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Pan-tropical hinterland forests: mapping minimally disturbed forests / Alexandra Tyukavina in Global ecology and biogeography, vol 25 n° 2 (February 2016)
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Titre : Pan-tropical hinterland forests: mapping minimally disturbed forests Type de document : Article/Communication Auteurs : Alexandra Tyukavina, Auteur ; Matthew C. Hansen, Auteur ; P.V. Potapov, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 151 - 163 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse spatio-temporelle
[Termes IGN] carte forestière
[Termes IGN] dégradation de la flore
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] forêt tropicale
[Termes IGN] image LandsatRésumé : (auteur) Aim : Tropical forest degradation is a significant source of carbon emissions due to selective logging, fragmentation and other disturbance factors. However, methods for mapping and monitoring pan-tropical forest degradation are still in their infancy. Here we present a new and automated approach to differentiate forests likely to be affected by degradation dynamics from more structurally intact forests, referred to as hinterland forests.
Location : Pan-tropical.
Methods : Inputs required for hinterland forest mapping include the extent of the initial forest cover and subsequent forest cover loss data, in this case global-scale Landsat-derived tree cover and stand-replacement disturbance maps. User-defined parameters employed to generate the extent and change of hinterland forest include: (1) minimum size of hinterland forest patch, (2) minimum corridor width, (3) distance from disturbance, and (4) extant history.
Results : Hinterland forest extent was mapped using forest cover loss data from 2000 to 2012 and hinterland forest loss was quantified from 2007 to 2013. Lidar-modelled forest height data were shown to be different within and outside hinterland forests, demonstrating the biophysical basis of the hinterland concept in discriminating likely degradation. Overall, hinterland forests experienced an 18% decline from 2007 to 2013. Regional variation in hinterland forest extent and loss was high. Data on 2013 pan-tropical hinterland forest extent can be downloaded from http://glad.geog.umd.edu/hinterland/index.html and viewed online at http://earthenginepartners.appspot.com/science-2013-global-forest.
Main conclusions : The largest extent of hinterland forests and of hinterland forest loss was found in Latin America, followed by Africa and Southeast Asia, respectively. The highest proportional loss of hinterland forest occurred in Southeast Asia, followed by Africa and Latin America, respectively. Nearly 95% of all 2013 hinterland forests were found in 17 of the 69 tropical forest countries studied. The extent and loss of hinterland forest can be an input to national monitoring and management programmes focused on forest carbon stocks, biodiversity conservation and other ecosystem services.Numéro de notice : A2016--199 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1111/geb.12394 En ligne : http://dx.doi.org/10.1111/geb.12394 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80340
in Global ecology and biogeography > vol 25 n° 2 (February 2016) . - pp 151 - 163[article]Perception de l’ambiance sonore d’un lieu selon sa représentation visuelle : une analyse de corpus / Laura Ascone in Corela, vol 14 n° 1 (Février 2016)
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Titre : Perception de l’ambiance sonore d’un lieu selon sa représentation visuelle : une analyse de corpus Type de document : Article/Communication Auteurs : Laura Ascone, Auteur ; Catherine Dominguès , Auteur ; Julien Longhi, Auteur
Année de publication : 2016 Note générale : bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] analyse de données
[Termes IGN] bruit (audition)
[Termes IGN] carte
[Termes IGN] corpus
[Termes IGN] enquête
[Termes IGN] orthoimage
[Termes IGN] perception
[Termes IGN] photographie
[Termes IGN] représentation
[Termes IGN] traitement du langage naturelRésumé : (auteur) This study investigates the way the visual representation of a place influences its acoustic atmosphere’s perception and description. This analysis is based on a survey aiming at contrasting four different representations (supports): a captioned map, an ortophoto, a collection of pictures, and a map accompanied by pictures. The answers were transcribed and constituted four sub-corpus (one per support) on which a discursive analysis was conducted. Different semantic categories were established. They refer to the spotting of visual elements, the inferences between these visual elements and the acoustic atmosphere, and the speaker’s subjectivity. A statistical analysis of the words constituting these categories was conducted in order to contrast the use of the categories according to the support. This analysis revealed that this use depends on the support and that the acoustic atmosphere’s description and perception vary according to the visual representation. Numéro de notice : A2016--092 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueNat DOI : 10.4000/corela.4550 Date de publication en ligne : 15/06/2016 En ligne : https://doi.org/10.4000/corela.4550 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84617
