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Developing a conceptual framework for visually-enabled geocollaboration / Alan M. MacEachren in International journal of geographical information science IJGIS, vol 18 n° 1 (january - february 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 1 (january - february 2004) . - pp 1 - 34 Titre : Developing a conceptual framework for visually-enabled geocollaboration Type de document : Article/Communication Auteurs : Alan M. MacEachren, Auteur ; Isaac Brewer, Auteur Année de publication : 2004 Article en page(s) : pp 1 - 34 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] approche participative [Termes IGN] données localisées [Termes IGN] information géographique [Termes IGN] outil d'aide à la décision [Termes IGN] représentation mentale [Termes IGN] utilisateur [Termes IGN] visualisation Résumé : (Auteur) Most work with geospatial data, whether for scientific analysis, urban and environmental planning, or business decision making is carried out by groups. In contrast, geographic information technologies have been built and assessed only for use by individuals. In this paper we argue that, to support collaboration with geospatial information, specific attention must be given to tools that mediate understanding and support negotiation among participants. In addition, we contend that visual representations have a particularly important role to play as mediators of geocollaborative activities. With these contentions as a starting point, we present a framework for study of visually-enabled collaboration with geospatial information and for development, implementation, and assessment of geoinformation technologies that support that collaboration. The paper concludes with a brief description of two prototype geocollaborative environments that illustrate the use of the framework developed and provide the basis for discussing goals for futher research. Numéro de notice : A2004-030 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001596094 En ligne : https://doi.org/10.1080/13658810310001596094 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26558 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-04011	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-04012	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Spatial simulation for translating from land use to land cover / Daniel G. Brown in International journal of geographical information science IJGIS, vol 18 n° 1 (january - february 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 1 (january - february 2004) . - pp 35 - 60 Titre : Spatial simulation for translating from land use to land cover Type de document : Article/Communication Auteurs : Daniel G. Brown, Auteur ; J.D. Duh, Auteur Année de publication : 2004 Article en page(s) : pp 35 - 60 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] carte d'occupation du sol [Termes IGN] conversion de données [Termes IGN] écologie [Termes IGN] étude d'impact [Termes IGN] Michigan (Etats-Unis) [Termes IGN] modèle stochastique [Termes IGN] occupation du sol [Termes IGN] prédiction [Termes IGN] simulation d'image [Termes IGN] utilisation du sol Résumé : (Auteur) An approach to simulating land-cover patterns based on historical landuse maps and forecasts based on models and planning documents is described and demonstrated. The approach uses stochastic spatial simulation to generate land-cover patterns on the basis of a land-use map and stated translation rules. The translation rules take the form of (1) a table that summarizes the proportions of each land-cover type within each land-use type and (2) a description of the spatial arrangement and/or pattern of land-cover types. In a demonstration of the approach, we calibrated the translation rules using aerial photo observations and simulated current and future land-cover maps for Livingston County, Michigan, USA. We tested the approach in a test area that was not used in calibrating the translation. The proportions of land cover within each land-use type were reasonably well estimated, except where the amount of the same land use was small in the calibration site. The use of location rules significantly improved the fit of estimated land-cover patterns with observed patterns for the test area. The paper discusses how the method can be used to bridge land-use scenarios and their ecological impacts based on landcover patterns. Numéro de notice : A2004-031 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001620906 En ligne : https://doi.org/10.1080/13658810310001620906 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26559 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-04011	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-04012	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Geocoding crime and a first estimate of a minimum acceptable hit rate / J.H. Ratcliffe in International journal of geographical information science IJGIS, vol 18 n° 1 (january - february 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 1 (january - february 2004) . - pp 61 - 72 Titre : Geocoding crime and a first estimate of a minimum acceptable hit rate Type de document : Article/Communication Auteurs : J.H. Ratcliffe, Auteur Année de publication : 2004 Article en page(s) : pp 61 - 72 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] données statistiques [Termes IGN] géocodage [Termes IGN] géopositionnement [Termes IGN] infraction [Termes IGN] méthode de Monte-Carlo [Termes IGN] outil d'aide à la décision [Termes IGN] système d'information géographique Résumé : (Auteur) Spatial crime analysis relies not only on accurate geocoding but also the achievement of a high level of geocoding success. Geocoding is the task of converting locations, such as the addresses of burglary victims, into grid coordinates and is a task performed regularly by many crime analysts. Data sources include police offence and incident databases where the quality of geographical references can vary. The reality of dealing with this real world data means that achieving a completely successful geocoding process is rare and few crime analysts can get a hit rate (the percentage measure of success) of 100%. This paper seeks the answer to a seemingly simple question: what is an 'acceptable' minimum geocoding hit rate for crime data? This paper uses a number of different crime patterns and Monte Carlo simulation to replicate a declining geocoding hit rate to answer this question. Reduced crime rates of mapped points, aggregated to census boundaries, are compared for a statistically significant difference. The result indicates 85% as a first estimate of a minimum reliable geocoding rate, and this result is applicable to many address-based, point pattern datasets beyond the crime arena. Numéro de notice : A2004-032 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810310001596076 En ligne : https://doi.org/10.1080/13658810310001596076 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26560 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-04011	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-04012	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Integration of linear programming and a watershed-scale hydrologic model for proposing an optimized land-use and assessing its impact on soil conservation: a case study of the Nagwan watershed in the Hazaribagh district of Jharkhand, India / R. Kaur in International journal of geographical information science IJGIS, vol 18 n° 1 (january - february 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 1 (january - february 2004) . - pp 73 - 98 Titre : Integration of linear programming and a watershed-scale hydrologic model for proposing an optimized land-use and assessing its impact on soil conservation: a case study of the Nagwan watershed in the Hazaribagh district of Jharkhand, India Type de document : Article/Communication Auteurs : R. Kaur, Auteur ; R. Srivasta, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 73 - 98 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] agriculture [Termes IGN] aide à la décision [Termes IGN] bassin hydrographique [Termes IGN] érosion hydrique [Termes IGN] étude d'impact [Termes IGN] Inde [Termes IGN] maïs (céréale) [Termes IGN] modèle hydrographique [Termes IGN] outil d'aide à la décision [Termes IGN] programmation linéaire [Termes IGN] sédimentologie [Termes IGN] utilisation du sol Résumé : (Auteur) The present investigation was an attempt to develop a Spatial Decision Support System (SDSS) for a test Nagwan watershed situated in the Damodar Barakar catchment in India, the second most seriously eroded area in the world, for not only estimating sediment yields under prevailing resource management systems but also designing a linear programming (LP)based- optimized land-use plan for soil loss reduction in the test watershed. The proposed SDSS was validated on 9 years (1981-1983, 1985-1989, and 1991) of sediment yield data for the test watershed. This showed that the SDSS could mimic the annual dynamics of the total sediment yields at the test watershed outlet with a correlation coefficient of 0.65, model efficiency coefficient of 0.70, mean relative error of 17.97%, and root mean square prediction error of 9.63t ha-1. It could also be used as an efficient tool for assessing sediment yields from different parts of the test watershed and for designing a linear programming (LP)-based optimized land-use plan for reduced total sediment yields from the test watershed. The LP-based land-use plan proposed no change in the total areas under paddy, corn and forest land-use types but suggested their re-distribution within the test watershed's total sediment yield by about 14.61% but also an increase in its paddy and corn crop productivities by 2.80 and 68.14%, respectively. The proposed LP-based land-use plan for the test watershed could thus lead to an enhanced productivity benefit of about Rs 3735ha-1, in monetary terms, from corn crop cultivation at its optimal locations. Numéro de notice : A2004-033 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810310001620915 En ligne : https://doi.org/10.1080/13658810310001620915 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26561 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-04011	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-04012	RAB	Revue	Centre de documentation	En réserve L003	Disponible