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Reintroduction of the European bison (Bison bonasus) in central-eastern Europe: a case study / Cathlin M. Lord in International journal of geographical information science IJGIS, vol 34 n° 8 (August 2020)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 34 n° 8 (August 2020) . - pp 1628 - 1647 Titre : Reintroduction of the European bison (Bison bonasus) in central-eastern Europe: a case study Type de document : Article/Communication Auteurs : Cathlin M. Lord, Auteur ; Kylie P. Wirebach, Auteur ; Jennifer Tompkins, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : pp 1628 - 1647 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes descripteurs IGN] analyse multicritère [Termes descripteurs IGN] analyse spatiale [Termes descripteurs IGN] biodiversité [Termes descripteurs IGN] combinaison linéaire ponderée [Termes descripteurs IGN] écosystème [Termes descripteurs IGN] Europe centrale [Termes descripteurs IGN] faune [Termes descripteurs IGN] habitat animal [Termes descripteurs IGN] Lettonie [Termes descripteurs IGN] politique de conservation (biodiversité) [Termes descripteurs IGN] Pologne [Termes descripteurs IGN] population animale [Termes descripteurs IGN] processus d'analyse hiérarchisée Résumé : (auteur) European bison (Bison bonasus), a flagship species for the burgeoning re-wildling movement, faced challenges common to large mammals globally. These include deforestation, land use conversion, poaching, and a lack of genetic diversity. Despite these limitations, organizations such as Rewilding Europe seek to reintroduce the species to its historic range. This study focused on finding suitable reintroduction locations for a population of at least 120 individuals. Through GIS-based multi-criteria decision-making using weighted linear combination and analytical hierarchy process, a model based on known bison habitat preferences, human-centered habitat constraints, and surface geography was used to identify regions large enough to accommodate a new herd. The study area included central-eastern Europe Union countries, specifically Germany, Poland, Lithuania, and Latvia. The model identified several highly suitable regions large enough to support a new herd, with the most optimal located in Poland. Highly suitable areas represented 2.7% of the study region. Relative isolation of suitable regions reinforced the challenges of promoting gene flow between reintroduced European bison herds. This model can be replicated in other conservation planning contexts, including reintroduction of large herbivores considering anthropogenic, ecological, and physical conditions. Numéro de notice : A2020-408 Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2019.1672876 date de publication en ligne : 10/10/2019 En ligne : https://doi.org/10.1080/13658816.2019.1672876 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95467 [article]

Tree cover mapping using hybrid fuzzy C-means method and multispectral satellite images / Linda Gulbe in Baltic forestry, vol 25 n° 1 (2019)  

