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Earthquake prediction: new findings / S. Murai in GIM international, vol 23 n° 6 (June 2009)

Public [article]  inGIM international > vol 23 n° 6 (June 2009) . - pp 18 - 19 Titre : Earthquake prediction: new findings Type de document : Article/Communication Auteurs : S. Murai, Auteur ; H. Araki, Auteur Année de publication : 2009 Article en page(s) : pp 18 - 19 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] analyse de données [Termes IGN] Japon [Termes IGN] positionnement par GPS [Termes IGN] prévention des risques [Termes IGN] risque naturel [Termes IGN] séisme Résumé : (Auteur) Prediction of earthquakes using GPS analysis remains an unresolved but important problem. Pre-signals -changes in area measured by triangular networks of GPS receivers- were examined for many large earthquakes in Japan and in other Asian regions. We discovered that although the occurrence of location of an earthquake can be predicted, more research is required before the time of an earthquake can be precisely forecast. Numéro de notice : A2009-185 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29815 [article]

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High-resolution 3D modelling and visualization of Mount Everest / Armin W. Gruen in ISPRS Journal of photogrammetry and remote sensing, vol 57 n° 1-2 (November - December 2002)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 57 n° 1-2 (November - December 2002) . - pp 102 - 113 Titre : High-resolution 3D modelling and visualization of Mount Everest Type de document : Article/Communication Auteurs : Armin W. Gruen, Auteur ; S. Murai, Auteur Année de publication : 2002 Article en page(s) : pp 102 - 113 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] ERDAS Imagine [Termes IGN] Everest [Termes IGN] image à haute résolution [Termes IGN] image aérienne [Termes IGN] modèle numérique de terrain [Termes IGN] modélisation 3D [Termes IGN] montagne [Termes IGN] mosaïque d'images [Termes IGN] orthoimage [Termes IGN] rendu réaliste [Termes IGN] texturage [Termes IGN] texture d'image [Termes IGN] visualisation 3D [Termes IGN] vue 3D Résumé : (Auteur) In the year 1988, a new topographical map 1:50,000 of the Mount Everest region was published by the National Geographic Society. The full map content was derived from aerial images of scale 1:35,000, acquired in a 1984 photogrammetric flight. This highly acclaimed topographical map, produced with Swiss photogrammetric and cartographic know-how, serves until nowadays as an important work of reference. We took the analogue data (images, contours), converted them into digital form through scanning, and produced a texture-mapped 3D computer model. With a DTM of 10 m grid-size and natural texture pixel-size of 1 m this model is currently the best dataset available for an area of 25 by 25 km around the summit of Mount Everest. This paper reports about the production procedure of the model and shows some high-resolution photorealistic visualization results. The dataset has been used in the meantime by cartographers and animation experts for the production of new map-related visualization products and is much sought after by scientists of various disciplines. Copyright ISPRS Numéro de notice : A2002-386 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(02)00111-9 En ligne : https://doi.org/10.1016/S0924-2716(02)00111-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26410 [article]

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Development of polygon shift method for generating 3D view map of buildings / S. Murai in ISPRS Journal of photogrammetry and remote sensing, vol 54 n° 5-6 (December 1999 - January 2000)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 54 n° 5-6 (December 1999 - January 2000) . - pp 342 - 351 Titre : Development of polygon shift method for generating 3D view map of buildings Type de document : Article/Communication Auteurs : S. Murai, Auteur ; V. Phonekeo, Auteur ; K. Ono, Auteur ; S. Yasue, Auteur Année de publication : 1999 Article en page(s) : pp 342 - 351 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] bâtiment [Termes IGN] pixel [Termes IGN] polygone [Termes IGN] vue 3D Résumé : (Auteur) The authors have developed a new method termed "Polygon Shift Method" that enables the generation of a 3D view map of a city with tall buildings with a simplified procedure to shift a polygon and check the overlap between the original and shifted polygon. Boolean operations are applied with a newly defined "Fore or Aft" side and a "Depth Distance" that functionally express the visibility criteria or hidden point processing in the 3D view. Since the polygon shift method can be operated with a raster-based structure, the computer processing for generation of a 3D view map of buildings with shadow is simple and efficient. Copyright ISPRS Numéro de notice : A1999-196 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(99)00031-3 En ligne : https://doi.org/10.1016/S0924-2716(99)00031-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29452 [article]

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