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Estimating the vehicle-miles-traveled implications of alternative metropolitan growth scenarios: A Boston example / Joseph Ferreira Jr in Transactions in GIS, vol 17 n° 5 (October 2013)  

Public [article]  inTransactions in GIS > vol 17 n° 5 (October 2013) . - pp 645 - 660 Titre : Estimating the vehicle-miles-traveled implications of alternative metropolitan growth scenarios: A Boston example Type de document : Article/Communication Auteurs : Joseph Ferreira Jr, Auteur ; Mi Diao, Auteur ; Jingsi Xu, Auteur Année de publication : 2013 Article en page(s) : pp 645 - 660 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes IGN] analyse spatiale [Termes IGN] Boston (Massachusetts) [Termes IGN] comportement [Termes IGN] croissance urbaine [Termes IGN] effet de serre [Termes IGN] gaz [Termes IGN] grille d'échantillonnage [Termes IGN] métropole [Termes IGN] migration pendulaire [Termes IGN] odomètre [Termes IGN] pollution atmosphérique Résumé : (Auteur) This study demonstrates the potential value, and difficulties, in utilizing large-scale, location aware, administrative data together with urban modeling to address current policy issues in a timely fashion. We take advantage of a unique dataset of millions of odometer readings from annual safety inspections of all private passenger vehicles in Metropolitan Boston to estimate the vehicle-miles-traveled (VMT) implication of alternative metropolitan growth scenarios: a sprawl-type “let-it-be” scenario and a smart-growth-type “winds-of-change” scenario. The data are georeferenced to 250 x 250 m grid cells developed by MassGIS. We apply a greedy algorithm to assign Traffic Analysis Zone (TAZ) level household growth projections to grid cells and then use spatial interpolation tools to estimate VMT-per-vehicle surfaces for the region. If new growth households have similar VMT behavior as their neighbors, then the let-it-be scenario will generate 12–15% more VMT per household compared to the winds-of-change scenario. However, even the “wind-of-change” scenario, will result in new households averaging higher VMT per household than the Metro Boston average observed in 2005. The implication is that urban growth management can significantly reduce GHG but, by itself, will not be sufficient to achieve the GHG emission reduction targets set by the State for the transportation sector. Numéro de notice : A2013-575 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/URBANISME Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12017 Date de publication en ligne : 10/05/2013 En ligne : https://doi.org/10.1111/tgis.12017 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32711 [article]

A generic data model for moving objects / Jingsi Xu in Geoinformatica, vol 17 n° 1 (January 2013)  

Public [article]  inGeoinformatica > vol 17 n° 1 (January 2013) . - pp 125 - 172 Titre : A generic data model for moving objects Type de document : Article/Communication Auteurs : Jingsi Xu, Auteur ; Ralf Hartmut Güting, Auteur Année de publication : 2013 Article en page(s) : pp 125 - 172 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] environnement géographique virtuel [Termes IGN] modèle conceptuel de données localisées [Termes IGN] objet mobile [Termes IGN] réseau de transport [Termes IGN] transport intermodal Résumé : (Auteur) Moving objects databases should be able to manage trips that pass through several real world environments, e.g., road network, indoor. However, the current data models only deal with the movement in one situation and cannot represent comprehensive trips for humans who can move inside a building, walk on the pavement, drive on the road, take the public vehicles (bus or train), etc. As a result, existing queries are solely limited to one environment. In this paper, we design a data model that is able to represent moving objects in multiple environments in order to support novel queries on trips in different surroundings and various transportation modes (e.g., Car, Walk, Bus). A generic and precise location representation is proposed that can apply in all environments. The idea is to let the space for moving objects be covered by a set of so-called infrastructures each of which corresponds to an environment and defines the available places for moving objects. Then, the location is represented by referencing to the infrastructure. We formulate the concept of space and infrastructure and propose the methodology to represent moving objects in different environments with the integration of precise transportation modes. Due to different infrastructure characteristics, a set of novel data types is defined to represent infrastructure components. To efficiently support new queries, we design a group of operators to access the data. We present how such a data model is implemented in a database system and report the experimental results. The new model is designed with attention to the data models of previous work for free space and road networks to have a consistent type system and framework of operators. In this way, a powerful set of generic query operations is available for querying, together with those dealing with infrastructures and transportation modes. We demonstrate these capabilities by formulating a set of sophisticated queries across all infrastructures. Numéro de notice : A2013-049 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1007/s10707-012-0158-7 En ligne : https://doi.org/10.1007/s10707-012-0158-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32187 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
057-2013011	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Formalizing natural-language spatial relations between linear objects with topological and metric properties / Jingsi Xu 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 377 - 395 Titre : Formalizing natural-language spatial relations between linear objects with topological and metric properties Type de document : Article/Communication Auteurs : Jingsi Xu, Auteur Année de publication : 2007 Article en page(s) : pp 377 - 395 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] ArcGIS [Termes IGN] caractérisation [Termes IGN] espace métrique [Termes IGN] espace topologique [Termes IGN] formalisation [Termes IGN] interface utilisateur [Termes IGN] langage naturel (informatique) [Termes IGN] objet géographique linéaire [Termes IGN] relation topologique [Termes IGN] requête spatiale Résumé : (Auteur) People usually use qualitative terms to express spatial relations, while current geographic information systems (GISs) all use quantitative approaches to store spatial information. The abilities of current GISs to represent and query spatial information about geographic space are limited. Based on the result of a human-subject test of natural-language descriptions of spatial relations between linear geographic objects, this paper defines a series of quantitative indices that are related to natural-language spatial relation terms, and uses these indices to formalize the ambiguous natural-language representation with a decision-tree algorithm. The result indicates that using both topological indices and metric indices can formalize the natural-language spatial predicates better than using only topological indices. The rules extracted from the trees are used to characterize the spatial relations into qualitative description groups. Using these rules, a prototype of an intelligent natural-language interface for the ESRI software ArcGIS that can query spatial relations between two linear objects in natural English language is implemented using SNePS (the Semantic Network Processing System). Copyright Taylor & Francis Numéro de notice : A2007-117 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810600894323 En ligne : https://doi.org/10.1080/13658810600894323 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28480 [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