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Automating the administration boundary design process using hierarchical spatial reasoning theory and geographical information system / S. Eagleson in International journal of geographical information science IJGIS, vol 17 n° 2 (march 2003)
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[article]
Titre : Automating the administration boundary design process using hierarchical spatial reasoning theory and geographical information system Type de document : Article/Communication Auteurs : S. Eagleson, Auteur ; Francisco Escobar, Auteur ; Ian Williamson, Auteur Année de publication : 2003 Article en page(s) : pp 99 - 118 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] analyse spatiale
[Termes IGN] approche hiérarchique
[Termes IGN] ArcView
[Termes IGN] Avenue (langage)
[Termes IGN] congruence
[Termes IGN] intégration de données
[Termes IGN] limite administrative
[Termes IGN] polygone
[Termes IGN] raisonnement spatial
[Termes IGN] système d'information géographiqueRésumé : (Auteur) This paper addresses the problems associated with the integration of data between incongruent boundary systems. Currently, the majority of spatial boundaries are designed in an uncoordinated manner with individual organizations generating individual boundaries to meet individual needs. As a result, current technologies for analysing geospatial information, such as geographical information systems (GISs), are not reaching their full potential. In response to the problem of uncoordinated boundaries, the authors present an algorithm for the hierarchical structuring of administrative boundaries. This algorithm applies hierarchical spatial reasoning (HSR) theory to the automated structuring of polygons. In turn, these structured boundary systems facilitate accurate data integration and analysis whilst meeting the spatial requirements of selected agencies. The algorithm is presented in two parts. The first part outlines previous research undertaken by the authors into the delineation of administrative boundaries in metropolitan regions. The second part outlines the distinctly different constraints required for administrativeboundary design in rural areas. The development of the algorithm has taken place in a GIS environment utilizing Avenue, an objectorientated programming language that operates under ArcView, the desktop software developed and distributed by ESRI. Numéro de notice : A2003-092 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/713811748 En ligne : https://doi.org/10.1080/713811748 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22388
in International journal of geographical information science IJGIS > vol 17 n° 2 (march 2003) . - pp 99 - 118[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-03021 RAB Revue Centre de documentation En réserve L003 Disponible 079-03022 RAB Revue Centre de documentation En réserve L003 Disponible Fabrication de vraies ortho-images et correction des ombres / Didier Boldo in Bulletin d'information scientifique et technique de l'IGN, n° 74 (mars 2003)
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Titre : Fabrication de vraies ortho-images et correction des ombres Type de document : Article/Communication Auteurs : Didier Boldo , Auteur
Année de publication : 2003 Article en page(s) : pp 25 - 36 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] accentuation de contours
[Termes IGN] contour
[Termes IGN] corrélation automatique de points homologues
[Termes IGN] gradient
[Termes IGN] modèle numérique de surface
[Termes IGN] ombre
[Termes IGN] orthoimage
[Termes IGN] orthoimage intégrale
[Termes IGN] segmentation d'imageRésumé : (Auteur) [introduction] Cet article est consacré à une méthode permettant de fabriquer automatiquement de vraies ortho-images (avec bâtiments redressés). Cette méthode s'appuie sur une amélioration des Modèles Numériques de Surface (MNS) obtenus par corrélation. En effet, ceux-ci ont des limites de bâtiments relativement imprécises et leur utilisation directe pour les vraies ortho-images, calculées à partir de chaque images d'origine, sont ensuite fusionnées pour obtenir l'ortho-image finale. Afin d'améliorer la lisibilité du résultat, un modèle radiométrique adapté aux zones urbaines est utilisé pour la correction des ombres. Numéro de notice : A2003-427 Affiliation des auteurs : MATIS (1993-2011) Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26507
in Bulletin d'information scientifique et technique de l'IGN > n° 74 (mars 2003) . - pp 25 - 36[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 015-03011 RAB Revue Centre de documentation En réserve L003 Disponible Documents numériques
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Fabrication de vraies ortho-images ... - pdf éditeurAdobe Acrobat PDFRoof boundary extraction using multiple images / Ahmed F. Elaksher in Photogrammetric record, vol 18 n° 101 (March - May 2003)
