Orthophoto generation using IKONOS imagery and high-resolution DEM: a case study on volcanic hazard monitoring of Nisyros Island (Greece)
Identifieur interne : 000194 ( Main/Exploration ); précédent : 000193; suivant : 000195Orthophoto generation using IKONOS imagery and high-resolution DEM: a case study on volcanic hazard monitoring of Nisyros Island (Greece)
Auteurs : S. Vassilopoulou [Suisse] ; L. Hurni [Suisse] ; V. Dietrich [Suisse] ; E. Baltsavias [Suisse] ; M. Pateraki [Suisse] ; E. Lagios [Grèce] ; I. Parcharidis [Grèce]Source :
- ISPRS journal of photogrammetry and remote sensing [ 0924-2716 ] ; 2002.
Descripteurs français
- Pascal (Inist)
- Wicri :
- geographic : Grèce.
- topic : Cartographie, Risque naturel.
English descriptors
- KwdEn :
Abstract
Georeferenced high-resolution satellite images can be used for acquisition of topographic information, navigation and visualisation for various environmental studies. The present study is part of the multidisciplinary EU project GEOWARN related to monitoring, warning and emergency planning for volcanic hazards in the island of Nisyros, Greece. Here, the main aim was the orthorectification of a 1-m resolution pan-sharpened IKONOS Geo image of Nisyros island. For the orthorectification, a digital elevation model (DEM) with a cell size of 2 m and an RMS accuracy of ca. 3.5 m was used, as well as 38 selected ground control points (GCPs) measured with differential GAS. An object-to-pixel space transformation using the ground control points was computed using two different models, a relief-corrected affine transformation and the polynomial mapping functions of Kratky. These transformations were used for orthorectification and the orthophoto accuracy was evaluated using GCPs as check points. Postprocessing for radiometric improvement of the orthophotos was applied. The orthophoto and the DEM served as basic tools for subsequent base mapping and visualisation.
Affiliations:
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Vassilopoulou</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Cartography, Swiss Federal Institute of Technology, ETH-Hönggerberg</s1><s2>8093 Zurich</s2><s3>CHE</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Suisse</country><wicri:noRegion>8093 Zurich</wicri:noRegion></affiliation></author><author><name sortKey="Hurni, L" sort="Hurni, L" uniqKey="Hurni L" first="L." last="Hurni">L. Hurni</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute of Cartography, Swiss Federal Institute of Technology, ETH-Hönggerberg</s1><s2>8093 Zurich</s2><s3>CHE</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Suisse</country><wicri:noRegion>8093 Zurich</wicri:noRegion></affiliation></author><author><name sortKey="Dietrich, V" sort="Dietrich, V" uniqKey="Dietrich V" first="V." last="Dietrich">V. Dietrich</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institute of Mineralogy and Petrography, Swiss Federal Institute of Technology, ETH-Zentrum</s1><s2>8092 Zurich</s2><s3>CHE</s3><sZ>3 aut.</sZ></inist:fA14><country>Suisse</country><wicri:noRegion>8092 Zurich</wicri:noRegion></affiliation></author><author><name sortKey="Baltsavias, E" sort="Baltsavias, E" uniqKey="Baltsavias E" first="E." last="Baltsavias">E. Baltsavias</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Institute of Geodesy and Photogrammetry, Swiss Federal Institute of Technology, ETH-Hönggerberg</s1><s2>8093 Zurich</s2><s3>CHE</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Suisse</country><wicri:noRegion>8093 Zurich</wicri:noRegion></affiliation></author><author><name sortKey="Pateraki, M" sort="Pateraki, M" uniqKey="Pateraki M" first="M." last="Pateraki">M. 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Parcharidis</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Space Applications Unit in Geosciences, Laboratory of Geophysics, University of Athens, Panepistimiopolis, Ilissia</s1><s2>Athens 157 84</s2><s3>GRC</s3><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>Athens 157 84</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">ISPRS journal of photogrammetry and remote sensing</title><title level="j" type="abbreviated">ISPRS j. photogramm. remote sens.</title><idno type="ISSN">0924-2716</idno><imprint><date when="2002">2002</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">ISPRS journal of photogrammetry and remote sensing</title><title level="j" type="abbreviated">ISPRS j. photogramm. remote sens.</title><idno type="ISSN">0924-2716</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Global Positioning System</term><term>Greece</term><term>Natural hazards</term><term>Pixel</term><term>accuracy</term><term>cartography</term><term>digital elevation models</term><term>high resolution</term><term>image analysis</term><term>imagery</term><term>information systems</term><term>islands</term><term>models</term><term>mountains</term><term>planning</term><term>relief</term><term>risk assessment</term><term>volcanic risk</term><term>volcanoes</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Grèce</term><term>Ile</term><term>Volcan</term><term>Analyse image</term><term>Imagerie</term><term>Haute résolution</term><term>Risque volcanique</term><term>Planification</term><term>Modèle</term><term>Précision</term><term>Pixel</term><term>Relief</term><term>Massif montagneux</term><term>Modèle numérique élévation</term><term>Système GPS</term><term>Cartographie</term><term>Ile Nisyros</term><term>Système information</term><term>Risque naturel</term><term>Analyse risque</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Grèce</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Cartographie</term><term>Risque naturel</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Georeferenced high-resolution satellite images can be used for acquisition of topographic information, navigation and visualisation for various environmental studies. The present study is part of the multidisciplinary EU project GEOWARN related to monitoring, warning and emergency planning for volcanic hazards in the island of Nisyros, Greece. Here, the main aim was the orthorectification of a 1-m resolution pan-sharpened IKONOS Geo image of Nisyros island. For the orthorectification, a digital elevation model (DEM) with a cell size of 2 m and an RMS accuracy of ca. 3.5 m was used, as well as 38 selected ground control points (GCPs) measured with differential GAS. An object-to-pixel space transformation using the ground control points was computed using two different models, a relief-corrected affine transformation and the polynomial mapping functions of Kratky. These transformations were used for orthorectification and the orthophoto accuracy was evaluated using GCPs as check points. Postprocessing for radiometric improvement of the orthophotos was applied. The orthophoto and the DEM served as basic tools for subsequent base mapping and visualisation.</div></front></TEI><affiliations><list><country><li>Grèce</li><li>Suisse</li></country></list><tree><country name="Suisse"><noRegion><name sortKey="Vassilopoulou, S" sort="Vassilopoulou, S" uniqKey="Vassilopoulou S" first="S." last="Vassilopoulou">S. Vassilopoulou</name></noRegion><name sortKey="Baltsavias, E" sort="Baltsavias, E" uniqKey="Baltsavias E" first="E." last="Baltsavias">E. Baltsavias</name><name sortKey="Dietrich, V" sort="Dietrich, V" uniqKey="Dietrich V" first="V." last="Dietrich">V. Dietrich</name><name sortKey="Hurni, L" sort="Hurni, L" uniqKey="Hurni L" first="L." last="Hurni">L. Hurni</name><name sortKey="Pateraki, M" sort="Pateraki, M" uniqKey="Pateraki M" first="M." last="Pateraki">M. Pateraki</name></country><country name="Grèce"><noRegion><name sortKey="Lagios, E" sort="Lagios, E" uniqKey="Lagios E" first="E." last="Lagios">E. Lagios</name></noRegion><name sortKey="Parcharidis, I" sort="Parcharidis, I" uniqKey="Parcharidis I" first="I." last="Parcharidis">I. Parcharidis</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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