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A typification method for linear pattern in urban building generalisation / Xianyong Gong in Geocarto international, vol 33 n° 2 (February 2018)  

Public [article]  inGeocarto international > vol 33 n° 2 (February 2018) . - pp 189 - 207 Titre : A typification method for linear pattern in urban building generalisation Type de document : Article/Communication Auteurs : Xianyong Gong, Auteur ; Fang Wu, Auteur Année de publication : 2018 Article en page(s) : pp 189 - 207 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation cartographique automatisée [Termes IGN] généralisation du bâti [Termes IGN] itération [Termes IGN] modèle linéaire [Termes IGN] reconnaissance de formes [Termes IGN] triangulation de Delaunay [Termes IGN] typification [Vedettes matières IGN] Généralisation Résumé : (Auteur) This paper presents a typification method for linear pattern in urban building generalization. The proposed method includes two processes. Firstly, structural knowledge in terms of linear pattern is detected using a two-step algorithm taking the advantages of Gestalt visual perception, computational geometry and graph theory. Spatial neighbourhood is captured using interpolated constrained Delaunay triangulation and the resulting proximity graph is pruned to be heterogeneous to get acceptable linear patterns with regard to Gestalt visual perception. Then, a typification strategy is proposed, in which typification is regarded as a progressive and iterative process consisting of elimination, exaggeration and displacement. The typification strategy iteratively executes eliminating the building with minimum overall effect, exaggerating remaining buildings considering key location and spatial characteristics and displacing them to preserve the linear pattern until elimination quantity is satisfied. Experiments show that this proposed strategy is effective and linear patterns are guaranteed with correctness and completeness. Numéro de notice : A2018-034 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/URBANISME Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2016.1240718 En ligne : https://doi.org/10.1080/10106049.2016.1240718 Format de la ressource électronique : URL Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89207 [article]

Mesh simplification for building typification / Dirk Burghardt in International journal of geographical information science IJGIS, vol 21 n° 3-4 (march - april 2007)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 21 n° 3-4 (march - april 2007) . - pp 283 - 298 Titre : Mesh simplification for building typification Type de document : Article/Communication Auteurs : Dirk Burghardt, Auteur ; A. Cecconi, Auteur Année de publication : 2007 Article en page(s) : pp 283 - 298 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] bati [Termes IGN] carte de Kohonen [Termes IGN] généralisation du bâti [Termes IGN] maillage [Termes IGN] simplification de maillage [Termes IGN] typification Résumé : (Auteur) This paper describes an approach for the typification of buildings using a mesh-simplification technique. The approach is adapted from the area of computer graphics and was originally developed for surface reconstruction and mesh simplification. The main goal was to develop an algorithm which creates fast and reproducible results. The typification procedure is modelled as a two-stage process, with the steps 'positioning' and 'representation'. While the positioning step determines the number and the position of the building objects based on Delaunay triangulation, the representation step is used to calculate the size and orientation for the replacement buildings. The results presented show the important influence of weights during positioning steps to control the object distribution. The proposed parameters are the number of objects as well as several object characteristics such as size, shape, orientation, and semantic. The approach has to be extended, if building alignments are also to be preserved. Further applications are imaginable, for instance the icon placement on dynamic maps. Copyright Taylor & Francis Numéro de notice : A2007-112 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600912323 En ligne : https://doi.org/10.1080/13658810600912323 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28475 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-07021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-07022	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Controlled line smoothing by snakes / Dirk Burghardt in Geoinformatica, vol 9 n° 3 (September - November 2005)  

Public [article]  inGeoinformatica > vol 9 n° 3 (September - November 2005) . - pp 237 - 252 Titre : Controlled line smoothing by snakes Type de document : Article/Communication Auteurs : Dirk Burghardt, Auteur Année de publication : 2005 Article en page(s) : pp 237 - 252 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] contrôle automatique [Termes IGN] déplacement d'objet géographique [Termes IGN] généralisation cartographique automatisée [Termes IGN] lissage de courbe [Termes IGN] optimisation (mathématiques) [Termes IGN] typification [Vedettes matières IGN] Généralisation Résumé : (Auteur) A major focus of research in recent years has been the development of algorithms for automated line However, combination of the algorithms with other generalization operators is a challenging problem. In this research a key aim was to extend a snakes optimization approach, allowing displacement of lines, to also be used for line smoothing. Furthermore, automated selection of control parameters is important .for fully automated solutions. An existing approach based on line segmentation was used to control the selection of smoothing parameters dependent on object characteristics. Additionally a new typification routine is presented, which uses the same preprocessed analysis for the segmentation of lines to find suitable candidates from curves bends. The typification is realized by deleting undersized bends and emphasizing the remaining curve bends. The main results of this research are two new algorithms for line generalization, where the importance of the line smoothing algorithm lies in the usage of a optimization approach which can also be used for line displacement. Numéro de notice : A2005-326 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-005-1283-3 En ligne : https://doi.org/10.1007/s10707-005-1283-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27462 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-05031	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Optimization approaches for generalization and data abstraction / Monika Sester in International journal of geographical information science IJGIS, vol 19 n° 8 - 9 (september 2005)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 19 n° 8 - 9 (september 2005) . - pp 871 - 897 Titre : Optimization approaches for generalization and data abstraction Type de document : Article/Communication Auteurs : Monika Sester, Auteur Année de publication : 2005 Article en page(s) : pp 871 - 897 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] carte de Kohonen [Termes IGN] déplacement d'objet géographique [Termes IGN] données localisées numériques [Termes IGN] extraction automatique [Termes IGN] généralisation cartographique automatisée [Termes IGN] jeu de données localisées [Termes IGN] méthode des moindres carrés [Termes IGN] optimisation (mathématiques) [Termes IGN] représentation des détails topographiques [Termes IGN] typification [Vedettes matières IGN] Généralisation Résumé : (Auteur) The availability of methods for abstracting and generalizing spatial data is vital for understanding and communicating spatial information. Spatial analysis using maps at different scales is a good example of this. Such methods are needed not only for analogue spatial data sets but even more so for digital data. In order to automate the process of generating different levels of detail of a spatial data set, generalization operations are used. The paper first gives an overview on current approaches for the automation of generalization and data abstraction, and then presents solutions for three generalization problems based on optimization techniques. Least-Squares Adjustment is used for displacement and shape simplification (here, building groundplans), and Self-Organizing Maps, a Neural Network technique, is applied for typification, i.e. a density preserving reduction of objects. The methods are validated with several examples and evaluated according to their advantages and disadvantages. Finally, a scenario describes how these methods can be combined to automatically yield a satisfying result for integrating two data sets of different scales. Numéro de notice : A2005-405 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810500161179 En ligne : https://doi.org/10.1080/13658810500161179 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27541 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-05081	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-05082	RAB	Revue	Centre de documentation	En réserve L003	Disponible