Centre de documentation
scientifique

Backscatter coefficient as an attribute for the classification of full-waveform airborne laser scanning data in urban areas / C. Alexander in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 5 (September - October 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 5 (September - October 2010) . - pp 423 - 432 Titre : Backscatter coefficient as an attribute for the classification of full-waveform airborne laser scanning data in urban areas Type de document : Article/Communication Auteurs : C. Alexander, Auteur ; Kevin Tansey, Auteur ; J. Kaduk, Auteur ; David A. Holland, Auteur ; Nicholas J. Tate, Auteur Année de publication : 2010 Article en page(s) : pp 423 - 432 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] angle d'incidence [Termes IGN] classification dirigée [Termes IGN] classification par arbre de décision [Termes IGN] coefficient de rétrodiffusion [Termes IGN] données laser [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] lidar à retour d'onde complète [Termes IGN] milieu urbain [Termes IGN] semis de points [Termes IGN] télémétrie laser aéroporté Résumé : (Auteur) Airborne laser scanning (ALS) data are increasingly being used for land cover classification. The amplitudes of echoes from targets, available from full-waveform ALS data, have been found to be useful in the classification of land cover. However, the amplitude of an echo is dependent on various factors such as the range and incidence angle, which makes it difficult to develop a classification method which can be applied to full-waveform ALS data from different sites, scanning geometries and sensors. Additional information available from full-waveform ALS data, such as range and echo width, can be used for radiometric calibration, and to derive backscatter cross section. The backscatter cross section of a target is the physical cross sectional area of an idealised isotropic target, which has the same intensity as the selected target. The backscatter coefficient is the backscatter cross section per unit area. In this study, the amplitude, backscatter cross section and backscatter coefficient of echoes from ALS point cloud data collected from two different sites are analysed based on urban land cover classes. The application of decision tree classifiers developed using data from the first study area on the second demonstrates the advantage of using the backscatter coefficient in classification methods, along with spatial attributes. It is shown that the accuracy of classification of the second study area using the backscatter coefficient (kappa coefficient 0.89) is higher than those using the amplitude (kappa coefficient 0.67) or backscatter cross section (kappa coefficient 0.68). This attribute is especially useful for separating road and grass. Numéro de notice : A2010-445 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.05.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.05.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30638 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-2010051	SL	Revue	Centre de documentation	Revues en salle	Disponible

Accuracy 2010 : Proceedings of the Ninth international symposium on spatial accuracy assessment in natural resources and environmental sciences, Leicester, UK, 20 - 23 juillet 2010 / Nicholas J. Tate (2010)  

Public Titre : Accuracy 2010 : Proceedings of the Ninth international symposium on spatial accuracy assessment in natural resources and environmental sciences, Leicester, UK, 20 - 23 juillet 2010 Type de document : Actes de congrès Auteurs : Nicholas J. Tate, Éditeur scientifique ; Peter F. Fisher, Éditeur scientifique Editeur : Leicester [Royaume-Uni] : University of Leicester Année de publication : 2010 Autre Editeur : International Spatial Accuracy Research Association ISARA Conférence : Accuracy 2010, 9th international symposium on spatial accuracy assessment in natural resources and environmental sciences 20/07/2010 23/07/2010 Leicester Royaume-Uni OA Proceedings Importance : 436 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Termes IGN] données localisées des bénévoles [Termes IGN] géostatistique [Termes IGN] géovisualisation [Termes IGN] incertitude des données [Termes IGN] incertitude géométrique [Termes IGN] incertitude temporelle [Termes IGN] précision des données [Termes IGN] propagation d'erreur [Termes IGN] sous ensemble flou [Termes IGN] traitement de données localisées Index. décimale : CG2010 Actes de congrès en 2010 Note de contenu : 1 - Keynotes 2 - Remote sensing and image interpretation 3 - Fuzzy uncertainty 1 4 - Uncertainty in space and time 5 - Geostatistics 1 6 - ISPRS session 7 - Uncertainty propagation 8 - Land use and land cover 9 - DEM uncertainty 1 10 - Remote sensing 11 - Geoprocessing 12 - Model uncertainty and validation 13 - Vizualisation 14 - Sampling design 15 - Spatio-temporal uncertainty 16 - DEM uncertainty 2 17 - Geostatistics 2 18 - Fuzzy uncertainty 2 19 - DEM uncertainty 3 20 - Remote sensing classification 21 - Environmental quality 22 - Small area concerns 23 - Ecology and forestry 24 - VGI and web-based geoprocessing 25 - Geocoding and adress coding 26 - Posters Numéro de notice : 21370 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Actes DOI : sans En ligne : http://spatialaccuracy.org/spatial-accuracy-2010/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=90097

