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An aggregated graph to qualify historical spatial networks using temporal patterns detection / Benoit Costes (2015)
Titre : An aggregated graph to qualify historical spatial networks using temporal patterns detection Type de document : Article/Communication Auteurs : Benoit Costes , Auteur ; Julien Perret , Auteur ; Bénédicte Bucher , Auteur ; Maurizio Gribaudi, Auteur Editeur : Association of Geographic Information Laboratories in Europe AGILE Année de publication : 2015 Conférence : AGILE 2015, 18th International Conference on Geographic Information Science, Geographic Information Science as an enabler of smarter cities and communities 09/06/2015 12/06/2015 Lisbonne Portugal OA Proceedings Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] carte ancienne
[Termes IGN] cohérence des données
[Termes IGN] détection d'anomalie
[Termes IGN] graphe
[Termes IGN] modèle topologique complet
[Termes IGN] Paris (75)
[Termes IGN] réseau routierRésumé : (auteur) This paper introduces a model of an aggregated graph suitable to study dynamics of city street networks, and a method to build it. Using temporal pattern detection, it allows detecting inconsistencies in historical spatial networks attributable mainly to old maps themselves, without ground truth data but by comparing each data with each other, and helps to take into account their imperfections such as differences in levels of detail, incompleteness, fuzzy temporalisation, geometric inaccuracies and so on, in the objective of performing further spatio-temporal analyses with corrected data. Our model is applied on Paris old street network at five different temporalities. Numéro de notice : C2015-011 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl En ligne : https://agile-online.org/index.php/conference/proceedings/proceedings-2015 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81041 Documents numériques
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An aggregated graphAdobe Acrobat PDF Automatic construction of 3-D building model from airborne LIDAR data through 2-D snake algorithm / Jianhua Yan in IEEE Transactions on geoscience and remote sensing, vol 53 n° 1 (January 2015)
[article]
Titre : Automatic construction of 3-D building model from airborne LIDAR data through 2-D snake algorithm Type de document : Article/Communication Auteurs : Jianhua Yan, Auteur ; Keqi Zhang, Auteur ; Chengcui Zhang, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 3 - 14 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] algorithme snake
[Termes IGN] données lidar
[Termes IGN] modèle numérique du bâti
[Termes IGN] reconstruction 2D du bâti
[Termes IGN] reconstruction 3D du bâti
[Termes IGN] topologieRésumé : (Auteur) The snake algorithm has been proposed to solve many remote sensing and computer vision problems such as object segmentation, surface reconstruction, and object tracking. This paper introduces a framework for 3-D building model construction from LIDAR data based on the snake algorithm. It consists of nonterrain object identification, building and tree separation, building topology extraction, and adjustment by the snake algorithm. The challenging task in applying the snake algorithm to building topology adjustment is to find the global minima of energy functions derived for 2-D building topology. The traditional snake algorithm uses dynamic programming for computing the global minima of energy functions which is limited to snake problems with 1-D topology (i.e., a contour) and cannot handle problems with 2-D topology. In this paper, we have extended the dynamic programming method to address the snake problems with a 2-D planar topology using a novel graph reduction technique. Given a planar snake, a set of reduction operations is defined and used to simplify the graph of the planar snake into a set of isolated vertices while retaining the minimal energy of the graph. Another challenging task for 3-D building model reconstruction is how to enforce different kinds of geometric constraints during building topology refinement. This framework proposed two energy functions, deviation and direction energy functions, to enforce multiple geometric constraints on 2-D topology refinement naturally and efficiently. To examine the effectiveness of the framework, the framework has been applied on different data sets to construct 3-D building models from airborne LIDAR data. The results demonstrate that the proposed snake algorithm successfully found the global optima in polynomial time for all of the building topologies and generated satisfactory 3-D models for most of the buildings in the study areas. Numéro de notice : A2015-039 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2014.2312393 En ligne : https://doi.org/10.1109/TGRS.2014.2312393 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75121
in IEEE Transactions on geoscience and remote sensing > vol 53 n° 1 (January 2015) . - pp 3 - 14[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2015011 RAB Revue Centre de documentation En réserve L003 Disponible Extended random walker-based classification of hyperspectral images / Xudong Kang in IEEE Transactions on geoscience and remote sensing, vol 53 n° 1 (January 2015)
[article]
Titre : Extended random walker-based classification of hyperspectral images Type de document : Article/Communication Auteurs : Xudong Kang, Auteur ; Shutao Li, Auteur ; Leyuan Fang, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 144 - 153 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] classification par séparateurs à vaste marge
[Termes IGN] classification spectrale
[Termes IGN] graphe
[Termes IGN] image hyperspectrale
[Termes IGN] segmentation d'imageRésumé : (Auteur) This paper introduces a novel spectral-spatial classification method for hyperspectral images based on extended random walkers (ERWs), which consists of two main steps. First, a widely used pixelwise classifier, i.e., the support vector machine (SVM), is adopted to obtain classification probability maps for a hyperspectral image, which reflect the probabilities that each hyperspectral pixel belongs to different classes. Then, the obtained pixelwise probability maps are optimized with the ERW algorithm that encodes the spatial information of the hyperspectral image in a weighted graph. Specifically, the class of a test pixel is determined based on three factors, i.e., the pixelwise statistics information learned by a SVM classifier, the spatial correlation among adjacent pixels modeled by the weights of graph edges, and the connectedness between the training and test samples modeled by random walkers. Since the three factors are all well considered in the ERW-based global optimization framework, the proposed method shows very good classification performances for three widely used real hyperspectral data sets even when the number of training samples is relatively small. Numéro de notice : A2015-030 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2014.2319373 En ligne : https://doi.org/10.1109/TGRS.2014.2319373 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75111
