Descripteur
Termes IGN > 1- Outils - instruments et méthodes > méthode > analyse comparative
analyse comparativeVoir aussi |
Documents disponibles dans cette catégorie (1187)
Ajouter le résultat dans votre panier
Visionner les documents numériques
Affiner la recherche Interroger des sources externes
Etendre la recherche sur niveau(x) vers le bas
Visual comparison of moving-window kriging models / Urška Demšar in Cartographica, vol 46 n° 4 (December 2011)
[article]
Titre : Visual comparison of moving-window kriging models Type de document : Article/Communication Auteurs : Urška Demšar, Auteur ; P. Harris, Auteur Année de publication : 2011 Article en page(s) : pp 211 - 226 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse comparative
[Termes IGN] krigeage
[Termes IGN] visualisation cartographiqueRésumé : (Auteur) Kriging is a spatial prediction method that is core to the geo-statistical paradigm. Commonly applied in the environmental sciences, it enables a prediction at an unsampled location coupled with a measure of confidence in its accuracy. Many variations of kriging exist, some of them complex, especially those that allow many parameters to vary spatially. Calibrating such a kriging model and interpreting its results can therefore be quite daunting. We suggest that visualization and visual exploration can help with this task. In particular, we focus on the moving-window kriging model, evaluating three newly developed robust variants of this model against a basic counterpart. We use star icon maps and plots to visually explore model results to evaluate model parameterization, specification, and performance. Numéro de notice : A2011-483 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.46.4.211 En ligne : https://doi.org/10.3138/carto.46.4.211 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31377
in Cartographica > vol 46 n° 4 (December 2011) . - pp 211 - 226[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 031-2011041 SL Revue Centre de documentation Revues en salle Disponible Intercomparison and validation of techniques for spectral unmixing of hyperspectral images : a planetary case study / X. Ceamanos in IEEE Transactions on geoscience and remote sensing, vol 49 n° 11 Tome 1 (November 2011)
[article]
Titre : Intercomparison and validation of techniques for spectral unmixing of hyperspectral images : a planetary case study Type de document : Article/Communication Auteurs : X. Ceamanos, Auteur ; S. Douté, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 4341 - 4358 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] analyse des mélanges spectraux
[Termes IGN] image hyperspectrale
[Termes IGN] Mars (planète)Résumé : (Auteur) As the volume of hyperspectral data for planetary exploration increases, efficient yet accurate algorithms are decisive for their analysis. In this paper, the capability of spectral unmixing for analyzing hyperspectral images from Mars is investigated. For that purpose, we consider the Russell megadune observed by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) and the High-Resolution Imaging Science Experiment (HiRISE) instruments. In late winter, this area of Mars is appropriate for testing linear unmixing techniques because of the geographical coexistence of seasonal CO2 ice and defrosting dusty features that is not resolved by CRISM. Linear unmixing is carried out on a selected CRISM image by seven state-of-the-art approaches based on different principles. Three physically coherent sources with an increasing fingerprint of dust are recognized by the majority of the methods. Processing of HiRISE imagery allows the construction of a ground truth in the form of a reference abundance map related to the defrosting features. Validation of abundances estimated by spectral unmixing is carried out in an independent and quantitative manner by comparison with the ground truth. The quality of the results is estimated through the correlation coefficient and average error between the reconstructed and reference abundance maps. Intercomparison of the selected linear unmixing approaches is performed. Global and local comparisons show that misregistration inaccuracies between the HiRISE and CRISM images represent the major source of error. We also conclude that abundance maps provided by three methods out of seven are generally accurate, i.e., sufficient for a planetary interpretation. Numéro de notice : A2011-447 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2140377 Date de publication en ligne : 19/05/2011 En ligne : https://doi.org/10.1109/TGRS.2011.2140377 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31225
in IEEE Transactions on geoscience and remote sensing > vol 49 n° 11 Tome 1 (November 2011) . - pp 4341 - 4358[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2011111A RAB Revue Centre de documentation En réserve L003 Disponible Validation of GOCE gravity field models by means of orbit residuals and geoid comparisons / Thomas Gruber in Journal of geodesy, vol 85 n° 11 (November /2011)
[article]
Titre : Validation of GOCE gravity field models by means of orbit residuals and geoid comparisons Type de document : Article/Communication Auteurs : Thomas Gruber, Auteur ; P. Visser, Auteur ; C. Ackermann, Auteur ; M. Hosse, Auteur Année de publication : 2011 Article en page(s) : pp 845 - 860 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] analyse comparative
[Termes IGN] analyse de variance
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] données GOCE
[Termes IGN] données GRACE