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Titre : Roof boundary extraction using multiple images Type de document : Article/Communication Auteurs : Ahmed F. Elaksher, Auteur ; J.S. Bethel, Auteur ; E. Mikhail, Auteur Année de publication : 2003 Article en page(s) : pp 27 - 40 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] appariement géométrique
[Termes IGN] classification dirigée
[Termes IGN] cohérence géométrique
[Termes IGN] contour
[Termes IGN] courbe épipolaire
[Termes IGN] détection de contours
[Termes IGN] exhaustivité des données
[Termes IGN] image aérienne
[Termes IGN] méthode robuste
[Termes IGN] milieu urbain
[Termes IGN] photo-interprétation assistée par ordinateur
[Termes IGN] polygone
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] segmentation d'imageRésumé : (Auteur) Urban area building extraction is one of the most challenging problems in photogrammetry. Wellextracted buildings are needed for a variety of applications, such as cartography, building GIS databases for cities, and urban planning. This paper presents a new technique to extract 3D building wireframes using a robust multiimage linematching algorithm. Although one pair of images is adequate to find the 3D position of two visibly corresponding image, features, it is not sufficient to solve the general building extraction problem due to obscured parts in the building. Four images are used in this research to extract the building wireframes. First the images are segmented into regions. Regions are then classified into roof regions and nonroof regions based on their size, shape, and intensity values. The roof region boundary pixels are located and used to find the region perimeters. Region correspondence is solved in a pairwise mode over all images using the epipolar constraint, region size, region shape, and region intensity values. Image lines within the corresponding regions are matched over all images simultaneously by first creating a plane for each region line. Planes are then intersected simultaneously and geometric consistency is used to determine acceptance or rejection. Results with high overlap and sidelap aerial images are presented and evaluated. The results show the completeness and accuracy that this method can provide for extracting complex urban buildings. The average coordinate accuracy is about 08 m using 1:4000 scale aerial photographs scanned at 30 um Six buildings were examined; the line detection rate is 98%. Numéro de notice : A2003-091 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/0031-868X.t01-1-00003 En ligne : https://doi.org/10.1111/0031-868X.t01-1-00003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22387
in Photogrammetric record > vol 18 n° 101 (March - May 2003) . - pp 27 - 40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 106-03011 RAB Revue Centre de documentation En réserve L003 Disponible Automatic matching and three-dimensional reconstruction of free-form linear features from stereo images / A.F. Habib in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 2 (February /2003)
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Titre : Automatic matching and three-dimensional reconstruction of free-form linear features from stereo images Type de document : Article/Communication Auteurs : A.F. Habib, Auteur ; Y.R. Lee, Auteur ; M. Morgan, Auteur Année de publication : 2003 Article en page(s) : pp 189 - 197 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] appariement de formes
[Termes IGN] contour
[Termes IGN] couple stéréoscopique
[Termes IGN] courbe épipolaire
[Termes IGN] géométrie épipolaire
[Termes IGN] milieu urbain
[Termes IGN] objet géographique linéaire
[Termes IGN] photographie à grande échelle
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] transformation de HoughRésumé : (Auteur) Automatic matching of freeform linear features in overlapping largescale imagery over urban areas still remains to be a problem in both the photogrammetric and computer vision communities. Although there is a variety of algorithms that have been developed to solve this problem, reliable results are not always guaranteed. Differences in illumination conditions, relief displacement, and occlusions are some of the factors that make solving the matching problem more challenging. The deficiency of available techniques stems from the fact that they do not consider the perspective geometry of the imaging system in the matching process. Moreover, it is usually assumed that conjugate entities are almost exact copies of each other (this is rarely the case). The need for a reliable algorithm that can handle largescale imagery over urban areas is growing, especially with the increasing availability of high resolution aerial imagery. In this research, a new approach for automatic matching and threedimensional reconstruction of freeform linear features from stereo images is proposed. The suggested strategy is based on The Modified Iterated Hough Transform (MIHT) for Robust Parameter