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Real-time visualization in operational hydrology through web-based cartography / C. Lienert in Cartography and Geographic Information Science, vol 36 n° 1 (January 2009)  

Public [article]  inCartography and Geographic Information Science > vol 36 n° 1 (January 2009) . - pp 45 - 58 Titre : Real-time visualization in operational hydrology through web-based cartography Type de document : Article/Communication Auteurs : C. Lienert, Auteur ; R. Weingartner, Auteur ; Lorenz Hurni, Auteur Année de publication : 2009 Article en page(s) : pp 45 - 58 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] acquisition de données [Termes IGN] cartographie par internet [Termes IGN] géomatique web [Termes IGN] inondation [Termes IGN] risque naturel [Termes IGN] surveillance hydrologique [Termes IGN] temps réel [Termes IGN] traitement de données localisées [Termes IGN] visualisation de données Résumé : (Auteur) Early warning and monitoring activities in the field of natural hazard management are crucial in order to limit damage to life and property from extreme natural events. Decision makers in these fields, such as operational hydrologists, must be enabled to quickly and comprehensively assess an on-going situation, examine its details, and then take further actions based on the most current information available. The cartographic challenge is to deliver automated, real-time visualizations from distributed raw measurement data while applying sound cartographic rules and standards. In this research, a web-based, cartographic, real-time information system is presented. True real-time data of Swiss hydro-meteorological measuring networks were used, and a prototype application was tested that integrates the acquisition, processing, and visualizations in different ways, depending on the chosen timeframe and level of detail. Besides monitoring visualizations, data are retraceable using visualizations that clearly stress the course of a hydrological event and the data's spatio-temporal character. Further visualizations and functionalities are provided that allow for relating real-time data to a broader historical context, facilitating learning from former experiences. Data for past events are immediately retrievable from a data archive, then classified and visualized for comparisons. Numéro de notice : A2009-040 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304009787340188 En ligne : https://doi.org/10.1559/152304009787340188 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29670 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-09011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

An automated method of scale selection and sheet configuration for multiple sheet census maps with Insets / W.G. Thompson in Cartography and Geographic Information Science, vol 36 n° 1 (January 2009)  

Public [article]  inCartography and Geographic Information Science > vol 36 n° 1 (January 2009) . - pp 59 - 70 Titre : An automated method of scale selection and sheet configuration for multiple sheet census maps with Insets Type de document : Article/Communication Auteurs : W.G. Thompson, Auteur Année de publication : 2009 Article en page(s) : pp 59 - 70 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie thématique [Termes IGN] analyse de groupement [Termes IGN] cartographie automatique [Termes IGN] carton (carte) [Termes IGN] densité de population [Termes IGN] échelle cartographique [Termes IGN] mise à l'échelle Résumé : (Auteur) In order to create a useful map, the cartographer must select a scale at which the map reader can distinguish features shown on the map and read their labels. However, the choice of scale for a paper map is also constrained by the size of the map sheet and by the cost of working with a large number of sheets. When the feature density pattern allows, space can be conserved by making the map at more than one scale: a small scale suitable for most of the map, while dense features are shown on inset maps at larger scales. Creating inset maps requires the cartographer to make a series of complex, interrelated decisions regarding the most effective overall sheet configuration, which is dependent upon the scale chosen for the main map and how the inset maps are created. The Census Automated Map Production System (CAMPS) applies cartographic logic and density analysis to make these decisions in a fully automated mapping environment. Copyright CaGISociety Numéro de notice : A2009-041 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1559/152304009787340214 En ligne : https://doi.org/10.1559/152304009787340214 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29671 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-09011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Extracting composite cartographic area features in low-quality maps / S. Leyk in Cartography and Geographic Information Science, vol 36 n° 1 (January 2009)  

Public [article]  inCartography and Geographic Information Science > vol 36 n° 1 (January 2009) . - pp 71 - 79 Titre : Extracting composite cartographic area features in low-quality maps Type de document : Article/Communication Auteurs : S. Leyk, Auteur ; R. Boesch, Auteur Année de publication : 2009 Article en page(s) : pp 71 - 79 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] attribut géomètrique [Termes IGN] carte ancienne [Termes IGN] carte topographique [Termes IGN] extraction automatique [Termes IGN] extraction de traits caractéristiques [Termes IGN] forêt [Termes IGN] méthode robuste [Termes IGN] objet géographique zonal [Termes IGN] signe conventionnel Résumé : (Auteur) We describe an extraction method for area features defined by composite cartographic elements and derived from historical, manually produced maps of low graphical quality. Composite elements appear in many topographic maps of the 19th and 20th century which provide unique information about the landscape of the past. We develop a method from prior research for extracting forest areas from the historic Siegfried Map, on which they are represented by sets of circular forest symbols within boundary regions. First, a prototype search identifies forest symbols characterized by a combination of geometric attributes of connected components, shape descriptions of the local neighborhood, and patterns formed by similar graphic elements. Next, the complete set of forest symbols is iteratively determined by testing forest symbol candidates in the vicinity of the prototypes if they belong to a group of sufficient other candidates. Finally, spatial expansion determines the forest net area described by the composition of recognized forest symbols and continues to fill gaps between forest areas and their boundaries, as well as larger objects within the forest area. Automated extraction from three map pages resulted in an accuracy of K = 95 percent, which indicates high robustness for automated processing of entire map series. The new approach presented in this paper represents a general methodological framework for the extraction of area features from composite map elements in low-quality maps. Copyright CaGISociety Numéro de notice : A2009-042 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.1559/152304009787340115 En ligne : https://doi.org/10.1559/152304009787340115 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29672 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
032-09011	RAB	Revue	Centre de documentation	En réserve L003	Disponible