Centre de documentation
scientifique

Parcel-based classification / J. Wijnant in GEO: Geoconnexion international, vol 5 n° 2 (february 2006)

Public [article]  inGEO: Geoconnexion international > vol 5 n° 2 (february 2006) . - pp 22 - 24 Titre : Parcel-based classification Type de document : Article/Communication Auteurs : J. Wijnant, Auteur ; T. Steenberghen, Auteur Année de publication : 2006 Article en page(s) : pp 22 - 24 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] classification orientée objet [Termes IGN] classification pixellaire [Termes IGN] image à haute résolution [Termes IGN] milieu urbain [Termes IGN] parcelle cadastrale [Termes IGN] précision de la classification [Termes IGN] utilisation du sol Résumé : (Auteur) For many years high resolution imagery like Ikonos and QuickBird has been available to the public. In contrast to our common sense the increase in spatial resolution does not automatically lead to improved classification accuracy, in particular in urban areas. The automatic classification of land cover classes often requires an object-based approach where classification is based on homogeneous objects, rather than pixels. Because traditional image analysis software is not adapted to this new methodology, the user is forced to invest in expensive new software or to develop new algorithms. This paper presents an alternative classification method, parcel-based, in order to overcome these obstacles. In a first phase an ordinary per-pixel classification is performed and results are summarized and assigned to land parcels. In next phase the land parcels are classified into final land use classes by means of a discriminant analysis of the parcels. Numéro de notice : A2006-052 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74920 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
062-06021	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Intra-urban location and clustering of road accidents using GIS: a Belgian example / T. Steenberghen in International journal of geographical information science IJGIS, vol 18 n° 2 (march 2004)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 18 n° 2 (march 2004) . - pp 169 - 181 Titre : Intra-urban location and clustering of road accidents using GIS: a Belgian example Type de document : Article/Communication Auteurs : T. Steenberghen, Auteur ; Isabelle Thomas, Auteur ; et al., Auteur Année de publication : 2004 Article en page(s) : pp 169 - 181 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] accident de la route [Termes IGN] agrégation de données [Termes IGN] analyse comparative [Termes IGN] analyse de groupement [Termes IGN] base de données urbaines [Termes IGN] Belgique [Termes IGN] flux [Termes IGN] géocodage [Termes IGN] réseau routier [Termes IGN] sécurité routière [Termes IGN] segmentation dynamique [Termes IGN] système d'information géographique [Termes IGN] trafic routier [Termes IGN] trafic urbain [Termes IGN] zone urbaine Résumé : (Auteur) This paper aims to show the usefulness of GIS and point pattern techniques for defining road-accident black zones within urban agglomerations. The location of road accidents is based on dynamic segmentation, address geocoding and intersection identification. One-dimensional (line) and two-dimensional (area) clustering techniques for road accidents are compared. Advantages and drawbacks are discussed in relation to network and traffic characteristics. Linear spatial clustering techniques appear to be better suited when traffic flows can be clearly identified along certain routes. For dense road networks with diffuse traffic patterns, two-dimensional techniques make it possible to identify accident-prone areas. The operationality of the techniques is illustrated by showing the impact of traffic-calming measures on the location and type of accidents in one Belgian town (Mechelen). Numéro de notice : A2004-041 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810310001629619 En ligne : https://doi.org/10.1080/13658810310001629619 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26569 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-04021	RAB	Revue	Centre de documentation	En réserve L003	Disponible