in IEEE Transactions on geoscience and remote sensing > vol 53 n° 1 (January 2015) . - pp 144 - 153[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2015011 RAB Revue Centre de documentation En réserve L003 Disponible Graph-based synchronous collaborative mapping / Xiaochen Kang in Geocarto international, vol 30 n° 1 - 2 (January - February 2015)
[article]
Titre : Graph-based synchronous collaborative mapping Type de document : Article/Communication Auteurs : Xiaochen Kang, Auteur Année de publication : 2015 Article en page(s) : pp 28 - 47 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] cartographie collaborative
[Termes IGN] corrélation à l'aide de traits caractéristiques
[Termes IGN] corrélation automatique de points homologues
[Termes IGN] graphe
[Termes IGN] synchronisationRésumé : (auteur) Collaborative mapping is different from other collaborative editing systems because of spatial characterization and spatial dependence. Spatial operations on a mapping feature influence that feature and also the neighbouring features. Therefore, conflicts are likely to occur if common features or interrelated features are processed concurrently. For collaborative editing systems, the widely used multiversioning technique enables improved concurrency, which, however, is at the cost of synchronous data consistency. To maintain the synchronous consistency in collaborative mapping, a practical framework called the spatial operation dependence graph is proposed. The features are expressed as graph vertexes, while the dependences among the operations on features are expressed as graph edges. Through maintaining locking statuses of the vertexes, interdependent operations on features are arbitrated according to the temporal order, while independent operations can concurrently proceed. The utility of this framework is demonstrated through a prototype system, Co-Mapping. Numéro de notice : A2015-244 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2014.883437 En ligne : https://doi.org/10.1080/10106049.2014.883437 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76242
in Geocarto international > vol 30 n° 1 - 2 (January - February 2015) . - pp 28 - 47[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2015011 RAB Revue Centre de documentation En réserve L003 Disponible
Titre : Methods of Mathematical Modelling : Continuous Systems and Differential Equations Type de document : Guide/Manuel Auteurs : Thomas Witelski, Auteur ; Mark Bowen, Auteur Editeur : Springer International Publishing Année de publication : 2015 Importance : 324 p. Format : 16 x 24 cm ISBN/ISSN/EAN : 978-3-319-23042-9 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Mathématique
[Termes IGN] analyse mathématique
[Termes IGN] calcul différentiel
[Termes IGN] calcul variationnel
[Termes IGN] équation différentielle
[Termes IGN] équation linéaire
[Termes IGN] modèle mathématique
[Termes IGN] série de Fourier
[Termes IGN] variableRésumé : (éditeur) This book presents mathematical modelling and the integrated process of formulating sets of equations to describe real-world problems. It describes methods for obtaining solutions of challenging differential equations stemming from problems in areas such as chemical reactions, population dynamics, mechanical systems, and fluid mechanics. Chapters 1 to 4 cover essential topics in ordinary differential equations, transport equations and the calculus of variations that are important for formulating models. Chapters 5 to 11 then develop more advanced techniques including similarity solutions, matched asymptotic expansions, multiple scale analysis, long-wave models, and fast/slow dynamical systems. Methods of Mathematical Modelling will be useful for advanced undergraduate or beginning graduate students in applied mathematics, engineering and other applied sciences. Note de contenu : Part I- Formulation of Models
1- Rate equations
2- Transport equations
3- Variational principles
4- Dimensional scaling analysis
Part II- Solution Techniques
5- Self-similar scaling solutions of differential equations
6- Perturbation methods
7- Boundary layer theory
8- Long-wave asymptotics for PDE problems
9- Weakly-nonlinear oscillators
10- Fast/slow dynamical systems
11- Reduced models for PDE problems
Part III- Case Studies
12- Modelling in applied fluid dynamics
EpilogueNuméro de notice : 25830 Affiliation des auteurs : non IGN Thématique : MATHEMATIQUE Nature : Manuel En ligne : https://doi.org/10.1007/978-3-319-23042-9 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95152 PermalinkOpenStreetMap in GIScience / Jamal Jokar Arsanjani (2015)PermalinkGeneralizations of bounds on the index of convergence to weighted digraphs / Glenn Merlet in Discrete Applied Mathematics, vol 178 ([11/12/2014])PermalinkLes cartogrammes : une séquence d'enseignement de la sémiologie à la géographie / Dominique Andrieu in Cartes & Géomatique, n° 222 (décembre 2014)PermalinkDetecting and analyzing mobility hotspots using surface networks / Y. Hu in Transactions in GIS, vol 18 n° 6 (December 2014)PermalinkMulti-UAV surveillance over forested regions / Vengatesan Govindaraju in Photogrammetric Engineering & Remote Sensing, PERS, vol 80 n° 12 (December 2014)PermalinkSemisupervised manifold alignment of multimodal remote sensing images / Devis Tuia in IEEE Transactions on geoscience and remote sensing, vol 52 n° 12 (December 2014)PermalinkSemi-supervised classification for hyperspectral imagery based on spatial-spectral Label Propagation / L. Wang in ISPRS Journal of photogrammetry and remote sensing, vol 97 (November 2014)PermalinkTraitement d’images satellitaires à très haute résolution spatiale et identification de zones à enjeux dans l’aménagement des Trames Vertes urbaines / Pauline Crombette in Revue Française de Photogrammétrie et de Télédétection, n° 208 (Octobre 2014)PermalinkCharacterisation of building alignments with new measures using C4.5 decision tree algorithm / Sinan Cetinkaya in Geodetski vestnik, vol 58 n° 3 ([01/09/2014])Permalink