An evaluation of the accuracy of the ASTER GDEM and the role of stack number: a case study of Nisiros Island, Greece
Auteurs : George Ch. Miliaresis [Grèce] ; Charalampos V. E. Paraschou [Grèce]Source :
- Remote sensing letters : (Print) [ 2150-704X ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Wicri :
- geographic : Grèce.
English descriptors
Abstract
A reference digital elevation model (RDEM) produced by the Hellenic Military Geographical Service (HMGS) (Athens, Greece) is used to assess the vertical accuracy of the ASTER (advanced spaceborne thermal emission and reflection radiometer) global digital elevation model (GDEM) for a small volcanic island, Nisiros, in south-east Greece. The overall vertical accuracy of the GDEM is within the root mean square error (RMSE) specified by the ASTER DEM Working Group. Despite this, ASTER GDEM is a product with variable vertical accuracy depending on the number of scenes (stack number (SN)) per grid point used for the computation of elevation. The exposure (SN) of a physiographic region to ASTER sensors seems to be elevation- and slope-dependent in this particular study area. The difference between the GDEM and RDEM may partly be explained by the fact that GDEM is a digital surface model and thus the variable landcover heights introduce additional error in accuracy estimates.
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Le document en format XML
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Paraschou</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Remote Sensing Laboratory, Department of Rural & Surveying Engineering, National Technical University of Athens</s1><s2>Zographos 15780</s2><s3>GRC</s3><sZ>2 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>Zographos 15780</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Remote sensing letters : (Print)</title><idno type="ISSN">2150-704X</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Remote sensing letters : (Print)</title><idno type="ISSN">2150-704X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Greece</term><term>Space remote sensing</term><term>accuracy</term><term>digital elevation models</term><term>land cover</term><term>radiometry</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Télédétection spatiale</term><term>Modèle numérique élévation</term><term>Radiométrie</term><term>Occupation sol</term><term>Précision</term><term>Ile Nisiros</term><term>ASTER</term><term>Grèce</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Grèce</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A reference digital elevation model (RDEM) produced by the Hellenic Military Geographical Service (HMGS) (Athens, Greece) is used to assess the vertical accuracy of the ASTER (advanced spaceborne thermal emission and reflection radiometer) global digital elevation model (GDEM) for a small volcanic island, Nisiros, in south-east Greece. The overall vertical accuracy of the GDEM is within the root mean square error (RMSE) specified by the ASTER DEM Working Group. Despite this, ASTER GDEM is a product with variable vertical accuracy depending on the number of scenes (stack number (SN)) per grid point used for the computation of elevation. The exposure (SN) of a physiographic region to ASTER sensors seems to be elevation- and slope-dependent in this particular study area. The difference between the GDEM and RDEM may partly be explained by the fact that GDEM is a digital surface model and thus the variable landcover heights introduce additional error in accuracy estimates.</div></front></TEI><affiliations><list><country><li>Grèce</li></country><region><li>Attique (région)</li></region><settlement><li>Athènes</li></settlement></list><tree><country name="Grèce"><region name="Attique (région)"><name sortKey="Miliaresis, George Ch" sort="Miliaresis, George Ch" uniqKey="Miliaresis G" first="George Ch." last="Miliaresis">George Ch. Miliaresis</name></region><name sortKey="Paraschou, Charalampos V E" sort="Paraschou, Charalampos V E" uniqKey="Paraschou C" first="Charalampos V. E." last="Paraschou">Charalampos V. E. Paraschou</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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