[Termes IGN] géoïde gravimétrique
[Termes IGN] géoïde terrestre
[Termes IGN] harmonique sphérique
[Termes IGN] limite de résolution géométrique
[Termes IGN] orbitographie
[Termes IGN] résiduRésumé : (Auteur) Three GOCE-based gravity field solutions have been computed by ESA’s high-level processing facility and were released to the user community. All models are accompanied by variance-covariance information resulting either from the least squares procedure or a Monte-Carlo approach. In order to obtain independent external quality parameters and to assess the current performance of these models, a set of independent tests based on satellite orbit determination and geoid comparisons is applied. Both test methods can be regarded as complementary because they either investigate the performance in the long wavelength spectral domain (orbit determination) or in the spatial domain (geoid comparisons). The test procedure was applied to the three GOCE gravity field solutions and to a number of selected pre-launch models for comparison. Orbit determination results suggest, that a pure GOCE gravity field model does not outperform the multi-year GRACE gravity field solutions. This was expected as GOCE is designed to improve the determination of the medium to high frequencies of the Earth gravity field (in the range of degree and order 50 to 200). Nevertheless, in case of an optimal combination of GOCE and GRACE data, orbit determination results should not deteriorate. So this validation procedure can also be used for testing the optimality of the approach adopted for producing combined GOCE and GRACE models. Results from geoid comparisons indicate that with the 2 months of GOCE data a significant improvement in the determination of the spherical harmonic spectrum of the global gravity field between degree 50 and 200 can be reached. Even though the ultimate mission goal has not yet been reached, especially due to the limited time span of used GOCE data (only 2 months), it was found that existing satellite-only gravity field models, which are based on 7 years of GRACE data, can already be enhanced in terms of spatial resolution. It is expected that with the accumulation of more GOCE data the gravity field model resolution and quality can be further enhanced, and the GOCE mission goal of 1–2 cm geoid accuracy with 100 km spatial resolution can be achieved. Numéro de notice : A2011-470 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-011-0486-7 Date de publication en ligne : 08/06/2011 En ligne : https://doi.org/10.1007/s00190-011-0486-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31364
in Journal of geodesy > vol 85 n° 11 (November /2011) . - pp 845 - 860[article]Réservation
Réserver ce documentExemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 266-2011111 RAB Revue Centre de documentation En réserve L003 Disponible Damage assessment of 2010 Haïti earthquake with post-earthquake satellite image by support vector selection and adaptation / Gülsen Taskin Kaya in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 10 (October 2011)
[article]
Titre : Damage assessment of 2010 Haïti earthquake with post-earthquake satellite image by support vector selection and adaptation Type de document : Article/Communication Auteurs : Gülsen Taskin Kaya, Auteur ; Nebiye Musaoglu, Auteur ; Okan Ersoy, Auteur Année de publication : 2011 Article en page(s) : pp 1025 - 1035 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse comparative
[Termes IGN] carte thématique
[Termes IGN] catastrophe naturelle
[Termes IGN] classification par séparateurs à vaste marge
[Termes IGN] dommage matériel
[Termes IGN] Haïti
[Termes IGN] image multitemporelle
[Termes IGN] image satellite
[Termes IGN] séismeRésumé : (Auteur) Remote sensing technology is a powerful tool to extract regions damaged after an earthquake. There are two methodological approaches in detection of earthquake damage: mono-temporal and multi-temporal. Especially for providing effective emergency management, the mono-temporal approach is generally preferred in extraction of earthquake damage as it does not depend on availability of pre-earthquake imagery. For this purpose, a novel method called support vector selection and adaptation (svsa) has been introduced to detect the damaged regions from a post-earthquake image. In this study, the SVSA method was applied to the region where the Haiti Presidential Palace and Cathedral is located, and the damaged regions were identified. The performance of the SVSA method in identification of the damaged regions was evaluated by comparing the thematic maps obtained by classifying pre- and post-earthquake images. Additionally, the damage patterns for the city of Port-au-Prince were estimated by the SVSA. Numéro de notice : A2011-433 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.77.10.1025 En ligne : https://doi.org/10.14358/PERS.77.10.1025 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31211
in Photogrammetric Engineering & Remote Sensing, PERS > vol 77 n° 10 (October 2011) . - pp 1025 - 1035[article]Estimation of forest stand volume, tree density and biodiversity using Landsat ETM + Data, comparison of linear and regression tree analyses / Jahangir Mohammadi in Procedia Environmental Sciences, vol 7 (2011)
[article]
Titre : Estimation of forest stand volume, tree density and biodiversity using Landsat ETM + Data, comparison of linear and regression tree analyses Type de document : Article/Communication Auteurs : Jahangir Mohammadi, Auteur ; Shaban Shataee, Auteur ; Manoocher Babanezhad, Auteur Année de publication : 2011 Article en page(s) : pp 299 - 304 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] analyse comparative
