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Automated generation of schematic network maps adaptive to display sizes / Peng Ti in Cartographic journal (the), Vol 52 n° 2 (May 2015)
[article]
Titre : Automated generation of schematic network maps adaptive to display sizes Type de document : Article/Communication Auteurs : Peng Ti, Auteur ; Zhilin Li, Auteur ; Zhu Xu, Auteur Année de publication : 2015 Article en page(s) : pp 168 - 176 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] analyse de données
[Termes IGN] cartographie
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] lisibilité perceptive
[Termes IGN] représentation des données
[Termes IGN] réseau de transportRésumé : (Auteur) Schematic maps have been popularly used for the representation of metro (or underground) lines and nowadays have also been used for the representation of other network maps. This paper presents a strategy for automated generation of schematic network maps for different display sizes, based on a redistribution of line density. This strategy consists of three steps: (a) estimation of spatial density of the network maps, (b) automated redistribution of line density in order to improve map clarity, for different display sizes, and (c) automated generation of schematic representations. An experimental evaluation has been carried out by using two sets of real-life network data. The results indicate that this strategy is able to generate schematic maps with much improved clarity for different display sizes and well-preserved map recognition. Numéro de notice : A2015-764 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00087041.2015.1119466 En ligne : http://dx.doi.org/10.1080/00087041.2015.1119466 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78802
in Cartographic journal (the) > Vol 52 n° 2 (May 2015) . - pp 168 - 176[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-2015021 RAB Revue Centre de documentation En réserve L003 Disponible Symbolization and generalization to map water pipe data flow and water quality at different scales / Anne Ruas in Cartographic journal (the), Vol 52 n° 2 (May 2015)
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Titre : Symbolization and generalization to map water pipe data flow and water quality at different scales Type de document : Article/Communication Auteurs : Anne Ruas , Auteur ; Ha Pham, Auteur Année de publication : 2015 Article en page(s) : pp 149 - 158 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] conception cartographique
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] niveau de détail
[Termes IGN] pollution des eaux
[Termes IGN] représentation multiple
[Termes IGN] réseau de distribution d'eau
[Termes IGN] réseau technique souterrain
[Termes IGN] visualisation cartographique
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Mapping drinking water flow is a real challenge not only to detect water leaks but also to control the quality of the water. In France, 900,000 km of water pipe serves 99% of the population. A recent law imposes the mapping of these pipelines on a known geographical system with a planar positional accuracy from 0.4 to 1.5 m according to the age and type of the pipeline. Wireless sensors and models based on computational fluid mechanics (CFD) allow to study flow and to reconstruct parameters such as velocity, pressure and a chemical concentration at each point. This information can be used to detect leaks and to control the concentration of chlorine or other chemical products. However, this information is not easy to map on GIS due to the small width of water pipe and the very high quantity of points necessary for data flow computation. In this research work, we propose solutions to map this information at different levels of detail with other information such as roads and buildings. We first propose to use area symbols instead of punctual symbols to improve zoom-in visual effects. We also propose to generalize initial water data for zoom-out processes. We use the axis of the water pipe as basic geometry and we segment it. We then compute a generalized value of pressure, velocity or chemical concentration for each segment with specific function adapted to the property we wish to study. We propose a conceptual data schema that describes the required information to map this data at different levels of detail. The solution has been fully implemented on experimental data and illustrated by means of a dedicated web mapping that proposes a set of GIS functions such as the selection of the data, zooming functions but also the animation to see the propagation of a chemical product in the water pipe. Numéro de notice : A2015-767 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00087041.2015.1119465 En ligne : http://dx.doi.org/10.1080/00087041.2015.1119465 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78821
in Cartographic journal (the) > Vol 52 n° 2 (May 2015) . - pp 149 - 158[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-2015021 RAB Revue Centre de documentation En réserve L003 Disponible Towards better WMS maps through the use of the styled layer descriptor and cartographic conflict resolution for linear features / Ionuţ Iosifescu Enescu in Cartographic journal (the), Vol 52 n° 2 (May 2015)
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Titre : Towards better WMS maps through the use of the styled layer descriptor and cartographic conflict resolution for linear features Type de document : Article/Communication Auteurs : Ionuţ Iosifescu Enescu, Auteur ; Nadia H. Panchaud, Auteur ; Magnus Heittzler, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 125 - 136 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] analyse comparative
[Termes IGN] cartographie par internet
[Termes IGN] conflit d'espace
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] objet cartographique
[Termes IGN] Styled Layer Descriptor