in Corela > vol 14 n° 1 (Février 2016)[article]SGM-based seamline determination for urban orthophoto mosaicking / Shiyan Pang in ISPRS Journal of photogrammetry and remote sensing, vol 112 (February 2016)
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Titre : SGM-based seamline determination for urban orthophoto mosaicking Type de document : Article/Communication Auteurs : Shiyan Pang, Auteur ; Mingwei Sun, Auteur ; Xiangyun Hu, Auteur ; Zuxun Zhang, Auteur Année de publication : 2016 Article en page(s) : pp 1 – 12 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] appariement semi-global
[Termes IGN] classification pixellaire
[Termes IGN] géométrie épipolaire
[Termes IGN] mosaïquage d'images
[Termes IGN] orthoimage
[Termes IGN] orthophotocarte
[Termes IGN] raccord d'images
[Termes IGN] seuillage d'image
[Termes IGN] zone urbaineRésumé : (auteur) Mosaicking is a key step in the production of digital orthophoto maps (DOMs), especially for large-scale urban orthophotos. During this step, manual intervention is commonly involved to avoid the case where the seamline crosses obvious objects (e.g., buildings), which causes geometric discontinuities on the DOMs. How to guide the seamline to avoid crossing obvious objects has become a popular topic in the field of photogrammetry and remote sensing. Thus, a new semi-global matching (SGM)-based method to guide seamline determination is proposed for urban orthophoto mosaicking in this study, which can greatly eliminate geometric discontinuities. The approximate epipolar geometry of the orthophoto pairs is first derived and proven, and the approximate epipolar image pair is then generated by rotating the two orthorectified images according to the parallax direction. A SGM algorithm is applied to their overlaps to obtain the corresponding pixel-wise disparity. According to a predefined disparity threshold, the overlap area is identified as the obstacle and non-obstacle areas. For the non-obstacle regions, Hilditch thinning algorithm is used to obtain the skeleton line, followed by Dijkstra’s algorithm to search for the optimal path on the skeleton network as the seamline between two orthophotos. A whole seamline network is constructed based on the strip information recorded in flight. In the experimental section, the approximate epipolar geometric theory of the orthophoto is first analyzed and verified, and the effectiveness of the proposed method is then validated by comparing its results with the results of the geometry-based, OrthoVista, and orthoimage elevation synchronous model (OESM)-based methods. Numéro de notice : A2016-135 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.11.007 En ligne : https://doi.org/10.1016/j.isprsjprs.2015.11.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80304
in ISPRS Journal of photogrammetry and remote sensing > vol 112 (February 2016) . - pp 1 – 12[article]Telespazio aurait-il trouvé la solution pour développer l'usage du spatial / Françoise de Blomac in DécryptaGéo le mag, n° 174 (février 2016)
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Titre : Telespazio aurait-il trouvé la solution pour développer l'usage du spatial Type de document : Article/Communication Auteurs : Françoise de Blomac, Auteur Année de publication : 2016 Article en page(s) : pp 16 - 17 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] acquisition de données
[Termes IGN] carte thématique
[Termes IGN] drone
[Termes IGN] image optique
[Termes IGN] image radar
[Termes IGN] image spatiale
[Termes IGN] surveillance de la végétation
[Termes IGN] surveillance du littoral
[Termes IGN] traitement de données localiséesRésumé : (auteur) Démocratiser l'imagerie satellitaire ? Tout le monde en rêve mais beaucoup s'y cassent les dents. Nicolas Vincent, vice-président de Téléspazio France, nous explique comment son entreprise a développé EarthLab, un réseau de bouquets de services exploitant la géo-information. En misant sur la dimension industrielle, le spécialiste du radar est -il en train de réussir là où beaucoup ont échoué ? Numéro de notice : A2016-052 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79648
in DécryptaGéo le mag > n° 174 (février 2016) . - pp 16 - 17[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 286-2016021 RAB Revue Centre de documentation En réserve L003 Disponible Use of GIS-supported comparative cartography and historical maps in long-term forest cover changes analysis in the Holy cross mountains (Poland) / Tadeusz Ciupa in Baltic forestry, vol 22 n° 1 ([01/02/2016])
