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Auteur J. Chen |
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Combining usability techniques to design geovisualization tools for epidemiology / Antony C. Robinson in Cartography and Geographic Information Science, vol 32 n° 4 (October 2005)
[article]
Titre : Combining usability techniques to design geovisualization tools for epidemiology Type de document : Article/Communication Auteurs : Antony C. Robinson, Auteur ; J. Chen, Auteur ; E.J. Lengerich, Auteur ; H.G. Meyer, Auteur ; Alan M. MacEachren, Auteur Année de publication : 2005 Article en page(s) : pp 243 - 255 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] analyse spatio-temporelle
[Termes IGN] épidémie
[Termes IGN] exploration de données géographiques
[Termes IGN] logiciel de visualisation
[Termes IGN] outil d'aide à la décision
[Termes IGN] visualisation de donnéesRésumé : (Auteur) Designing usable geovisualization tools is an emerging problem in GIScience software development. We are often satisfied that a new method provides an innovative window on our data, but functionality alone is insufficient assurance that a tool is applicable to a problem in situ. As extensions of the static methods they evolved from, geovisualization tools are bound to enable new knowledge creation. We have yet to learn how to adapt techniques from interaction designers and usability experts toward our tools in order to maximize this ability. This is especially challenging because there is limited existing guidance for the design of usable geovisualization tools. Their design requires knowledge about the context of work within which they will be used, and should involve user input at all stages, as is the practice in any human-centered design effort. Toward that goal, we have employed a wide range of techniques in the design of ESTAT, an exploratory geovisualization toolkit for epidemiology. These techniques include : verbal protocol analysis, card-sorting, focus groups, and an in-depth case study. This paper reports the design process and evaluation results from our experience with the ESTAT toolkit. Numéro de notice : A2005-530 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1559/152304005775194700 En ligne : https://doi.org/10.1559/152304005775194700 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27666
in Cartography and Geographic Information Science > vol 32 n° 4 (October 2005) . - pp 243 - 255[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 032-05041 RAB Revue Centre de documentation En réserve L003 Disponible Automated building generalization based on urban morphology and gestalt theory / Z. Li in International journal of geographical information science IJGIS, vol 18 n° 5 (august 2004)
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Titre : Automated building generalization based on urban morphology and gestalt theory Type de document : Article/Communication Auteurs : Z. Li, Auteur ; Hongxiang Yan, Auteur ; Tinghua Ai, Auteur ; J. Chen, Auteur Année de publication : 2004 Article en page(s) : pp 513 - 534 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse spatiale
[Termes IGN] base de données cartographiques
[Termes IGN] diagramme de Voronoï
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] généralisation du bâti
[Termes IGN] morphologie mathématique
[Termes IGN] reconnaissance de formes
[Termes IGN] système d'information géographique
[Termes IGN] théorie des graphes
[Termes IGN] triangulation de Delaunay
[Termes IGN] zone urbaine
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) Building generalization is a difficult operation due to the complexity of the spatial distribution of buildings and for reasons of spatial recognition. In this study, building generalization is decomposed into two steps, i.e. building grouping and generalization execution. The neighbourhood model in urban morphology provides global constraints for guiding the global partitioning of building sets on the whole map by means of roads and rivers, by which enclaves, blocks, superblocks or neighbourhoods are formed, whereas the local constraints from Gestalt principles provide criteria for the further grouping of enclaves, blocks, superblocks and/or neighbourhoods. In the grouping process, graph theory, Delaunay triangulation and the Voronoi diagram are employed as supporting techniques. After grouping, some useful information, such as the sum of the building's area, the mean separation and the standard deviation of the separation of buildings, is attached to each group. By means of the attached information, an appropriate operation is selected to generalize the corresponding groups. Indeed, the methodology described brings together a number of welldeveloped theories/techniques, including graph theory, Delaunay triangulation, the Voronoi diagram, urban morphology and Gestalt theory, in such a way that multiscale products can be derived. Numéro de notice : A2004-285 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810410001702021 En ligne : https://doi.org/10.1080/13658810410001702021 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26812
in International journal of geographical information science IJGIS > vol 18 n° 5 (august 2004) . - pp 513 - 534[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-04051 RAB Revue Centre de documentation En réserve L003 Disponible A comparison of BRDF models for the normalization of satellite optical data to a standard sun-target-sensor geometry / R. Latifovic in IEEE Transactions on geoscience and remote sensing, vol 41 n° 8 (August 2003)
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Titre : A comparison of BRDF models for the normalization of satellite optical data to a standard sun-target-sensor geometry Type de document : Article/Communication Auteurs : R. Latifovic, Auteur ; J. Cihlar, Auteur ; J. Chen, Auteur Année de publication : 2003 Article en page(s) : pp 1889 - 1898 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] analyse comparative
[Termes IGN] changement climatique
