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A Swedish case study on the prediction of detailed product recovery from individual stem profiles based on airborne laser scanning / Andreas Barth in Annals of Forest Science, vol 72 n° 1 (January 2015)
[article]
Titre : A Swedish case study on the prediction of detailed product recovery from individual stem profiles based on airborne laser scanning Type de document : Article/Communication Auteurs : Andreas Barth, Auteur ; Johan Möller, Auteur ; Lars Wilhelmsson, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 47 - 56 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] gestion prévisionnelle
[Termes IGN] inventaire forestier (techniques et méthodes)
[Termes IGN] Suède
[Termes IGN] télémétrie laser aéroporté
[Termes IGN] troncRésumé : (auteur) Context : Improved and cost-efficient predictions of detailed product recovery from logging operations may increase efficiency and improve value chains based on modern cut-to-length harvesting (CTL).
Aims : The objective of this study was to investigate and evaluate the use of individual tree data estimates from two inventory techniques: (a) established airborne laser scanner inventory (ALS case) and (b) traditional field inventory (BAU case) for predicting product recovery in a Swedish case study.
Methods : Statistics from previous harvester production files within the region were used to generate realistic levels of simulated stem defects. Bucking simulations were performed to optimise log products according to stem profiles, stem defects, and an operational price list expressing the demand of the industry customer. All simulation results at the stand level were compared to operational harvester production data that were used to provide an accurate measure of the ‘true’ product recovery. The total harvested area was 139 ha including 16 forest stands. Seven groups of log products were included in the analysis. The predicted versus real top diameter distributions of sawlogs were evaluated using an error index to express deviations.
Results : At the stand level, the average error index values were 0.15 and 0.18 for the ALS and BAU approaches, respectively. As a consequence of an overall bias of the ALS tree lists the opposite was found at the total wood flow level, with the field-based data yielding a lower error index.
Conclusions : The volume predictions for different log product groups were slightly more accurate in the ALS case than in the BAU case.Numéro de notice : A2015-381 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article DOI : 10.1007/s13595-014-0400-6 Date de publication en ligne : 13/08/2014 En ligne : https://doi.org/10.1007/s13595-014-0400-6 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76870
in Annals of Forest Science > vol 72 n° 1 (January 2015) . - pp 47 - 56[article]Measurements of forest biomass change using P-Band synthetic aperture radar backscatter / Gustaf Sandberg in IEEE Transactions on geoscience and remote sensing, vol 52 n° 10 tome 1 (October 2014)
[article]
Titre : Measurements of forest biomass change using P-Band synthetic aperture radar backscatter Type de document : Article/Communication Auteurs : Gustaf Sandberg, Auteur ; Lars M.H. Ulander, Auteur ; Jörgen Wallerman, Auteur ; et al., Auteur Année de publication : 2014 Article en page(s) : pp 6047 - 6061 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection
[Termes IGN] analyse diachronique
[Termes IGN] bande P
[Termes IGN] biomasse
[Termes IGN] détection de changement
[Termes IGN] données laser
[Termes IGN] forêt boréale
[Termes IGN] radar à antenne synthétique
[Termes IGN] rétrodiffusion
[Termes IGN] Suède
[Termes IGN] télédétection en hyperfréquenceRésumé : (Auteur) Methods to estimate forest biomass change have been investigated using experimental P-band synthetic aperture radar (SAR) data from the recent airborne campaigns BioSAR 2007 and BioSAR 2010 conducted over a hemiboreal test site in southern Sweden. Regression models based on backscatter change were developed using reference biomass change maps derived from high-density laser scanning data. Different regression models were developed for linear, square root, and logarithmic biomass change scales. The models were compared to the change maps based on laser data using twofold cross-validation, and estimation errors were evaluated using six 80 m by 80 m plots with detailed in situ measurements. The results indicate that the root-mean-square error of biomass change estimates based on P-band SAR backscatter data is about 15% or 20 t/ha. This suggests that not only clear-cuts but also growth and thinning can be measured. Simulations were performed in order to evaluate the possibility of using a spaceborne P-band SAR for measurements of forest biomass change. The simulations show that, with 64 equivalent number of looks (ENL) and a 50% change in biomass, it is possible to correctly indicate whether the forest has gained or lost biomass. Similarly, for a biomass loss of more than 75%, a correct indication of the sign of biomass change can be achieved with only 8 ENL. Numéro de notice : A2014-479 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2294684 En ligne : https://doi.org/10.1109/TGRS.2013.2294684 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=74060
