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Street-level spatial interpolation using network-based IDW and ordinary kriging / N. Shiode in Transactions in GIS, vol 15 n° 4 (August 2011)
[article]
Titre : Street-level spatial interpolation using network-based IDW and ordinary kriging Type de document : Article/Communication Auteurs : N. Shiode, Auteur ; S. Shiode, Auteur Année de publication : 2011 Article en page(s) : pp 457 - 477 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] interpolation inversement proportionnelle à la distance
[Termes IGN] interpolation spatiale
[Termes IGN] krigeage
[Termes IGN] lissage de données
[Termes IGN] réseau routierRésumé : (Auteur) This study proposes network-based spatial interpolation methods to help predict unknown spatial values along networks more accurately. It expands on two of the commonly used spatial interpolation methods, IDW (inverse distance weighting) and OK (ordinary kriging), and applies them to analyze spatial data observed on a network. The study first provides the methodological framework, and it then examines the validity of the proposed methods by cross-validating elevations from two contrasting patterns of street network and comparing the MSEs (Mean Squared Errors) of the predicted values measured with the two proposed network-based methods and their conventional counterparts. The study suggests that both network-based IDW and network-based OK are generally more accurate than their existing counterparts, with network-based OK constantly outperforming the other methods. The network-based methods also turn out to be more sensitive to the edge effect, and their performance improves after edge correction. Furthermore, the MSEs of standard OK and network-based OK improve as more sample locations are used, whereas those of standard IDW and network-based IDW remain stable regardless of the number of sample locations. The two network-based methods use a similar set of sample locations, and their performance is inherently affected by the difference in their weight distribution among sample locations. Numéro de notice : A2011-346 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2011.01278.x Date de publication en ligne : 16/08/2011 En ligne : https://doi.org/10.1111/j.1467-9671.2011.01278.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31125
in Transactions in GIS > vol 15 n° 4 (August 2011) . - pp 457 - 477[article]All in a year's work / C. Dylan in Geoinformatics, vol 14 n° 5 (01/07/2011)
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Titre : All in a year's work Type de document : Article/Communication Auteurs : C. Dylan, Auteur Année de publication : 2011 Article en page(s) : pp 10 - 12 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie
[Termes IGN] Abou Dabi
[Termes IGN] circuit automobile
[Termes IGN] équipement sportif
[Termes IGN] nivellement par GPS
[Termes IGN] planéité
[Termes IGN] précision millimétrique
[Termes IGN] surveillance d'ouvrageRésumé : (Auteur) Bickhardt Bau is a 1600-person German firm based in Kirchheim that specializes in roadway and racetracks. They completed a word-class formula one circuit under tough conditions in Abu Dhabi in only one year. Since its completion, since then, the Yas Marina Circuit has become the home of the Abu Dhabi Grand Prix, held in November as the last race on the formula one calendar. This article explains how high precision and control was achieved in the project. Numéro de notice : A2011-322 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31101
in Geoinformatics > vol 14 n° 5 (01/07/2011) . - pp 10 - 12[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 262-2011051 SL Revue Centre de documentation Revues en salle Disponible Une cartographie de qualité pour la sécurité / Anne Fantuzzi in Géomètre, n° 2083 (juillet - aout 2011)
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Titre : Une cartographie de qualité pour la sécurité Type de document : Article/Communication Auteurs : Anne Fantuzzi, Auteur Année de publication : 2011 Article en page(s) : 2 p. ; pp 16 - 17 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] cartographie thématique
[Termes IGN] portail géofoncier
[Termes IGN] protection civile
[Termes IGN] réseau d'assainissement
[Termes IGN] réseau de distribution d'eau
[Termes IGN] réseau électrique
[Termes IGN] Teria
[Termes IGN] travaux publicsRésumé : (Auteur) Le portail Géofoncier et Teria, deux outils pour répondre aux nouvelles exigences en termes de travaux à proximité des réseaux. Numéro de notice : A2011-309 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31088
in Géomètre > n° 2083 (juillet - aout 2011) . - 2 p. ; pp 16 - 17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 063-2011071 RAB Revue Centre de documentation En réserve L003 Disponible Query-aware location anonymization for road networks / C. Chow in Geoinformatica, vol 15 n° 3 (July 2011)
[article]
Titre : Query-aware location anonymization for road networks Type de document : Article/Communication Auteurs : C. Chow, Auteur ; M. Mokbel, Auteur ; Jie Bao, Auteur ; X. Liu, Auteur Année de publication : 2011 Article en page(s) : pp 571 - 607 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] espace euclidien
[Termes IGN] requête spatiale
[Termes IGN] réseau routier
