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Polarimetric radar vegetation index for biomass estimation in desert fringe ecosystems / Jisung Geba Chang in IEEE Transactions on geoscience and remote sensing, vol 56 n° 12 (December 2018)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 56 n° 12 (December 2018) . - pp 7102 - 7108 Titre : Polarimetric radar vegetation index for biomass estimation in desert fringe ecosystems Type de document : Article/Communication Auteurs : Jisung Geba Chang, Auteur ; Maxim Shoshany, Auteur ; Yisok Oh, Auteur Année de publication : 2018 Article en page(s) : pp 7102 - 7108 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] allométrie [Termes IGN] bande C [Termes IGN] bande L [Termes IGN] bassin méditerranéen [Termes IGN] biomasse [Termes IGN] carte de la végétation [Termes IGN] coefficient de rétrodiffusion [Termes IGN] données de terrain [Termes IGN] image ALOS-PALSAR [Termes IGN] image Sentinel-SAR [Termes IGN] indice de végétation [Termes IGN] polarimétrie radar [Termes IGN] zone aride [Termes IGN] zone semi-aride Résumé : (auteur) Biomass estimation of eastern Mediterranean shrublands was investigated using PALSAR full- and dual-polarization L-band and Sentinel-1 dual-polarization C-band data. First, we conducted an empirical assessment of single and multiple regressions between polarized backscattering coefficients and shrubland biomass distribution along the climatic gradient between semiarid and arid regions. We then found that the PALSAR L-band HV-polarized backscattering coefficient has higher biomass information content than Sentinel-1 C-band data. Based on a theoretical volume scattering model and a semiempirical model, we propose a new polarimetric radar vegetation index (PRVI) that utilizes the degree of polarization and the cross-polarized backscattering coefficient. The relationship between the new index and the biomass was assessed with reference to normalized difference vegetation index-based biomass estimates calculated using Landsat imagery. The PRVI was found to have higher correlation with biomass compared with other radar polarization parameters, in general, and an existing radar vegetation index (RVI), in particular. Assessment of PRVI-based biomass predictions compared with allometric data extracted from air photographs, Lidar, and field data for 67 sites across the desert fringe zone indicated moderate performance with an RMSE of 0.329 kg/m 2 , while an RVI-based biomass estimation had an RMSE of 0.439 kg/m². Numéro de notice : A2018-553 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2018.2848285 Date de publication en ligne : 03/07/2018 En ligne : http://dx.doi.org/10.1109/TGRS.2018.2848285 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91659 [article]

Evolution of clusters in dynamic point patterns: with a case study of ants' simulation / Maxim Shoshany in International journal of geographical information science IJGIS, vol 21 n° 6-7 (july 2007)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 21 n° 6-7 (july 2007) . - pp 777 - 797 Titre : Evolution of clusters in dynamic point patterns: with a case study of ants' simulation Type de document : Article/Communication Auteurs : Maxim Shoshany, Auteur ; A. Even-Paz, Auteur ; Shlomo Bekhor, Auteur Année de publication : 2007 Article en page(s) : pp 777 - 797 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] Insecta [Termes IGN] programmation linéaire [Termes IGN] regroupement de points [Termes IGN] SIG dynamique [Termes IGN] simulation Résumé : (Auteur) Recent developments in sensing and tracking technologies have enabled large geographical databases to be established that represent spatial dynamics of 'behavioral entities'. Within this type of dynamics there are several levels and modes of organization that need to be revealed. Clusters are high-level groupings of entities, where change in their location and form, including split and merge events, represents self-organization and functioning patterns. Such information may contribute for better understanding spatially complex dynamic patterns. The main objective of this article is to develop an adaptable methodology that facilitates exploration of spatial order and processes in point pattern dynamics. The approach presented here utilizes data-clustering at each snapshot of the moving pattern, and then involves pairwise linking between the clusters identified at each snapshot and those identified in the following snapshot. Such linking is based on a new methodology that defines well globally optimized solutions for numerous possible linking combinations based on Linear Programming. A preliminary assessment of the approach was conducted with an existing Ants' simulation tool, capable of creating data sets covering in detail a substantial portion of the nest's life cycle. Copyright Taylor & Francis Numéro de notice : A2007-271 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/13658810601169881 En ligne : https://doi.org/10.1080/13658810601169881 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28634 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-07041	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-07042	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Secondary reflection effect on sensor response for a v-shaped valley / Maxim Shoshany in International Journal of Remote Sensing IJRS, vol 10 n° 7 (July 1989)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 10 n° 7 (July 1989) . - pp 1197 - 1206 Titre : Secondary reflection effect on sensor response for a v-shaped valley Type de document : Article/Communication Auteurs : Maxim Shoshany, Auteur Année de publication : 1989 Article en page(s) : pp 1197 - 1206 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur (télédétection) [Termes IGN] réflexion (rayonnement) [Termes IGN] réponse spectrale [Termes IGN] simulation [Termes IGN] vallée Numéro de notice : A1989-197 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168908903958 En ligne : https://doi.org/10.1080/01431168908903958 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25157 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-89061	RAB	Revue	Centre de documentation	En réserve L003	Disponible