in IEEE Transactions on geoscience and remote sensing > vol 52 n° 10 tome 1 (October 2014) . - pp 6047 - 6061[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2014101A RAB Revue Centre de documentation En réserve L003 Disponible Spatial modeling of the black death in Sweden / Lars Skog in Transactions in GIS, vol 17 n° 4 (August 2013)
[article]
Titre : Spatial modeling of the black death in Sweden Type de document : Article/Communication Auteurs : Lars Skog, Auteur ; Hans Hauska, Auteur Année de publication : 2013 Article en page(s) : pp 589 - 611 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse diachronique
[Termes IGN] analyse spatiale
[Termes IGN] carte thématique
[Termes IGN] épidémie
[Termes IGN] maladie infectieuse
[Termes IGN] modélisation spatiale
[Termes IGN] quatorzième siècle
[Termes IGN] santé
[Termes IGN] Suède
[Termes IGN] système d'information géographique
[Termes IGN] Web Map ServiceRésumé : (Auteur) The purpose of this work is to determine whether spatial modeling can be used to model the spread of the Black Death. The study is limited to models for the propagation of the disease in Sweden in 1350. Geographic data of Swedish water bodies and medieval road networks, historical data on the population in Swedish parishes, including their medieval boundaries, along with historical notes and disease characteristics, were used to build alternative models for spatial distribution. Three different models are presented: one radial, one cost-based and one combining network analysis and radial propagation. Simulations were made to depict different scenarios on the spread of the disease, as well as the drastic changes in the overall population of Sweden, over a couple of hundred years. For purpose of validation the population decrease estimated in each parish is compared with independent historical documents. Results from model scenarios are visualized in maps of propagation, animated video sequences and a web map service. Our analyses clearly demonstrate the power of spatial analysis and geographic information systems to describe, model and visualize epidemiologic processes in space and time. Numéro de notice : A2013-473 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01369.x Date de publication en ligne : 02/01/2013 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01369.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32611
in Transactions in GIS > vol 17 n° 4 (August 2013) . - pp 589 - 611[article]3D online: Crowdsourcing for city planning / E. Jeansson in GIM international, vol 26 n° 12 (December 2012)
[article]
Titre : 3D online: Crowdsourcing for city planning Type de document : Article/Communication Auteurs : E. Jeansson, Auteur ; E. Tellden, Auteur ; K. Farmanbar, Auteur Année de publication : 2012 Article en page(s) : pp 28 - 31 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique web
[Termes IGN] aménagement urbain
[Termes IGN] données localisées des bénévoles
[Termes IGN] participation du public
[Termes IGN] planification urbaine
[Termes IGN] production participative
[Termes IGN] SIG participatif
[Termes IGN] Suède
[Termes IGN] système d'information géographique
[Termes IGN] villeRésumé : (Auteur) City planning is a complex process of combining various aspects and analysing the impact of changes in order to create a sustainable city. It involves the municipality, politicians, external stakeholders and, not least, citizens themselves. The potential cost of planning mistakes or late changes to project underlines the need for efficient communication, both within project teams and to external stakeholders. Meanwhile, the importance of citizen's support and involvement is still underestimated in city planning. This article examines how several Swedish cities are encouraging public involvement through crowdsoucing. Numéro de notice : A2012-660 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article DOI : sans En ligne : http://www.gim-international.com/issues/ Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32106
