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Effect of generalization on area features: a comparative study of two strategies / T. Cheng in Cartographic journal (the), vol 43 n° 2 (July 2006)
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Titre : Effect of generalization on area features: a comparative study of two strategies Type de document : Article/Communication Auteurs : T. Cheng, Auteur ; Z. Li, Auteur Année de publication : 2006 Article en page(s) : pp 157 - 170 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] agrégation de détails
[Termes IGN] analyse comparative
[Termes IGN] carte thématique
[Termes IGN] fusion de données
[Termes IGN] généralisation cartographique automatisée
[Termes IGN] mesure de la qualité
[Termes IGN] objet géographique zonal
[Termes IGN] qualité des données
[Vedettes matières IGN] GénéralisationRésumé : (Auteur) The generalization of area features is a very important topic in digital map generalization, particularly in thematic map generalization. The operations used in area generalization, will cause changes in the geometry and thematic attributes of area features and the topological relationships between them. Very limited quantitative measures, especially for semantics, are available to describe the effect of generalization when multiple objects are involved or when the entire map needs to be characterized. Therefore, the aim of this study is to provide some quantitative measures for the changes (especially in semantics) that have occurred during generalization. A set of quantitative measures of data quality, i.e. accuracy, consistency, and completeness, has been developed to assess such effects. The effect of generalization on area features are compared between two approaches, geometry-based merging and theme-based aggregation. An experimental test has also been carried out to illustrate their differences in terms of the proposed quality measures, which demonstrates the practical usefulness of these measures. Numéro de notice : A2006-610 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1179/000870406X114649 En ligne : https://doi.org/10.1179/000870406X114649 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28333
in Cartographic journal (the) > vol 43 n° 2 (July 2006) . - pp 157 - 170[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 030-06021 RAB Revue Centre de documentation En réserve L003 Disponible Fuzzy classification: a case study using Landsat TM images in Iran / A.M. Lak in GIM international, vol 20 n° 7 (July 2006)
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Titre : Fuzzy classification: a case study using Landsat TM images in Iran Type de document : Article/Communication Auteurs : A.M. Lak, Auteur ; M. Hamrah, Auteur ; G.H. Majdabadi, Auteur Année de publication : 2006 Article en page(s) : pp 42 - 43 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] classification barycentrique
[Termes IGN] classification floue
[Termes IGN] classification hybride
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] distribution de Gauss
[Termes IGN] image Landsat-TM
[Termes IGN] Iran
[Termes IGN] MatlabRésumé : (Editeur) Extraction of information from satellite images is a solution for countries without up-to-date base maps. Such images can be easily obtained and cover vast areas. Information is mostly extracted using multispectral classification, but many methods have been developed. The authors examined 'fuzzy classification' and found it more accurate and requiring less computing time than other methods. Copyright GITC Numéro de notice : A2006-253 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27980
in GIM international > vol 20 n° 7 (July 2006) . - pp 42 - 43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-06071 RAB Revue Centre de documentation En réserve L003 Disponible Some issues in the classification of DAIS hyperspectral data / M. Pal in International Journal of Remote Sensing IJRS, vol 27 n°12-13-14 (July 2006)
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Titre : Some issues in the classification of DAIS hyperspectral data Type de document : Article/Communication Auteurs : M. Pal, Auteur ; Paul M. Mather, Auteur Année de publication : 2006 Article en page(s) : pp 2895 - 2916 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] classificateur paramétrique
[Termes IGN] classification dirigée
[Termes IGN] classification par arbre de décision
[Termes IGN] classification par maximum de vraisemblance
[Termes IGN] classification par réseau neuronal
[Termes IGN] classification par séparateurs à vaste marge
[Termes IGN] Espagne
[Termes IGN] image DAIS
[Termes IGN] image hyperspectrale
[Termes IGN] précision de la classification
[Termes IGN] qualité du processus
[Termes IGN] transformation orthogonaleRésumé : (Auteur) Classification accuracy depends on a number of factors, of which the nature of the training samples, the number of bands used, the number of classes to be identified relative to the spatial resolution of the image and the properties of the classifier are the most important. This paper evaluates the effects of these factors on classification accuracy using a test area in La Mancha, Spain. High spectral and spatial resolution DAIS data were used to compare the performance of four classification procedures (maximum likelihood, neural network, support vector machines and decision tree). There was no evidence to support the view that classification accuracy inevitably declines as the data dimensionality increases. The support vector machine classifier performed well with all test data sets. The use of the orthogonal MNF transform resulted in a decline in classification accuracy. However, the decision-tree approach to feature selection worked well. Small increases in classifier accuracy may be obtained using more sophisticated techniques, but it is suggested here that greater attention should be given to the collection of training and test data that represent the range of land surface variability at the spatial scale of the image. Copyright Taylor & Francis Numéro de notice : A2006-309 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500185227 En ligne : https://doi.org/10.1080/01431160500185227 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28033
in International Journal of Remote Sensing IJRS > vol 27 n°12-13-14 (July 2006) . - pp 2895 - 2916[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 080-06071 RAB Revue Centre de documentation En réserve L003 Disponible Landsat cross-calibration based on near simultaneous imaging of common targets / P.M. Teillet in Remote sensing of environment, vol 102 n° 3-4 (15 June2006)
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Titre : Landsat cross-calibration based on near simultaneous imaging of common targets Type de document : Article/Communication Auteurs : P.M. Teillet, Auteur ; B.L. Markham, Auteur ; R.R. Irish, Auteur Année de publication : 2006 Article en page(s) : pp 264 - 270 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] analyse comparative