[Termes IGN] estimation statistique
[Termes IGN] image Landsat-ETM+
[Termes IGN] Iran
[Termes IGN] régression linéaire
[Termes IGN] régression multipleRésumé : (auteur) Estimation of forest attributes using remotely sensed data has being as a new potential for continuous management of natural resources. Simple statistical models such as linear regressions are most used approach that has been used by researchers. Applying other regression types in forest attribute estimations and their spatial modeling using decision tree analysis such as regression tree may be more usefulness compare to linear regression. In a case study in the Hyrcanian forests, northern of Iran, the capability of linear and regression tree analyses were compared to estimation of stand volume, tree density and tree diversity. Stepwise multiple regression and regression tree analyses were conducted to evaluate relationships between forest characteristics as dependent and ETM + bands and vegetation indices as independent variables. Performance assessment of models was examined using RMSE and Bias on the unused validation plots. The results of analysis showed that statistical models of stand volume, tree density, species richness and reciprocal of Simpson indices using tree regression analysis had higher adjusted R2 and CE compare to linear regression models. In addition, the performance results showed that RMSE of models using tree regression were 88.7 m3/ha, 157n/ha, 1.15 and 0.61 respectively for stand volume, tree density, species richness and Simpson index, Whereas, the RMSE of obtained models using linear regression were computed about 97m3/ha, 170n/ha, 1.51 and 1.15, respectively. Numéro de notice : A2011-630 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE/MATHEMATIQUE Nature : Article DOI : 10.1016/j.proenv.2011.07.052 En ligne : https://doi.org/10.1016/j.proenv.2011.07.052 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=102450
in Procedia Environmental Sciences > vol 7 (2011) . - pp 299 - 304[article]Éclairer le choix des outils de simulation des changements des modes d’occupation et d’usages des sols : Une approche comparative / J. Mas in Revue internationale de géomatique, vol 21 n° 3 (septembre - novembre 2011)PermalinkPrediction of the error induced by topography in satellite microwave radiometric observations / Luca Pulvirenti in IEEE Transactions on geoscience and remote sensing, vol 49 n° 9 (September 2011)PermalinkThe right attitude: Experimenting with GPS on board high-altitude balloons / P. Buist in GPS world, vol 22 n° 9 (September 2011)PermalinkAn evaluation of solar radiation pressure strategies for the GPS constellation / Ant Sibthorpe in Journal of geodesy, vol 85 n° 8 (August 2011)PermalinkEmpirical comparison of full-waveform Lidar algorithms: range extraction and discrimination performance / C. Parrish in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 8 (August 2011)PermalinkA comparison of fuzzy AHP and ideal point methods for evaluating land suitability / M. Elaalem in Transactions in GIS, vol 15 n° 3 (July 2011)PermalinkHigh-resolution atmospheric angular momentum functions related to Earth rotation parameters during CONT08 / Daniel Gambis in Journal of geodesy, vol 85 n° 7 (July 2011)PermalinkMulti-technique comparison of troposphere zenith delays and gradients during CONT08 / Kamil Teke in Journal of geodesy, vol 85 n° 7 (July 2011)PermalinkA slope-based method for matching elevation surfaces / D. Streutker in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 7 (July 2011)PermalinkThe Harvest experiment LIDAR system : Water level measurement device comparison for Jason-1 and Jason-2/OSTM calibration / S. Washburn in Marine geodesy, vol 34 n° 3-4 (July - december 2011)PermalinkComparaison lasergrammétrie - photogrammétrie pour la mesure de l'érosion de pierres de façade : Abbatiale de Manglieu, Puy-de-Dôme / Franck Vautier in Collection EDYTEM. cahiers de géographie, n° 12 (01/06/2011)PermalinkComparison of DMC, UltraCam, and ADS40 imagery for benthic habitat and propeller scar mapping / K. Green in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 6 (June 2011)PermalinkComparison of the city maps’ content of western, Eastern and central European cities / Agata Ciołkosz-Styk in AUC Geographica (Acta Universitatis Carolinae Geographica), vol 46 n° 1 (2011)PermalinkQuality analysis of OpenStreetMap data based on application needs / J. Mondzech in Cartographica, vol 46 n° 2 (June 2011)PermalinkEtude de la précision du satellite lidar GLAS/ICESat pour l'altimétrie des eaux continentales / N. Lemarquand in Revue Française de Photogrammétrie et de Télédétection, n° 194 (Mai 2011)PermalinkIndirect georeferencing of digital SLR [single-lens reflex] imagery using signalised lidar control points / Edson Aparecido Mitishita in Photogrammetric record, vol 26 n° 133 (March - May 2011)PermalinkCombined analysis of observations from different global navigation satellite systems / Michael Meindl (2011)PermalinkComparaisons de nivellement sur le bassin ferrifère lorrain, version 1 / Sylvain Lavoué (2011)PermalinkComparaisons de nivellement sur les secteurs de Sancy et Jarny, version 1 / Sylvain Lavoué (2011)PermalinkDétection de changement 2D à partir d’imagerie satellitaire : Application à la mise à jour des bases de données géographiques / Nicolas Champion (2011)Permalink