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contenu dans Advances in Spatial Data Handling : 10th International Symposium on Spatial Data Handling / Dianne Richardson (2002)

Titre :	Detecting building alignments for generalisation purposes
Type de document :	Article/Communication
Auteurs :	Sidonie Christophe , Auteur ; Anne Ruas , Auteur
Editeur :	Berlin, Heidelberg, Vienne, New York, ... : Springer
Année de publication :	2002
Conférence :	SDH 2002, 10th international symposium on Spatial Data Handling 09/07/2002 12/07/2002 Ottawa Canada Proceedings Springer
Importance :	pp 419 - 432
Note générale :	Bibliographie
Langues :	Anglais (eng)
Descripteur :	[Termes IGN] alignement [Termes IGN] analyse spatiale [Termes IGN] bati [Termes IGN] généralisation cartographique automatisée [Termes IGN] Lamps2 [Termes IGN] reconnaissance de formes [Vedettes matières IGN] Généralisation
Résumé :	(Auteur) Generalisation is well recognised as a complex process that should trigger specific algorithms, on different types of objects in some logical or appropriate order. To guide the process (where and how to generalise) one solution is to distinguish characterisation from the generalisation process. Characterisation aims at finding and describing relevant 'working areas' that can be a part of an object or a set of objects. As a result, the choice of an appropriate algorithm(s) becomes easier and can be constrained by the detected properties of this new entity. This paper presents a method to both detect and characterise building alignments in an effort to improve the use of generalisation algorithms namely typification and displacement. The first step consists of the identification of building alignments from straight-line templates. The second step characterises these alignments to retain only those that are perceptually regular. The characterisation is based on an analysis of the spatial location of buildings as well as on the properties of the buildings that belong to the alignment in question. To evaluate the regularity of the distribution, estimators are proposed for each property. At the end a global quality estimator of the perceptual alignment- based on the aggregation of the estimators - is proposed. This global estimator is used to retain the best building alignments that will then be carefully generalised. The results presented have been implemented in the Lamps2 GIS software.
Numéro de notice :	C2002-005
Affiliation des auteurs :	COGIT (1988-2011)
Thématique :	GEOMATIQUE
Nature :	Communication
nature-HAL :	ComAvecCL&ActesPubliésIntl
DOI :	10.1007/978-3-642-56094-1_31
En ligne :	https://doi.org/10.1007/978-3-642-56094-1_31
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=64963

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contenu dans Advances in Spatial Data Handling : 10th International Symposium on Spatial Data Handling / Dianne Richardson (2002)

Titre :	A methodology for updating geographic databases using map versions
Type de document :	Article/Communication
Auteurs :	Ally Peerbocus, Auteur ; Geneviève Jomier, Auteur ; Thierry Badard , Auteur
Editeur :	Berlin, Heidelberg, Vienne, New York, ... : Springer
Année de publication :	2002
Conférence :	SDH 2002, 10th international symposium on Spatial Data Handling 09/07/2002 12/07/2002 Ottawa Canada Proceedings Springer
Importance :	pp 363 - 376
Note générale :	Bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Bases de données localisées [Termes IGN] base de données localisées [Termes IGN] cohérence des données [Termes IGN] conflit d'intégration [Termes IGN] intégration de données [Termes IGN] mise à jour de base de données [Termes IGN] système d'information géographique
Résumé :	(Auteur) This paper addresses issues concerning the exchange and integration of geographic data between producers and users. Once a producer has delivered a geographic database to a user, who then uses it as a reference for specific applications, the database may be updated on both sides. Consequently, the integration of future updates - delivered by the producer -in the user's geographic database is a complex operation due to possible conflicts between updates performed by both parties. The resulting database may become inconsistent and the user's added information may be lost. Users therefore need mechanisms to help them in the process of update integration. This paper provides a methodological framework for the updating of geographic databases. It relies on a multi-version GIS, allowing an automatic detection of conflicting updates between two map versions.
Numéro de notice :	C2002-009
Affiliation des auteurs :	COGIT+Ext (1988-2011)
Thématique :	GEOMATIQUE/INFORMATIQUE
Nature :	Communication
nature-HAL :	ComAvecCL&ActesPubliésIntl
DOI :	10.1007/978-3-642-56094-1_27
En ligne :	https://doi.org/10.1007/978-3-642-56094-1_27
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=64967