[Termes IGN] bande spectrale
[Termes IGN] étalonnage de capteur (imagerie)
[Termes IGN] étalonnage radiométrique
[Termes IGN] flore locale
[Termes IGN] image Landsat-ETM+
[Termes IGN] image Landsat-TM
[Termes IGN] Nevada (Etats-Unis)Résumé : (Auteur) The paper presents the results of an extended analysis of image data sets acquired during the tandem-orbit configuration in 1999 for the purposes of radiometric cross-calibration of the Landsat-7 Enhanced Thematic Mapper Plus (ETM+) and Landsat-5 Thematic Mapper (TM) sensors. Earlier work focused on the tandem pair for the Railroad Valley Playa, Nevada (RVPN) site to tie down the Landsat-5 TM calibration based on the more accurate Landsat-7 ETM+ calibration. This paper describes new results based on as many as eight tandem image pairs. The additional tandem images are of primarily vegetated areas for which little or no ground reference data were available. Increasing the number of tandem pairs yielded results for the Landsat 5 TM gain coefficients within approximately +1% of the RVPN-based results in spectral bands 1, 2, 3 and 7, and within -2% and -4% of the RVPN-based results for spectral bands 4 and 5, respectively. Copyright Elsevier Numéro de notice : A2006-249 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.02.005 En ligne : https://doi.org/10.1016/j.rse.2006.02.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27976
in Remote sensing of environment > vol 102 n° 3-4 (15 June2006) . - pp 264 - 270[article]Assessment and comparison of registration algorithms between aerial images and laser point clouds / A. Pothou in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
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Titre : Assessment and comparison of registration algorithms between aerial images and laser point clouds Type de document : Article/Communication Auteurs : A. Pothou, Auteur ; S. Karamitos, Auteur ; et al., Auteur Année de publication : 2006 Conférence : ISPRS 2006, Commission 1 Symposium, From sensors to imagery 03/07/2006 06/07/2006 Champs-sur-Marne [Paris Marne-la-Vallée] France OA ISPRS Archives Article en page(s) : pp 28 - 31 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse comparative
[Termes IGN] couple stéréoscopique
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] fusion de données multisource
[Termes IGN] image aérienne
[Termes IGN] semis de points
[Termes IGN] superposition d'imagesRésumé : (Auteur) Photogrammetry, has been providing accurate coordinate measurements through the stereoscopic method for many years. LiDAR on the other hand, is becoming the prime method for large-scale acquisition of elevation data due to its capability of directly measuring 3D coordinates of a huge number of points. LiDAR can provide measurements in areas where traditional photogrammetric techniques encounter problems mainly due to occlusions or shadows. However LiDAR has also its limitations due to its inability of thematic information recording. The aim of this research is the optimum exploitation of both these elevation data sources. Usually this process is referred to as fusion of two datasets and exploits the advantages of both sources. The prerequisite step for the fusion of the two datasets is the co-registration. This paper describes a co-registration procedure, between the two datasets, that takes place through a 3D transformation. The performance of the algorithm A, which was presented in an earlier publication by the authors, and also an extended algorithm B based on the inclusion of the 7 transformation parameters, during the whole registration procedure, have been presented. Both algorithms developed based on the minimization of the distances between points of one surface to surface patches of the other surface, parallel to the corresponding surface normals. A comparison has also been performed between the results of the algorithms developed, in order to assess the geometric stability of the transformations, the analysis of the results, the effects on the registration and the accuracy of the derived parameters through stand-alone macros. Due to improved geometry of extended algorithm B an increased performance was expected. In fact the algorithm B converges 50% faster than the algorithm A. To support these tests a block of aerial images and a one month apart 3D laser point cloud were collected. Copyright SFPT Numéro de notice : A2006-620 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVI/part1/Papers/PS2-24.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28343
in Revue Française de Photogrammétrie et de Télédétection > n° 182 (Juin 2006) . - pp 28 - 31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 018-06021 RAB Revue Centre de documentation En réserve L003 Disponible Co-registration and inter-sensor comparison of MODIS and LANDSAT 7 ETM+ data aimed at NDVI calculation / P. Boccardo in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
PermalinkComparaison d'organisations spatiales agricoles : le système ROSA / J.L. Metzger in Revue internationale de géomatique, vol 16 n° 2 (juin – août 2006)
PermalinkDisplay of pixel loss and replication in reprojecting raster data from the sinusoidal projection / Denis White in Geocarto international, vol 21 n° 2 (June - August 2006)
PermalinkEvaluation of the potential of SAR ERS and ASAR Envisat sensors in multi-incidence and multi-polarisation modes for landscape study in French Guyana: examples of Kourou and Saint Laurent du Maroni / J.L. Kouame in Revue Française de Photogrammétrie et de Télédétection, n° 182 (Juin 2006)
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PermalinkRecent developments on direct relative orientation / H. Stewenius in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 4 (June - July 2006)
PermalinkReview trimble R8 GNSS versus Topcon HiPer Pro : GPS and Glonass combined receivers / Huibert-Jan Lekkerkerk in Geoinformatics, vol 9 n° 4 (01/06/2006)
PermalinkComparison of 3D physical and empirical models for generating DSMs from stereo HR images / Thierry Toutin in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 5 (May 2006)
PermalinkGeneration of DSMs from SPOT-5 in-track HRS and across-track HRG stereo data using spatiotriangulation and autocalibration / Thierry Toutin in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 3 (May 2006)
PermalinkHigh-resolution image fusion: methods to preserve spectral and spatial resolution / A. Svab in Photogrammetric Engineering & Remote Sensing, PERS, vol 72 n° 5 (May 2006)
PermalinkMulti-image matching for DSM generation from Ikonos imagery / Li Zhang in ISPRS Journal of photogrammetry and remote sensing, vol 60 n° 3 (May 2006)
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