[Termes IGN] service fondé sur la positionRésumé : (Auteur) Recently, several techniques have been proposed to protect the user location privacy for location-based services in the Euclidean space. Applying these techniques directly to the road network environment would lead to privacy leakage and inefficient query processing. In this paper, we propose a new location anonymization algorithm that is designed specifically for the road network environment. Our algorithm relies on the commonly used concept of spatial cloaking, where a user location is cloaked into a set of connected road segments of a minimum total length L including at least K users. Our algorithm is “query-aware” as it takes into account the query execution cost at a database server and the query quality, i.e., the number of objects returned to users by the database server, during the location anonymization process. In particular, we develop a new cost function that balances between the query execution cost and the query quality. Then, we introduce two versions of our algorithm, namely, pure greedy and randomized greedy, that aim to minimize the developed cost function and satisfy the user specified privacy requirements. To accommodate intervals with a high workload, we introduce a shared execution paradigm that boosts the scalability of our location anonymization algorithm and the database server to support large numbers of queries received in a short time period. Extensive experimental results show that our algorithms are more efficient and scalable than the state-of-the-art technique, in terms of both query execution cost and query quality. The results also show that our algorithms have very strong resilience to two privacy attacks, namely, the replay attack and the center-of-cloaked-area attack. Numéro de notice : A2011-212 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-010-0117-0 Date de publication en ligne : 06/11/2010 En ligne : https://doi.org/10.1007/s10707-010-0117-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30990
in Geoinformatica > vol 15 n° 3 (July 2011) . - pp 571 - 607[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2011031 RAB Revue Centre de documentation En réserve L003 Disponible The partial sequenced route query with traveling rules in road networks / H. Chen in Geoinformatica, vol 15 n° 3 (July 2011)
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Titre : The partial sequenced route query with traveling rules in road networks Type de document : Article/Communication Auteurs : H. Chen, Auteur ; W. Ku, Auteur ; M. Sun, Auteur ; R. Zimmermann, Auteur Année de publication : 2011 Article en page(s) : pp 541 - 569 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] calcul d'itinéraire
[Termes IGN] itinéraire
[Termes IGN] point d'intérêt
[Termes IGN] requête spatiale
[Termes IGN] réseau routier
[Termes IGN] service fondé sur la positionRésumé : (Auteur) In modern geographic information systems, route search represents an important class of queries. In route search related applications, users may want to define a number of traveling rules (traveling preferences) when they plan their trips. However, these traveling rules are not considered in most existing techniques. In this paper, we propose a novel spatial query type, the multi-rule partial sequenced route (MRPSR) query, which enables efficient trip planning with user defined traveling rules. The MRPSR query provides a unified framework that subsumes the well-known trip planning query (TPQ) and the optimal sequenced route (OSR) query. The difficulty in answering MRPSR queries lies in how to integrate multiple choices of points-of-interest (POI) with traveling rules when searching for satisfying routes. We prove that MRPSR query is NP-hard and then provide three algorithms by mapping traveling rules to an activity on vertex network. Afterwards, we extend all the proposed algorithms to road networks. By utilizing both real and synthetic POI datasets, we investigate the performance of our algorithms. The results of extensive simulations show that our algorithms are able to answer MRPSR queries effectively and efficiently with underlying road networks. Compared to the Light Optimal Route Discoverer (LORD) based brute-force solution, the response time of our algorithms is significantly reduced while the distances of the computed routes are only slightly longer than the shortest route. Numéro de notice : A2011-211 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-010-0115-2 Date de publication en ligne : 03/09/2010 En ligne : https://doi.org/10.1007/s10707-010-0115-2 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30989
in Geoinformatica > vol 15 n° 3 (July 2011) . - pp 541 - 569[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2011031 RAB Revue Centre de documentation En réserve L003 Disponible When 3D pulls into the station... / C. Morton in GEO: Geoconnexion international, vol 10 n° 7 (July – august 2011)PermalinkEngineering surveying for the construction of railway tunnels in Hong Kong / S. Lam in Geomatica, vol 65 n° 2 (June 2011)PermalinkExploring ontologies for semantic interoperability of data in emergency response / Zhengjie Fan in Applied geomatics, vol 3 n° 2 (June 2011)PermalinkGéoréférencement des réseaux enterrés : des techniques de relevé à la gestion d’un cadastre du sous-sol / G. Cornette in XYZ, n° 127 (juin - août 2011)PermalinkTous hétéro...gènes ! / Françoise de Blomac in SIG la lettre, n° 128 (juin 2011)PermalinkAéroports : objets géographiques complexes / Françoise de Blomac in SIG la lettre, n° 126 (avril 2011)PermalinkHigh definition surveying and laser scanning : Leica Geosystems' Geoff Jacobs / J. Triglav in Geoinformatics, vol 14 n° 3 (01/04/2011)PermalinkSensors in web 2.0 / L. Bermudez in GEO: Geoconnexion international, vol 10 n° 4 (april 2011)PermalinkLa dimension géographique du SI : du SIG au composant géographique / Henri Pornon in Géomatique expert, n° 79 (01/03/2011)PermalinkGNSS inside mobile phones: GPS, GLONASS, QZSS and SBAS in a single chip / Franck Van Diggelen in Inside GNSS, vol 6 n° 2 (March - April 2011)Permalink