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Spectral identification of materials by reflectance spectral library search / Rama Rao Nidamanuri in Geocarto international, vol 29 n° 5 - 6 (August - October 2014)
[article]
Titre : Spectral identification of materials by reflectance spectral library search Type de document : Article/Communication Auteurs : Rama Rao Nidamanuri, Auteur ; A. M. Ramiya, Auteur Année de publication : 2014 Article en page(s) : pp 609-624 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection
[Termes IGN] appariement spectral
[Termes IGN] image hyperspectrale
[Termes IGN] réflectance spectrale
[Termes IGN] signature spectraleRésumé : (auteur) Spectral library search is emerging as a viable approach for material identification and mapping by reusing spectral knowledge gained from hyperspectral remote sensing across space and time. The potential of retrieving meaningful spectral material identifications in the presence of reflectance of spectra of various material types and with various similarity metrics has been assessed in this study. Test reflectance spectra of various vegetation, minerals, soils and urban material types are identified by searching through the composite reflectance spectral library obtained by combining various institutional reflectance spectral libraries. The accuracy of material identifications under various conditions: (i) in the presence of identical, similar and dissimilar spectra; (ii) in the presence of only identical and dissimilar spectra; and (iii) in the presence of only dissimilar spectra has been assessed with several similarity metrics. Results indicate the possibility of obtaining 100% accurate material identifications by library search if the spectral library contains identical spectra. However, the presence of a large number of similar spectra, despite the presence of identical spectra, is found to increase false positives, thereby reducing the accuracy of retrievals to 82% at best. Further, the accuracy of material identifications in the presence of similar spectra is similarity metric-dependent and varied from about 52% (obtained from Binary Encoding) to 82% (obtained from Normalized Spectral Similarity Score). Overall, results support the possibility of using independent reflectance spectral libraries for material identification while calling for robust spectral similarity metrics. Numéro de notice : A2014-418 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106049.2013.821175 En ligne : https://doi.org/10.1080/10106049.2013.821175 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73953
in Geocarto international > vol 29 n° 5 - 6 (August - October 2014) . - pp 609-624[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 059-2014031 RAB Revue Centre de documentation En réserve L003 Disponible A high-quality, homogenized, global, long-term (1993–2008) DORIS precipitable water data set for climate monitoring and model verification / Olivier Bock in Journal of geophysical research : Atmospheres, vol 119 n° 12 (2014)
[article]
Titre : A high-quality, homogenized, global, long-term (1993–2008) DORIS precipitable water data set for climate monitoring and model verification Type de document : Article/Communication Auteurs : Olivier Bock , Auteur ; Pascal Willis , Auteur ; Junhong Wang, Auteur ; Carl Mears, Auteur Année de publication : 2014 Article en page(s) : pp 7209 - 7230 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse comparative
[Termes IGN] changement climatique
[Termes IGN] cohérence des données
[Termes IGN] données DORIS
[Termes IGN] erreur systématique
[Termes IGN] précipitation
[Termes IGN] prévision météorologique
[Termes IGN] retard troposphérique zénithal
[Termes IGN] série temporelle
[Termes IGN] vapeur d'eauRésumé : (auteur) For the first time a high-quality, consistent, global, long-term data set of zenith tropospheric delay (ZTD) and precipitable water (PW) is produced from Doppler orbitography radiopositioning integrated by satellite (DORIS) measurements at 81 sites. The data set was screened using a two-level procedure. First, postprocessing information is used to apply range checks and outlier checks to ZTD and formal error estimates. Second, outliers are detected by comparing DORIS ZTD with European Centre for Medium-Range Weather Forecasts reanalysis (ERA-Interim) data. These procedures reject 3% and 1% of the data, respectively. A linear drift is evidenced in the screened DORIS ZTD data compared to ERA-Interim and Global Positioning System (GPS) data, which potentially results from biases introduced by the progressive replacement of Alcatel antennas with Starec antennas. The DORIS PW is homogenized by applying a bias correction computed form comparison with ERA-Interim data each time station equipment is changed. The homogenized DORIS data are in excellent agreement with GPS data (correlation of 0.98 and standard deviation of differences of 1.5 kg m−2) and with ERA-Interim and satellite PW data (correlation > 0.95 and standard deviation of differences Numéro de notice : A2014-667 Affiliation des auteurs : LASTIG LAREG+Ext (2012-mi2018) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1002/2013JD021124 Date de publication en ligne : 16/05/2014 En ligne : http://dx.doi.org/10.1002/2013JD021124 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78464