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contenu dans Advances in Spatial Data Handling : 10th International Symposium on Spatial Data Handling / Dianne Richardson (2002)

Titre :	Map samples to help GI users specify their needs
Type de document :	Article/Communication
Auteurs :	Frédéric Hubert, Auteur
Editeur :	Berlin, Heidelberg, Vienne, New York, ... : Springer
Année de publication :	2002
Conférence :	SDH 2002, 10th international symposium on Spatial Data Handling 09/07/2002 12/07/2002 Ottawa Canada Proceedings Springer
Importance :	pp 533 - 545
Note générale :	Bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Infrastructure de données [Termes IGN] accès aux données localisées [Termes IGN] données localisées [Termes IGN] échantillon [Termes IGN] interface web [Termes IGN] langage naturel (informatique) [Termes IGN] requête spatiale
Résumé :	(Auteur) Accessing the user interfaces proposed by GISs, G-DBMS or geographic Web sites shows how complex they may prove for novice users of geographic information. Such users have needs in geographic information, but they do not have the means to express them and thus to adequately fulfil them. The objective of this paper is to outline an approach that may help users specify their needs with geographic information. This approach consists in converging on one available solution, the closest possible to the user needs, by using new means of communication between user and computer: map samples and natural language. Map samples are geographical data, extracted from the database and possibly processed by available GIS treatments. A few map samples are proposed to the user, who makes the relevant choices. The system tries to "understand" the interactions to help in the choosing. A search engine navigates through the available map samples in order to identify the most appropriate map samples and proposes them to help the user identify the need more precisely. Natural language allows the expression of user needs to be captured in a manner more consistent with a dialogue and provides more freedom or versatility for example, for general queries and quantitative evaluation. A virtual scenario shows the combination between these two languages.
Numéro de notice :	C2002-007
Affiliation des auteurs :	COGIT (1988-2011)
Thématique :	GEOMATIQUE
Nature :	Communication
nature-HAL :	ComAvecCL&ActesPubliésIntl
DOI :	10.1007/978-3-642-56094-1_39
En ligne :	https://doi.org/10.1007/978-3-642-56094-1_39
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=64965

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contenu dans Advances in Spatial Data Handling : 10th International Symposium on Spatial Data Handling / Dianne Richardson (2002)

Titre :	A new merging process for data integration based on the Discrete Fréchet Distance
Type de document :	Article/Communication
Auteurs :	Thomas Devogele , Auteur
Editeur :	Berlin, Heidelberg, Vienne, New York, ... : Springer
Année de publication :	2002
Conférence :	SDH 2002, 10th international symposium on Spatial Data Handling 09/07/2002 12/07/2002 Ottawa Canada Proceedings Springer
Importance :	pp 167 - 182
Note générale :	bibliographie
Langues :	Anglais (eng)
Descripteur :	[Vedettes matières IGN] Bases de données localisées [Termes IGN] appariement de données localisées [Termes IGN] distance de Fréchet [Termes IGN] fusion de données [Termes IGN] intégration de données
Résumé :	(auteur) The overlay process is currently one of the main computational solutions used to integrate several data layers from different sources. Unfortunately, it is problematic when trying to overlay many layers. This leads to several geometric problems such as the management of sliver polygons. This paper proposes a new merging process to complement the vector overlay for data integration of several layers. This process, based on measures derived from the Fréchet distance, matches common points (either lines or polygons). It also merges an ordered set of pairs of matching points (vertices) into a single geometry.
Numéro de notice :	C2002-023
Affiliation des auteurs :	non IGN
Thématique :	GEOMATIQUE
Nature :	Communication
nature-HAL :	ComAvecCL&ActesPubliésIntl
DOI :	10.1007/978-3-642-56094-1_13
En ligne :	https://doi.org/10.1007/978-3-642-56094-1_13
Format de la ressource électronique :	URL article
Permalink :	https://documentation.ensg.eu/index.php?lvl=notice_display&id=79515

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Sélection de la langue

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L'actu ! Horaires du CDOS

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2014 -2024 IGN

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scientifique