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A new generation of the United States National Land Cover Database : Requirements, research priorities, design, and implementation strategies / Limin Yang in ISPRS Journal of photogrammetry and remote sensing, vol 146 (December 2018)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 146 (December 2018) . - pp 108 - 123 Titre : A new generation of the United States National Land Cover Database : Requirements, research priorities, design, and implementation strategies Type de document : Article/Communication Auteurs : Limin Yang, Auteur ; Suming Jin, Auteur ; Patrick Danielson, Auteur ; Collin Homer, Auteur ; Leila Gass, Auteur ; et al., Auteur Année de publication : 2018 Article en page(s) : pp 108 - 123 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes descripteurs IGN] approche hiérarchique [Termes descripteurs IGN] base de données d'occupation du sol [Termes descripteurs IGN] changement d'occupation du sol [Termes descripteurs IGN] couvert végétal [Termes descripteurs IGN] données multitemporelles [Termes descripteurs IGN] Etats-Unis [Termes descripteurs IGN] historique des données [Termes descripteurs IGN] image Landsat [Termes descripteurs IGN] implémentation (informatique) [Termes descripteurs IGN] modèle numérique de surface de la canopée [Termes descripteurs IGN] zone humide Résumé : (Auteur) The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released four National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, and 2011. These products provide spatially explicit and reliable information on the Nation’s land cover and land cover change. To continue the legacy of NLCD and further establish a long-term monitoring capability for the Nation’s land resources, the USGS has designed a new generation of NLCD products named NLCD 2016. The NLCD 2016 design aims to provide innovative, consistent, and robust methodologies for production of a multi-temporal land cover and land cover change database from 2001 to 2016 at 2–3-year intervals. Comprehensive research was conducted and resulted in developed strategies for NLCD 2016: a streamlined process for assembling and preprocessing Landsat imagery and geospatial ancillary datasets; a multi-source integrated training data development and decision-tree based land cover classifications; a temporally, spectrally, and spatially integrated land cover change analysis strategy; a hierarchical theme-based post-classification and integration protocol for generating land cover and change products; a continuous fields biophysical parameters modeling method; and an automated scripted operational system for the NLCD 2016 production. The performance of the developed strategies and methods were tested in twenty World Reference System-2 path/row throughout the conterminous U.S. An overall agreement ranging from 71% to 97% between land cover classification and reference data was achieved for all tested area and all years. Results from this study confirm the robustness of this comprehensive and highly automated procedure for NLCD 2016 operational mapping. Numéro de notice : A2018-537 Thématique : FORET/GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2018.09.006 date de publication en ligne : 13/09/2018 En ligne : https://doi.org/10.1016/j.isprsjprs.2018.09.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91550 [article]

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Du nuage de points à la représentation 3D avec PostGIS / Tom Van Tilburg in Géomatique expert, n° 113 (novembre - décembre 2016)

Public [article]  inGéomatique expert > n° 113 (novembre - décembre 2016) . - pp 21 - 22 Titre : Du nuage de points à la représentation 3D avec PostGIS Type de document : Article/Communication Auteurs : Tom Van Tilburg, Auteur Année de publication : 2016 Article en page(s) : pp 21 - 22 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes descripteurs IGN] données lidar [Termes descripteurs IGN] données multitemporelles [Termes descripteurs IGN] représentation cartographique 3D [Termes descripteurs IGN] semis de points [Termes descripteurs IGN] stockage de données Résumé : (Auteur) [Introduction] Une fois que les nuages de points sont stockés dans la base de données, comment faire pour les exploiter et en tirer, par exemple, des modèles 3D ? La question est particulièrement importante pour un pays comme les Pays Bas où, tous les six/sept ans, le gouvernement fait réaliser un survol LIDAR complet du territoire et publie un nuage de points classifié d'une densité de huit points par mètre carré. [...] Numéro de notice : A2016-961 Thématique : GEOMATIQUE/IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83621 [article]

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Validation of medium-scale historical maps of southern Latvia for evaluation of impact of continuous forest cover on the present-day mean stand area and tree species richness / Anda Fescenko in Baltic forestry, vol 22 n° 1 ([01/02/2016])  