[Termes IGN] distribution du coefficient de réflexion bidirectionnelle BRDF
[Termes IGN] éclairement lumineux
[Termes IGN] image NOAA-AVHRR
[Termes IGN] image optique
[Termes IGN] image SPOT-Végétation
[Termes IGN] rayonnement solaire
[Termes IGN] réflectance de surface
[Termes IGN] tâche claireRésumé : (Auteur) Climate change studies require consistent, long time series, surface reflectance data. The characterization of the bidirectional reflectance distribution function (BRDF) is important for normalizing the solar radiation reflected from the earth's surface. We evaluated four BRDF models to identify the preferred approach to the normalization of multiyear National Oceanic and Atmospheric Administration Advanced Very High Resolution Radiometer (AVHRR) and SPOT4VEGETATION (VGT) composite images to a common illumination and viewing geometry. Four models by the following authors were included: Walthall, Ropjean, Ross-Li, and a new nonlinear temporal angular model (NTAM). NTAM accounts for hotspot effects and also responds to seasonal changes in land cover properties (using vegetation indexes as surrogate temporal measures). We compared the performance of the models under different scenarios of coefficient derivation and model application including model ability to reproduce theoretical BRDF curves, model consistency in single, multiyear, and incomplete sampling schemes, and comparison of AVMR and LANDSAT Thematic Mapper surface reflectance prior and after BRDF normalization. We found that in all the tests, NTAM yielded the best fits between the observed and estimated values. NTAM requires eight coefficients and a lengthier iterative procedure to derive the coefficients, but the resulting coefficients are applied to the entire growing season rather than one temporal window. NTAM also performed well for different sensors (AVHRR, VGT) and geographic areas (Canada, east Asia, southern United States). Our results contradict the often-encountered perception that semiempirical BRDF models for angular normalization are all similarly effective, and the research on this topic is mature. We also describe a procedure for routine normalization of satellite optical data. For northern ecosystems, the NTAM coefficients derived from AVHRR and VGT data for Canada are available via ftp://Ccrs.nrcan.gc.ca. Numéro de notice : A2003-280 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2003.811557 En ligne : https://doi.org/10.1109/TGRS.2003.811557 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22575
in IEEE Transactions on geoscience and remote sensing > vol 41 n° 8 (August 2003) . - pp 1889 - 1898[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-03081 RAB Revue Centre de documentation En réserve L003 Disponible Assessment of the urban development plan of Beijing by using a CA-based urban growth model / J. Chen in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 10 (October 2002)
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Titre : Assessment of the urban development plan of Beijing by using a CA-based urban growth model Type de document : Article/Communication Auteurs : J. Chen, Auteur ; P. Gong, Auteur ; C. He, Auteur ; W. Luo, Auteur ; M. Tamura, Auteur ; P. Shi, Auteur Année de publication : 2002 Article en page(s) : pp 1063 - 1071 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique
[Termes IGN] automate cellulaire
[Termes IGN] croissance urbaine
[Termes IGN] modèle mathématique
[Termes IGN] Pékin (Chine)Résumé : (Auteur) We developed a CA-based urban growth simulation model to emulate the city growth before 1997 and simulate possible change scenarios after that. An adaptive Monte-Carlo method was used to automate the calibration of factor weights used in the CA transitional rules. We used one scene of Landsat MSS imagery from 1975 and three scenes of TM imageiy from 1984, 1991, and 1997 to classify the land-use patterns, and we used the results to calibrate the CA model. We applied the model to assess the general urban development plan entitled "disperse polycentric urban development plan" of Beijing City and found that the plan failed to meet its objectives. Numéro de notice : A2002-235 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans En ligne : https://www.asprs.org/wp-content/uploads/pers/2002journal/october/2002_oct_1063- [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22149
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 10 (October 2002) . - pp 1063 - 1071[article]Development of geographic information systems (GIS) in China: an overview / J. Chen in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 4 (April 2002)
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Titre : Development of geographic information systems (GIS) in China: an overview Type de document : Article/Communication Auteurs : J. Chen, Auteur ; J. Li, Auteur ; Jianhua He, Auteur ; Z. Li, Auteur Année de publication : 2002 Article en page(s) : pp 325 - 332 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes IGN] Chine
[Termes IGN] système d'information géographiqueRésumé : (Auteur) Geographic information systems (GIS) were introduced into China (Mainland) in the 1970s. This paper provides an overview of the advances in GIS in Mainland China (not including Taiwan, Hong Kong, and Macau) during the post more than 20 years. It covers the developments of operational application systems, national geospatial databases, and technical systems. It also reviews the advances in research, education, and institutional development. Numéro de notice : A2002-065 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : sans En ligne : http://www.lsgi.polyu.edu.hk/staff/ZL.Li/papers_pdf/photogrammetric_eng_Rem_sen/ [...] Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21981
in Photogrammetric Engineering & Remote Sensing, PERS > vol 68 n° 4 (April 2002) . - pp 325 - 332[article]A GIS based computer supported collaborative work CSCW system for urban planning and land management / J. Jiang in Photogrammetric Engineering & Remote Sensing, PERS, vol 68 n° 4 (April 2002)Permalink