in Journal of geophysical research : Atmospheres > vol 119 n° 12 (2014) . - pp 7209 - 7230[article]Crop type classification by simultaneous use of satellite images of different resolutions / Mark W. Liu in IEEE Transactions on geoscience and remote sensing, vol 52 n° 6 Tome 2 (June 2014)
[article]
Titre : Crop type classification by simultaneous use of satellite images of different resolutions Type de document : Article/Communication Auteurs : Mark W. Liu, Auteur ; Mutlu Ozdogan, Auteur ; Xiaojin Zhu, Auteur Année de publication : 2014 Article en page(s) : pp 3637 - 3649 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] agriculture
[Termes IGN] analyse multirésolution
[Termes IGN] carte de la végétation
[Termes IGN] classification
[Termes IGN] fréquence
[Termes IGN] réflectance végétaleRésumé : (Auteur) Accurate and timely identification of crop types has significant economic, agricultural, policy, and environmental applications. The existing remote sensing methods to identify crop types rely on remotely sensed images of high temporal frequency in order to utilize phenological changes in crop reflectance characteristics. However, these image sets generally have relatively low spatial resolution. This tradeoff makes it difficult to classify remotely sensed images in fragmented landscapes where field sizes are smaller than the resolution of imaging sensor. Here, we develop a method for combining high spatial resolution (high-resolution) data with images with low spatial resolution but with high time frequency to achieve a superior classification of crop types. The solution is implemented and tested on both synthetic and real data sets as a proof of concept. We show that, by incorporating high-temporal-frequency but low spatial resolution data into the classification process, up to 20% of improvement in classification accuracy can be achieved even if very few high-resolution images are available for a location. This boost in accuracy is roughly equivalent to including an additional high-resolution image to the temporal stack during the classification process. The limitations of the current algorithm include computational performance and the need for ideal crop curves. Nevertheless, the resulting boost in accuracy can help researchers create superior crop type classification maps, thereby creating the opportunity to make more informed decisions. Numéro de notice : A2014-313 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2274431 En ligne : https://doi.org/10.1109/TGRS.2013.2274431 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33216
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 6 Tome 2 (June 2014) . - pp 3637 - 3649[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2014061B RAB Revue Centre de documentation En réserve L003 Disponible Determination of periodic variations in sub-daily GPS positions of volcanic areas / Gözde Akay in Geomatica, vol 68 n° 2 (June 2014)
[article]
Titre : Determination of periodic variations in sub-daily GPS positions of volcanic areas Type de document : Article/Communication Auteurs : Gözde Akay, Auteur ; Peter Dare, Auteur ; Richard B. Langley, Auteur Année de publication : 2014 Article en page(s) : pp 107 - 117 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] analyse diachronique
[Termes IGN] analyse spectrale
[Termes IGN] Antilles (îles des)
[Termes IGN] déformation de la croute terrestre
[Termes IGN] données GPS
[Termes IGN] méthode des moindres carrés
[Termes IGN] positionnement par GPS
[Termes IGN] séisme
[Termes IGN] station GPS
[Termes IGN] variation diurne
[Termes IGN] volcanRésumé : (auteur) La déformation causée par un volcan (par de l’activité volcanique, p. ex.) peut être un bon indicateur de processus volcaniques. Pour capter ce mouvement, il peut être utile de mesurer les déformations du sol à l’aide d’outils géodésiques. Le présent article porte sur la détection de mouvements à court terme qui ont lieu à la fois pendant les périodes de faible activité et pendant les phases éruptives d’un volcan sur l’île de Montserrat, en utilisant des approches infraquotidiennes (époque par époque) de traitement de données GPS. Les données GPS sont obtenues auprès d’UNAVCO pour les stations entourant le volcan de la Soufrière pendant la période d’éruption du 20 mai 2006 et celle de l’automne 2012 (une période d’activité plus faible). L’analyse spectrale par la méthode des moindres carrés a été utilisée pour analyser les périodicités dissimulées parmi les données. Nos résultats démontrent que les périodes infraquotidiennes d’intensité maximale se situent près des composantes de la marée diurnes et semi-diurnes (K1 et K2) avec une amplitude atteignant 5 mm. Numéro de notice : A2014-661 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.5623/cig2014-203 En ligne : https://doi.org/10.5623/cig2014-203 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75357