Estimation, MIHT relies on the mathematical relationship between conjugate entities (the coplanarity condition when dealing with a stereo pair). As a result, it overcomes problems arising from relief displacements and/or occlusions. Moreover, MIHT simultaneously solves for the relative orientation parameters as well as the correspondence between conjugate entities in a stereo pair. Matching ambiguities along and across conjugate epipolar lines are observed in the correspondence output from MIHT. Ambiguities along the epipolar lines stem from the nature of the coplanarity model, which establishes the correspondence between conjugate epipolar lines rather than conjugate points. On the other hand, ambiguities across the epipolar lines are expected due to the discrete cell size of the implemented accumulator array in MIHT. In this work, the ambiguities are resolved through several pruning techniques such as correlation coefficient, edge connectivity, height information, and epipolar geometry. Conjugate entities with subpixel accuracy are finally used to reconstruct accurate and reliable threedimensional imagespace discontinuities. Various experiments using largescale imagery over urban areas proved the reliability and robustness of the proposed method. Numéro de notice : A2003-014 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.2.189 En ligne : https://doi.org/10.14358/PERS.69.2.189 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22312
in Photogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 2 (February /2003) . - pp 189 - 197[article]Robust reconstruction of building models from three-dimensional line segments / Jiann-Yeou Rau in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 2 (February /2003)
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Titre : Robust reconstruction of building models from three-dimensional line segments Type de document : Article/Communication Auteurs : Jiann-Yeou Rau, Auteur ; L.C. Chen, Auteur Année de publication : 2003 Article en page(s) : pp 181 - 188 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] automatisation
[Termes IGN] contour
[Termes IGN] extraction semi-automatique
[Termes IGN] méthode robuste
[Termes IGN] niveau du sol
[Termes IGN] primitive volumique
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] segment de droiteRésumé : (Auteur) This paper presents a novel method for semiautomatically constructing building models from photogrammetric 3D line segments of buildings, i.e., their roof edges. The method, which we call "Split MergeShape" (SMS), can treat both complete line segments as well as incomplete line segments due to image occlusions. The proposed method is comprised of five major parts: (1) the creation of the Region of Interest (ROI) and preprocessing, (2) splitting the model by using the 3D line segments to construct a combination of roof primitives, (3) merging connected roof primitives to complete the boundary of each building, (4) shaping each building rooftop by connected coplanar analysis and coplanar fitting, and (5) quality assurance. The experimental results indicate that the proposed method can soundly rebuild the topology from the 3D line segments and reconstruct building models with up to a 98 percent success rate. The proposed SMS method has been proved reliable and effective, with a high degree of automation, even when groups of connected buildings or complex types of buildings are processed. Numéro de notice : A2003-013 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.2.181 En ligne : https://doi.org/10.14358/PERS.69.2.181 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22311
in Photogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 2 (February /2003) . - pp 181 - 188[article]Semiautomated building extraction based on CSG model-image fitting / Yi-Hsing Tseng in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 2 (February /2003)
PermalinkAn algorithm for the generation of Voronoi diagrams on the sphere based on QTM [quaternary triangular mesh] / Jun Chen in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 1 (January 2003)
PermalinkPermalinkPermalinkB-spline functions and wavelets for geographic line generalization / Eric Saux in Cartography and Geographic Information Science, vol 30 n° 1 (January 2003)
PermalinkConception et mise en place d'un polygone d'étalonnage des caméras numériques sur le site de l'école nationale des sciences géographiques / S. Oueslati (2003)
PermalinkPermalinkDétermination du juste milieu d'objets topographiques, orientée délimitation maritime [au] service géodésie et nivellement de l'IGN / O. Minot (2003)
PermalinkDéveloppement en harmoniques sphériques de la contribution au potentiel de gravité d'un volume polyédrique représenté par sa surface externe / E. Thomas (2003)
PermalinkDéveloppement d'indicateurs géomorphométriques à partir de modèles numériques de terrain / Olivier Passalacqua (2003)
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