Public [article]  inBaltic forestry > vol 22 n° 1 [01/02/2016] . - pp 51 - 62 Titre : Validation of medium-scale historical maps of southern Latvia for evaluation of impact of continuous forest cover on the present-day mean stand area and tree species richness Type de document : Article/Communication Auteurs : Anda Fescenko, Auteur ; Martins Lukins, Auteur ; Ilja Fescenko, Auteur Année de publication : 2016 Article en page(s) : pp 51 - 62 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale [Termes descripteurs IGN] analyse multivariée [Termes descripteurs IGN] carte ancienne [Termes descripteurs IGN] continuité géographique [Termes descripteurs IGN] couvert forestier [Termes descripteurs IGN] données multitemporelles [Termes descripteurs IGN] écosystème forestier [Termes descripteurs IGN] feuillu [Termes descripteurs IGN] inventaire forestier étranger (données) [Termes descripteurs IGN] Lettonie [Termes descripteurs IGN] régression [Termes descripteurs IGN] richesse floristique [Termes descripteurs IGN] station forestière [Termes descripteurs IGN] utilisation du sol Résumé : (auteur) Medium-scale historical maps are often the only cartographic source of former forest area distribution on a regional level. In conjunction with a database of the current distribution of species or functional traits, maps may be valuable tool for studying the impact of previous land use on ecosystems. In this study a heterogeneous set of historical maps was used to reconstruct the multi-temporal pattern of the forest area in a moderately forested region (5,180 km2) of southern Latvia during the last 220 years. Changes in the total forest cover were assessed in four time slices and compared with available historical statistical data. To validate the obtained multi-temporal data for ecological studies, the impact of continuous forest cover on the present-day mean stand area and tree species richness derived from the present-day forest inventory database of 94,886 stands was quantified by bivariate and regression analyses. We found no significant impact of inaccuracy of the historical maps on the entire forest continuity pattern of the study area. In particular, the diversity metrics dependencies on the forest continuity can be described by quadratic regression models with coefficients of determination close to one. We also found that the mean stand area is for about 18% larger in woodlands with longer forest continuity irrespective of the forest type. The older woodland the less difference was found between boreal deciduous and nemoral deciduous forests in terms of tree species richness. Numéro de notice : A2016--096 Thématique : FORET/GEOMATIQUE Nature : Article En ligne : https://www.balticforestry.mi.lt/bf/PDF_Articles/2016-22%5b1%5d/e-Baltic%20Fores [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84649 [article]

Multitemporal fluctuations in L-Band Backscatter from a japanese forest / Manabu Watanabe in IEEE Transactions on geoscience and remote sensing, vol 53 n° 11 (November 2015)

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 53 n° 11 (November 2015) . - pp 5799 - 5813 Titre : Multitemporal fluctuations in L-Band Backscatter from a japanese forest Type de document : Article/Communication Auteurs : Manabu Watanabe, Auteur ; Takeshi Motohka, Auteur ; Tomohiro Shiraishi, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 5799 - 5813 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes descripteurs IGN] bande L [Termes descripteurs IGN] biomasse forestière [Termes descripteurs IGN] coefficient de rétrodiffusion [Termes descripteurs IGN] constante diélectrique [Termes descripteurs IGN] données multitemporelles [Termes descripteurs IGN] forêt [Termes descripteurs IGN] image ALOS [Termes descripteurs IGN] image radar moirée [Termes descripteurs IGN] Japon Résumé : (Auteur) The temporal variations (diurnal and annual) in arboreal (εTree) and bare soil (εSoil) dielectric constants and their correlation with precipitation were examined for several trees in Japan. A significant (1 σ (standard deviation) and 2 σ) εTree increase is observed after rainfall at 89.8% and 90.5% probability. However, rainfall does not always induce significant εTree increases. Rainfall of more than 5 mm/day can induce 1 σ εTree Tree increase at a 59.6% probability. In order to examine whether the increase in εTree affects the L-band σ0 variation in a forest, the four-year temporal variation of the L-band backscattering coefficient (σ0) was estimated from observations by the Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture Radar. Observed maximum absolute deviations from the mean over the forest area were 1.0 and 1.2 dB for σHH0 and σHV0, respectively, and 4.0 and 3.0 dB over open land. σ0 and rainfall correlations show that εTree and σForest0 are proportional to precipitation integrated over seven or eight days; εSoil and σOpen land0 are proportional to precipitation integrated over three days. This finding indicates that εTree variations influence σForest areas0. A stronger correlation between σHV0 and precipitation is observed in several sites with low σHV0, where less biomass is expected, and several sites with high σHV0, where more biomass is expected. A weaker correlation between σHV0 and precipitation is observed for several sites with high σ- sub>HV0. These differences may be explained by the different contributions of double bounce scattering and potential transpiration, which is a measure of the ability of the atmosphere to remove water from the surface through the processes of transpiration. The two other results were as follows: 1) The functional relation between aboveground biomass and σ0 showed dependence on precipitation data, this being an effect connected with seasonal changes of the εTree. This experiment reinforces the fact that the dry season is preferable for retrieval of woody biomass from inversion of the functional dependence of SAR backscatter and for avoiding the influence of rainfall. 2) The complex dielectric constant for a tree trunk, which is measured between 0.2 and 6 GHz, indicates that free water is dominant in the measured tree. Numéro de notice : A2015-774 Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78832 [article]