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Titre : Use of GIS-supported comparative cartography and historical maps in long-term forest cover changes analysis in the Holy cross mountains (Poland) Type de document : Article/Communication Auteurs : Tadeusz Ciupa, Auteur ; Roman Suligowski, Auteur ; Grzegorz Walek, Auteur Année de publication : 2016 Article en page(s) : pp 63 - 73 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse comparative
[Termes IGN] analyse diachronique
[Termes IGN] carte thématique
[Termes IGN] couvert forestier
[Termes IGN] dix-neuvième siècle
[Termes IGN] géoréférencement
[Termes IGN] MNS SRTM
[Termes IGN] Pologne
[Termes IGN] vectorisation
[Termes IGN] vingtième siècleRésumé : (auteur) In recent years, forest research benefits from access to archived cartographic materials and geographic information systems technology, which both allow to analyze the processes of forest cover changes over time. Available digital elevation models (DEMs) and soil maps make it possible to consider terrain relief and soils characteristics in the research. The present paper analyzes changes of forest cover in the Holy Cross Mountains (central Poland) within the period of 1800–2011 and they relation to altitude and slope gradient classes as well as to genetic soil groups. The source materials consist of topographic maps created in 1800, 1900, 1930, 1983 and thematic maps: Polish Sozological Map in 1: 50,000 scale from 2011, Soil Map of Poland in 1: 300,000 scale and SRTM3 digital elevation model. Scanned maps were georeferenced to metric coordinate system and then forest areas were digitalized by on-screen vectorization. Digital elevation model was used to delineate elevation and slope gradient classes. Finally, the overlay geoprocessing methods were used to analyze the areas of forest cover changes in time, also in addition to altitude zones, slope gradient and genetic soil type classes. Forest cover indicator (%) and mean annual index of forest cover change (ha•year-1) have been calculated. Forest cover was the highest at the beginning of the study period in 1800 and the lowest in 1930. The decrease in forest cover in this period equaled 35.3 %. A slow process of recovery began in 1930 and continues till today. However, the coverage noted in 1800 has not yet been achieved. Also forest cover stability analysis has been performed. Today forest areas of very high stability cover about 21% of the Holy Cross Mountains and 49% of the area covered by trees in 1800. The present analysis has been performed with the use of GIS-supported comparative cartography and historical maps, which have significantly improved the investigations of long-term forest cover changes. Numéro de notice : A2016--097 Affiliation des auteurs : non IGN Thématique : FORET/GEOMATIQUE Nature : Article DOI : sans 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=84650
in Baltic forestry > vol 22 n° 1 [01/02/2016] . - pp 63 - 73[article]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])
PermalinkAcquisition et reconstruction de données 3D denses sous-marines en eau peu profonde par des robots d'exploration / Loïca Avanthey (2016)
PermalinkAn assessment of image features and random forest for land cover mapping over large areas using high resolution Satellite Image Time Series / Charlotte Pelletier (2016)
PermalinkAn interactive system for intrinsic validation of citizen science data for species distribution mapping and modelling applications / Hossein Vahidi (2016)
PermalinkApport de la télédétection radar satellitaire pour la cartographie de la forêt des Landes / Yousra Hamrouni (2016)
PermalinkAutomatisation des processus de création d’atlas dynamique et interactif développé pour internet / Victoire Marlet (2016)
PermalinkPermalinkCartographie à grande échelle des habitats de la faune sauvage et évaluation / Alexia Dublanche (2016)
PermalinkPermalinkA comparative study of existing multi-scale maps: what content at which scale? / Marion Dumont (2016)
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PermalinkPermalinkLe contentieux frontalier terrestre franco-surinamien ou Contesté du Maroni, 1. Mémoire / Godefroy Garon (2016)
PermalinkLe contentieux frontalier terrestre franco-surinamien ou Contesté du Maroni, 2. Dossier d'annexes / Godefroy Garon (2016)
PermalinkDetection and labeling of sensitive areas in hydrological cartography using vector statistics / Elia Quirós in IEEE Transactions on geoscience and remote sensing, vol 54 n° 1 (January 2016)
PermalinkDéveloppement d’un outil de webmapping pour l’optimisation de l’offre de soins en dialyse / Clémentine Chasles (2016)
PermalinkEnvironnement, santé, territoire : le tryptique d'avenir / Françoise de Blomac in DécryptaGéo le mag, n° 173 (janvier 2016)
PermalinkEst-il possible de caractériser l’état du réseau fluvial à une échelle régionale à partir de cartes topographiques ? / Samuel Dunesme (2016)
PermalinkLocalisation à base d’amers visuels : Cartographie et mise en correspondance de marquages au sol et intégration dans LBA / Bahman Soheilian (2016)
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