Public [article]  inBaltic forestry > vol 25 n° 1 (2019) . - pp 113 - 123 Titre : Tree cover mapping using hybrid fuzzy C-means method and multispectral satellite images Type de document : Article/Communication Auteurs : Linda Gulbe, Auteur ; Aleksandrs Kozlovs, Auteur ; Janis Donis, Auteur ; Agris Tradkovs, Auteur Année de publication : 2019 Article en page(s) : pp 113 - 123 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes descripteurs IGN] carte de la végétation [Termes descripteurs IGN] classification barycentrique [Termes descripteurs IGN] classification floue [Termes descripteurs IGN] estimation statistique [Termes descripteurs IGN] image Landsat-8 [Termes descripteurs IGN] image Landsat-ETM+ [Termes descripteurs IGN] image Landsat-OLI [Termes descripteurs IGN] image Landsat-TM [Termes descripteurs IGN] image multibande [Termes descripteurs IGN] image Sentinel-MSI [Termes descripteurs IGN] inventaire forestier (techniques et méthodes) [Termes descripteurs IGN] inventaire forestier étranger (données) [Termes descripteurs IGN] Lettonie Résumé : (auteur) Countrywide up-to-date tree cover maps provide valuable information for planning and management purposes to investigate location of the resources and to identify afforestation and deforestation patterns. Landsat programme offers freely available satellite data with time span more than three decades and it can serve as bases for tree cover map calculation using satellite image classification; however, practical use of classification methods is limited due to lack of user-friendly solutions and complex interpretation of the results. The objective of this study is to evaluate user-friendly hybrid classification scheme for tree cover mapping in Latvia and to explore the nature of the spectral classes and consistency of the results when methodology is applied to images of different dates. Tree cover in this context means the area covered by crown of the tree, which may or may not be considered as forest according to local provisions. Tree cover is estimated using unsupervised fuzzy c-means methods with the stability check to ensure the presence of the same spectral classes in independent tests. Spectral classes are classified into two categories: tree cover and other by employing k-nearest neighbours. Such approach does not require high quality sample data and does not include user defined internal parameters of the algorithms (however, they can be specified if needed). The best overall accuracy achieved for year 2014 was 94.2% with producer's accuracy 98.7% (tree cover), 90.5% (other land cover), user's accuracy 90.0% (tree cover), 98.8% (other land cover) and kappa 0.89. Consistency studies showed high impact (within 10% of overall accuracy) of unique conditions during the image acquisition. Some of the spectral classes represent borderline case between relatively dense tree cover and other land cover types like sparse young stands. Those cases are the main threat to the consistency between the results of different dates and seasons. Numéro de notice : A2019-375 Thématique : FORET Nature : Article DOI : sans En ligne : https://www.balticforestry.mi.lt/bf/PDF_Articles/2019-25%5B1%5D/Baltic%20Forestr [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93417 [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])  

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]

State Land Service: Pillar under Latvia's E-government / Frédérique Coumans in GIM international [en ligne], vol 29 n° 10 (October 2015)

Public [article]  inGIM international [en ligne] > vol 29 n° 10 (October 2015) . - pp 31 - 33 Titre : State Land Service: Pillar under Latvia's E-government Type de document : Article/Communication Auteurs : Frédérique Coumans, Auteur Année de publication : 2015 Article en page(s) : pp 31 - 33 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cadastre étranger [Termes descripteurs IGN] cadastre étranger [Termes descripteurs IGN] cadastre numérique [Termes descripteurs IGN] infrastructure nationale des données localisées [Termes descripteurs IGN] Lettonie Résumé : (auteur) After the decline of the Soviet period, Latvia regained its independence and reformed the ownership situation in the country. Over a period of less than 25 years, the public and private land parcels and buildings were recorded in the cadastre information system of the State Land Service (SLS). SLS maintains other highly valued databases and is responsible for a growing part of the national spatial data infrastructure and Latvian e-government. Numéro de notice : a2015-663 Thématique : GEOMATIQUE Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78271 [article]

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Les industries baltes du bois en plein essor / Al Arter in Le Bois International : l'officiel du bois [édition verte], vol 2008 n° 17 (3 et 10 mai 2008)

Public [article]  inLe Bois International : l'officiel du bois [édition verte] > vol 2008 n° 17 (3 et 10 mai 2008) . - p. 47-50 Titre : Les industries baltes du bois en plein essor Type de document : Article/Communication Auteurs : Al Arter, Auteur Année de publication : 2008 Article en page(s) : p. 47-50 Langues : Français (fre) Descripteur : [Termes descripteurs IGN] Estonie [Termes descripteurs IGN] industrie forestière [Termes descripteurs IGN] Lettonie Numéro de notice : IFN_3684 Nature : Article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=72323 [article]

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Geographic information and the enlargement of the European Union / Massimo Craglia (2001)

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Latvian geoid determination with mass point frequency domain inversion / K. Kukums (1993)

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Die Bestimmung des Richtungsvektors Riga-Sofia aus Beobachtungen des Satelliten "Echo 2" / K. Arnold (1971)

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Rapport de la commission permanente de phototopographie aérienne préparé pour le congrès international de géographie, Varsovie, 1934 / Commission permanente de phototopographie (1934)

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