Contient

• Assessing the accuracy of 'crowdsourced' data and its itegration with official spatial data sets / Maythm Al-Bakri (2010)  
• Estimation of digitizing and polygonal approximation errors in the computation of length in vector databases / Jean-François Girres (2010)  

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
21370-01	CG2010	Livre	Centre de documentation	Congrès	Disponible

Advances in remote sensing and GIS analysis, [selected papers from a meeting held at the University of Southampton, July 25, 1996] / P.M. Atkinson (1999)

Public Titre : Advances in remote sensing and GIS analysis, [selected papers from a meeting held at the University of Southampton, July 25, 1996] Type de document : Actes de congrès Auteurs : P.M. Atkinson, Éditeur scientifique ; Nicholas J. Tate, Éditeur scientifique Editeur : New York, Londres, Hoboken (New Jersey), ... : John Wiley & Sons Année de publication : 1999 Importance : 273 p. Format : 18 x 25 cm ISBN/ISSN/EAN : 978-0-471-98577-8 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] analyse spatiale [Termes IGN] atmosphère terrestre [Termes IGN] bruit (théorie du signal) [Termes IGN] capteur spatial [Termes IGN] classification floue [Termes IGN] classification par réseau neuronal [Termes IGN] géologie [Termes IGN] géophysique [Termes IGN] image à très haute résolution [Termes IGN] image numérique [Termes IGN] modélisation [Termes IGN] occupation du sol [Termes IGN] réalité virtuelle [Termes IGN] système d'information géographique [Termes IGN] urbanisme [Termes IGN] utilisation du sol Index. décimale : 35.40 Applications de télédétection - généralités Résumé : (Editeur) Remote sensing and GIS are technologies for the new millennium. This book brings together some of the most recent developments in these complimentary fields, with a particular emphasis on mathematical techniques and their application. The range of techniques covered includes fuzzy classification, artificial neural networks, geostatistical techniques (such as kriging, cokriging , stochastic simulation and regularization), texture classification, fractals, per-parcel classification, raster and vector data integration and process modelling. The range of applications includes land cover and land use mapping, cloud tracking, snow cover mapping and air temperature monitoring, topographic mapping, geological classification and soil erosion modelling. . Note de contenu : PART ONE: ON GEOCOMPUTATION 1 Foundations / Paul A Longley 2 Geocomputation in Context / Helen Couclelis PART TWO: ON DATA AND DOCUMENTATION 3 Remote Sensing : From Data to Understanding / Paul J Curran, Edward J Milton, Peter M Atkinson and Giles M Foody 4 Different Data Sources and Diverse Data Structures : Metadata and Other Solutions / Michael F. Goodchild PART THREE: DIAGNOSTICS AND PATTERN DETECTION 5 Exploratory Spatial Data Analysis in a Geocomputational Environment / Luc Anselin 6 Building Automated Geographical Analysis and Explanation Machines / Stan Openshaw PART FOUR: REAL AND VIRTUAL ENVIRONMENTS 7 Visualising Different Geofutures / Keith C Clarke 8 Modelling Virtual Environments / Michael Batty, Martin Dodge, Simon Doyle and Andy Smith PART FIVE: SPACETIME DYNAMICS 9 Dynamic Modelling and Geocomputation / Peter A Burrough 10 On the Status and Opportunities for Physical Process Modelling in Geomorphology / S.M. Brooks and M. G. Anderson 11 On Complex Geographical Space : Computing Frameworks for Spatial Diffusion Processes / Andrew D. Cliff and Peter Haggett Numéro de notice : 11726 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Actes Accessibilité hors numérique : Accessible via le SUDOC (sur demande au cdos) Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=40049