[Termes IGN] Web Map ServiceRésumé : (Auteur) The Open Geospatial Consortium (OGC) Web Map Service (WMS) and Styled Layer Descriptor (SLD) standards define a way of dynamically producing maps from vector data. However, this dynamic process often results in maps that are not easily readable when the underlying data are automatically represented at smaller scales than the original data were intended for. Fortunately, the SLD rules can be decoded, the symbolization rules translated into geometrical features, and cartographic conflicts detected and partially solved. The conflicting features can be identified based on the use of few basic geospatial analysis functions. After a solution that minimizes these conflicts emerges, new SLD rules are generated that attempt to visually solve the cartographic conflicts. The new SLD rules can then be applied on-demand by a cartographic proxy server that rewrites the incoming GetMap requests to use the new SLD rules. The process for improving the WMS cartographic output has several stages, grouped into preparatory steps (basic automatic generalization methods, rough scale-dependent SLD symbolization) and real-time processing steps (detection of cartographic conflicts, conflicts solution and generation of new SLD rules). The entire process of detecting and solving cartographic conflicts in the maps produced by WMS through the use of overriding SLD rules is described in detail. Furthermore, it is conceivable to transform the conflicting features into spatial objects containing methods for discovering appropriate SLD values that minimize conflicts. Such approaches can bring the performance of automatic detection and correction of cartographic conflicts above the threshold required for interactive visualization, thus, making the process of dynamically solving cartographic conflicts in WMS servers a viable solution. Numéro de notice : A2015-762 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/00087041.2015.1119468 En ligne : http://dx.doi.org/10.1080/00087041.2015.1119468 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78800
in Cartographic journal (the) > Vol 52 n° 2 (May 2015) . - pp 125 - 136[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-2015021 RAB Revue Centre de documentation En réserve L003 Disponible Adaptive generation of variable-scale network maps for small displays based on line density distribution / Zhilin Li in Geoinformatica, vol 19 n° 2 (April - June 2015)
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Titre : Adaptive generation of variable-scale network maps for small displays based on line density distribution Type de document : Article/Communication Auteurs : Zhilin Li, Auteur ; Peng Ti, Auteur Année de publication : 2015 Article en page(s) : pp 277 - 295 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] analyse de données
[Termes IGN] carte thématique
[Termes IGN] densité
[Termes IGN] échelle des données
[Termes IGN] échelle variable
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] lisibilité perceptive
[Termes IGN] petit écranRésumé : (auteur) This paper presents an integrated strategy for adaptive generation of variable-scale network maps for different small displays. It is based on the line density distribution and comprised of three steps, i.e. (a) to estimate the line density by a grid-based method, (b) to adaptively generate variable-scale maps based on density distribution for given display sizes and (c) to improve the map readability by map generalization. The proposed strategy has been tested by using two real-life network datasets, with a statistical analysis and a perceptual evaluation. Experimental results show that this strategy is able to better exploit the limited map space so as to significantly improve map clarity and readability and at the same time to preserve map recognition ability compared to its original shape. Numéro de notice : A2015-489 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-014-0212-8 Date de publication en ligne : 03/06/2014 En ligne : https://doi.org/10.1007/s10707-014-0212-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77282
in Geoinformatica > vol 19 n° 2 (April - June 2015) . - pp 277 - 295[article]An experimental approach for selection/elimination in stream network generalization using support vector machines / Alper Sen in Geocarto international, vol 30 n° 3 - 4 (March - April 2015)
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Titre : An experimental approach for selection/elimination in stream network generalization using support vector machines Type de document : Article/Communication Auteurs : Alper Sen, Auteur ; Turkay Gokgoz, Auteur Année de publication : 2015 Article en page(s) : pp 311 - 329 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] apprentissage automatique
[Termes IGN] base de données multi-représentation
[Termes IGN] classification par séparateurs à vaste marge
[Termes IGN] généralisation cartographique automatisée
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Multi-representation databases (MRDB) are used in several Geographical Information System applications for different purposes. MRDB are mainly obtained through model and cartographic generalizations. The model generalization is essentially achieved with the selection/elimination process in which a decision must be made to include or exclude the object at the target level. In this study, support vector machines (SVM) was, for the first time, used for the selection/elimination process in stream network generalization. Within this context, the attributes to be used as input data in the SVM method were determined and weighted according to the associations determined in a chi-squared independence test. 1:100,000-scale (medium resolution) stream networks were derived from two 1:24,000-scale (high resolution) stream networks with different patterns in the United States Geological Survey National Hydrography Data-sets. The derived stream networks were quite similar to the 1:100,000-scale original stream networks in both qualitative and visual aspects. Numéro de notice : A2015-249 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2014.937466 Date de publication en ligne : 25/07/2014 En ligne : https://doi.org/10.1080/10106049.2014.937466 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76247
in Geocarto international > vol 30 n° 3 - 4 (March - April 2015) . - pp 311 - 329[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 059-2015021 RAB Revue Centre de documentation En réserve L003 Disponible Object selection in map generalization using geosocial network data: A case study in Wuhan, China / Hao Luo in Geomatica, vol 69 n° 1 (March 2015)PermalinkWeighted straight skeletons in the plane / Therese Biedl in Computational Geometry : theory and applications, vol 48 n° 2 (February 2015)PermalinkAdding intermediate representations in a multi-scale map to enable a smooth zooming / Marion Dumont (2015)PermalinkPermalinkPermalinkPermalinkPermalinkThe fractal nature of maps and mapping / Bin Jiang in International journal of geographical information science IJGIS, vol 29 n° 1 (January 2015)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])PermalinkRoad network selection for medium scales using an extended stroke-mesh combination algorithm / Stefan A. Benz in Cartography and Geographic Information Science, vol 41 n° 4 (September 2014)Permalink