in GIM international > vol 26 n° 12 (December 2012) . - pp 28 - 31[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 061-2012121 RAB Revue Centre de documentation En réserve L003 Disponible Modelling flow routing in permafrost landscapes with TWI: an evaluation against site-specific wetness measurements / A. Persson in Transactions in GIS, vol 16 n° 5 (October 2012)
[article]
Titre : Modelling flow routing in permafrost landscapes with TWI: an evaluation against site-specific wetness measurements Type de document : Article/Communication Auteurs : A. Persson, Auteur ; A. Hasan, Auteur ; J. Tang, Auteur ; Petter Pilesjö, Auteur Année de publication : 2012 Article en page(s) : pp 701 - 713 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] changement climatique
[Termes IGN] dégel
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] humidité du sol
[Termes IGN] modèle numérique de surface
[Termes IGN] pergélisol
[Termes IGN] Suède
[Termes IGN] tourbeRésumé : (Auteur) In northern peatlands the thawing of permafrost increasing the active layer depth and changing the hydrology may lead to feedbacks in the climate system through changes in the biogeochemistry of carbon. We are examining this association on the Stordalen peatland complex in subarctic Sweden by analyzing a DEM derived from LiDAR-data and the calculated TWI [Topographical Wetness Index]. The DEM, with a spatial resolution of 1 m, and the TWI are evaluated against two seasons of water level measurements from 30 sites in the peatland. The TWI is calculated with a form-based flow routing algorithm which produces a natural flow routing pattern. In permafrost wetlands the topography is the major driver and is very important even though its magnitude is low. Site-specific wetness (SSW) measurements from the sites were compared with the different peatland types that occur in the study area, i.e. fen, internal fen and palsa. The results showed a strong correlation between the TWI and the palsa. The TWI was better at describing general patterns than site-specific hydrology. The evaluation of spatial patterns of TWI against SSW reveal the resolution required to develop the technique to be useful for climate change studies. Numéro de notice : A2012-520 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/j.1467-9671.2012.01338.x Date de publication en ligne : 22/08/2012 En ligne : https://doi.org/10.1111/j.1467-9671.2012.01338.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31966
in Transactions in GIS > vol 16 n° 5 (October 2012) . - pp 701 - 713[article]Automatic symbolisation methods for geoportals / Ara Toomanian in Cartographic journal (the), vol 49 n° 2 (May 2012)PermalinkIndividual tree biomass equations or biomass expansion factors for assessment of carbon stock changes in living biomass: A comparative study / Hans Petersson in Forest ecology and management, vol 270 (April 2012)PermalinkSwedish Lidar Project: New Nationwide Elevation Model / Y. Petersen in GIM international, vol 25 n° 2 (February 2011)PermalinkUsing landscape characteristics to define an adjusted distance metric for improving kriging interpolations / S. Lyon in International journal of geographical information science IJGIS, vol 24 n° 5-6 (may 2010)PermalinkInventorying management status and plant species richness in seminatural grasslands using high spatial resolution imagery / K. Hall in Applied Vegetation Science, vol 13 n° 2 (April 2010)PermalinkElmia Wood : tendances et petit matériel in Le Bois International : l'officiel du bois [édition verte], vol 2009 n° 25 (4 juillet 2009)PermalinkPorteurs et abatteuses : les nouveautés à Elmia Wood in Le Bois International : l'officiel du bois [édition verte], vol 2009 n° 24 (27 juin 2009)PermalinkGIS modeling of wave exposure at the seabed: a depth-attenuated wave exposure model / T. Bekkby in Marine geodesy, vol 31 n° 2 (June - September 2008)PermalinkSpecies identification of individual trees by combining high resolution LiDAR data with multi-spectral images / Johan Holmgren in International Journal of Remote Sensing IJRS, vol 29 n° 5 (March 2008)PermalinkQuelques instituts géographiques européens / Françoise de Blomac in SIG la lettre, n° 92 (décembre 2007)PermalinkLes forêts suédoises dans la première moitié du XIXe siècle : ressources naturelles, sylviculture et activités économiques / Jérôme Justeau in Revue forestière française, vol 59 n° 2 (mars - avril 2007)PermalinkEuropean property information, EULIS: removing barriers to cross-border lending / J. Atkey in GIM international, vol 20 n° 7 (July 2006)PermalinkMapping Lake CDOM [coloured dissolved organic matter] by satellite remote sensing / T. 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