in Geomatica > vol 68 n° 2 (June 2014) . - pp 107 - 117[article]Unmanned aerial systems for photogrammetry and remote sensing: A review / Ismael Colomina in ISPRS Journal of photogrammetry and remote sensing, vol 92 (June 2014)
[article]
Titre : Unmanned aerial systems for photogrammetry and remote sensing: A review Type de document : Article/Communication Auteurs : Ismael Colomina, Auteur ; P. Molina, Auteur Année de publication : 2014 Article en page(s) : pp 79 - 97 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] drone
[Termes IGN] état de l'art
[Termes IGN] navigation aérienne
[Termes IGN] photogrammétrie aérienne
[Termes IGN] prise de vue aérienne
[Termes IGN] télédétection aérienneRésumé : (Auteur) We discuss the evolution and state-of-the-art of the use of Unmanned Aerial Systems (UAS) in the field of Photogrammetry and Remote Sensing (PaRS). UAS, Remotely-Piloted Aerial Systems, Unmanned Aerial Vehicles or simply, drones are a hot topic comprising a diverse array of aspects including technology, privacy rights, safety and regulations, and even war and peace. Modern photogrammetry and remote sensing identified the potential of UAS-sourced imagery more than thirty years ago. In the last five years, these two sister disciplines have developed technology and methods that challenge the current aeronautical regulatory framework and their own traditional acquisition and processing methods. Navety and ingenuity have combined off-the-shelf, low-cost equipment with sophisticated computer vision, robotics and geomatic engineering. The results are cm-level resolution and accuracy products that can be generated even with cameras costing a few-hundred euros. In this review article, following a brief historic background and regulatory status analysis, we review the recent unmanned aircraft, sensing, navigation, orientation and general data processing developments for UAS photogrammetry and remote sensing with emphasis on the nano-micro-mini UAS segment. Numéro de notice : A2014-290 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2014.02.013 En ligne : https://doi.org/10.1016/j.isprsjprs.2014.02.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33193
in ISPRS Journal of photogrammetry and remote sensing > vol 92 (June 2014) . - pp 79 - 97[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 081-2014061 RAB Revue Centre de documentation En réserve L003 Disponible Laboratory measurements of plant drying: Implications to estimate moisture content from radiative transfer models in two temperate species / Sara Jurdao in Photogrammetric Engineering & Remote Sensing, PERS, vol 80 n° 5 (May 2014)PermalinkOptical signal processor for millimeter-wave interferometric radiometry / Enrique Nova in IEEE Transactions on geoscience and remote sensing, vol 52 n° 5 tome 1 (May 2014)PermalinkPhase quality optimization in polarimetric differential SAR interferometry / Rubén Iglesias in IEEE Transactions on geoscience and remote sensing, vol 52 n° 5 tome 1 (May 2014)PermalinkTowards (re)constructing narratives from georeferenced photographs through visual analytics / Ralph K. Straumann in Cartographic journal (the), vol 51 n° 2 (May 2014)PermalinkUAV shipboard landing with RTK: a carrier phase compensates for wind and wave motion / Chiu-Jung Huang in GPS world, vol 25 n° 5 (May 2014)PermalinkBayesian context-dependent learning for anomaly classification in hyperspectral imagery / Christopher Ratto in IEEE Transactions on geoscience and remote sensing, vol 52 n° 4 (April 2014)PermalinkDynamic modeling of GNSS troposphere wet delay for estimation of precipitable water vapour / Ahmed El-Mowafy in Journal of applied geodesy, vol 8 n° 1 (April 2014)PermalinkHyperspectral-based adaptive matched filter detector error as a function of atmospheric water vapor estimation / Allan W. Yarbrough in IEEE Transactions on geoscience and remote sensing, vol 52 n° 4 (April 2014)PermalinkImpact of signal contamination on the adaptive detection performance of local hyperspectral anomalies / Stefania Matteoli in IEEE Transactions on geoscience and remote sensing, vol 52 n° 4 (April 2014)PermalinkSegmentation d'images aériennes par coopération LPE-régions et LPE-contours, application à la caractérisation de toitures / Youssef El Merabet in Revue Française de Photogrammétrie et de Télédétection, n° 206 (Avril 2014)Permalink