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Editorial Theme Issue "Multitemporal remote sensing data analysis" / Clément Mallet in ISPRS Journal of photogrammetry and remote sensing, vol 107 (September 2015)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 107 (September 2015) . - pp 1 - 2 Titre : Editorial Theme Issue "Multitemporal remote sensing data analysis" Type de document : Article/Communication Auteurs : Clément Mallet , Auteur ; Nesrine Chehata , Auteur ; Grégoire Mercier, Auteur Année de publication : 2015 Article en page(s) : pp 1 - 2 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Télédétection [Termes descripteurs IGN] analyse de données [Termes descripteurs IGN] détection de changement [Termes descripteurs IGN] données multitemporelles [Termes descripteurs IGN] données spatiotemporelles Résumé : (auteur) [début] The remote sensing and photogrammetric community has witnessed significant evolution during the last decade and is facing today a new paradigm in data processing and analysis. Indeed, the development of new satellite remote sensing missions leads to an increasing amount of multi-temporal data, with improved spatial, spectral, and temporal resolutions, available at various scales (Berger and Aschbacher, 2012; Belward and Skøien, 2015). In parallel, data becomes available for free, often through dedicated infrastructures, with the opening of satellite and aerial image archives (Landsat and Spot World Heritage, Sentinel missions (Wulder and Coops, 2014)) and with the growing power of benchmark contests, more focused on very high resolution data provision (Benedek and Szirányi, 2009; Rottensteiner et al., 2014; Vallet et al., 2015) or on data fusion (Debes et al., 2014). Consequently, it has never been so easy to collect multiple observations for large areas of the Earth’s surface, which has significantly raised the interest of the scientific community and permitted the development of innovative methods for handling and analysing temporal series of (multimodal) datasets (Bovolo et al., 2013). Numéro de notice : A2015--063 Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 1016/j.isprsjprs.2015.07.005 En ligne : http://dx.doi.org/10.1016/j.isprsjprs.2015.07.005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83527 [article]

TerraSAR-X dual-pol time-series for mapping of wetland vegetation / Julie Betbeder in ISPRS Journal of photogrammetry and remote sensing, vol 107 (September 2015)  

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vol 107 - September 2015 - Multitemporal remote sensing data analysis (Bulletin de ISPRS Journal of photogrammetry and remote sensing) / Clément Mallet  

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Urbanization of the United States over two centuries: an approach based on a long-term database (1790–2010) / Anne Bretagnolle in International journal of geographical information science IJGIS, vol 29 n° 5 (May 2015)  

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Vegetation Burn Severity Mapping Using Landsat-8 and WorldView-2 / Zhuoting Wu in Photogrammetric Engineering & Remote Sensing, PERS, vol 81 n° 2 (February 2015)

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Classification and change detection in multi - epoch airborne laser scanning point clouds / Sudan Xu (2015)    

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Multi-temporal optical VHR image fusion for land-cover mapping / Mathias Paget (2015)  

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Semisupervised manifold alignment of multimodal remote sensing images / Devis Tuia in IEEE Transactions on geoscience and remote sensing, vol 52 n° 12 (December 2014)

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Description des états annuels et des évolutions de la couverture végétale observée par des séries temporelles d’images MODIS dans le parc national de Hwange (Zimbabwe) / Elodie Buard in Revue Française de Photogrammétrie et de Télédétection, n° 207 (Juillet 2014)

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Comparing seven candidate mission configurations for temporal gravity field retrieval through full-scale numerical simulation / Basem Elsaka in Journal of geodesy, vol 88 n° 1 (January 2014)  

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Utilisation de la corrélation d’images dans les géosciences / Boris Leroux (2014) 

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