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Possibilities of land use change analysis in a mountainous rural area: a methodological approach / Szilárd Szabó in International journal of geographical information science IJGIS, vol 30 n° 3-4 (March - April 2016)
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Titre : Possibilities of land use change analysis in a mountainous rural area: a methodological approach Type de document : Article/Communication Auteurs : Szilárd Szabó, Auteur ; László Bertalan, Auteur ; Ágnes Kerebes, Auteur ; Tibor J. Novák, Auteur Année de publication : 2016 Article en page(s) : pp 708 - 726 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] analyse comparative
[Termes IGN] analyse de données
[Termes IGN] analyse diachronique
[Termes IGN] forêt
[Termes IGN] Hongrie
[Termes IGN] milieu rural
[Termes IGN] montagne
[Termes IGN] système d'information géographique
[Termes IGN] utilisation du solRésumé : (Auteur) Decreasing population density is a current trend in the European Union, and causes a lower environmental impact on the landscape. However, besides the desirable effect on the regeneration processes of semi-natural forest ecosystems, the lack of traditional management techniques can also lead to detrimental ecological processes. In this study we investigated the land use pattern changes in a micro-region (in North-Eastern Hungary) between 1952 and 2005, based on vectorised land use data from archive aerial photos. We also evaluated the methodology of comparisons using GIS methods, fuzzy sets and landscape metrics. We found that both GIS methods and statistical analysis of landscape metrics resulted in more or less the same findings. Differences were not as relevant as was expected considering the general tendencies of the past 60 years in Hungary. The change in the annual rate of forest recovery was 0.12%; settlements extended their area by an annual rate of 3.04%, while grasslands and arable lands had a net loss in their area within the studied period (0.60% and 0.89%, respectively). The kappa index showed a smaller similarity (~60%) between these dates but the fuzzy kappa and the aggregation index, taking into account both spatial and thematic errors, gave a more reliable result (~70–80% similarity). Landscape metrics on patch and class level ensured the possibility of a detailed analysis. We arrived at a similar outcome but were able to verify all the calculations through statistical tests. With this approach we were able to reveal significant (p Numéro de notice : A2016-096 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2015.1092546 En ligne : https://doi.org/10.1080/13658816.2015.1092546 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79893
in International journal of geographical information science IJGIS > vol 30 n° 3-4 (March - April 2016) . - pp 708 - 726[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 079-2016021 RAB Revue Centre de documentation En réserve L003 Disponible Spatial accuracy of UAV- derived orthoimagery and topography: Comparing photogrammetric models processed with direct geo-referencing and ground control points / Chris H. Hugenholtz in Geomatica, vol 70 n° 1 (March 2016)
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Titre : Spatial accuracy of UAV- derived orthoimagery and topography: Comparing photogrammetric models processed with direct geo-referencing and ground control points Type de document : Article/Communication Auteurs : Chris H. Hugenholtz, Auteur ; Owen Brown, Auteur ; Jordan Walker, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 21 - 30 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] acquisition de données
[Termes IGN] analyse comparative
[Termes IGN] capteur aérien
[Termes IGN] drone
[Termes IGN] géoréférencement direct
[Termes IGN] point d'appui
[Termes IGN] positionnement cinématique en temps réel
[Termes IGN] positionnement inertiel
[Termes IGN] positionnement par GNSS
[Termes IGN] positionnement par GPS
[Termes IGN] qualité des données
[Termes IGN] réalité de terrain
[Termes IGN] topographieRésumé : (auteur) Mapping with unmanned aerial vehicles (UAVs) typically involves the deployment of ground control points (GCPs) to georeference the images and topographic model. An alternative approach is direct georeferencing, whereby the onboard Global Navigation Satellite System (GNSS) and inertial measurement unit are used without GCPs to locate and orient the data. This study compares the spatial accuracy of these approaches using two nearly identical UAVs. The onboard GNSS is the one difference between them, as one vehicle uses a survey-grade GNSS/RTK receiver (RTK UAV), while the other uses a lower-grade GPS receiver (non-RTK UAV). Field testing was performed at a gravel pit, with all ground measurements and aerial surveying completed on the same day. Three sets of orthoimages and DSMs were produced for comparing spatial accuracies: two sets were created by direct georeferencing images from the RTK UAV and non-RTK UAV and one set was created by using GCPs during the external orientation of the non-RTK UAV images. Spatial accuracy was determined from the horizontal (X,Y) and vertical (Z) residuals and root-mean-square-errors (RMSE) relative to 17 horizontal and 180 vertical check points measured with a GNSS/RTK base station and rover. For the two direct georeferencing datasets, the horizontal and vertical accuracy improved substantially with the survey-grade GNSS/RTK receiver onboard the RTK UAV, effectively reducing the RMSE values in X, Y and Z by 1 to 2 orders of magnitude compared to the lower grade GPS receiver onboard the non-RTK UAV. Importantly, the horizontal accuracy of the RTK UAV data processed via direct georeferencing was equivalent to the horizontal accuracy of the non-RTK UAV data processed with GCPs, but the vertical error of the DSM from the RTK UAV data was 2 to 3 times greater than the DSM from the non-RTK data with GCPs. Overall, results suggest that direct georeferencing with the RTK UAV can achieve horizontal accuracy comparable to that obtained with a network of GCPs, but for topographic measurements requiring the highest achievable accuracy, researchers and practitioners should use GCPs. Numéro de notice : A2016-433 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : 10.5623/cig2016-102 En ligne : https://doi.org/10.5623/cig2016-102 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81330
in Geomatica > vol 70 n° 1 (March 2016) . - pp 21 - 30[article]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]Cartographie à grande échelle des habitats de la faune sauvage et évaluation / Alexia Dublanche (2016)
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Titre : Cartographie à grande échelle des habitats de la faune sauvage et évaluation Type de document : Mémoire Auteurs : Alexia Dublanche, Auteur ; Laurence Jolivet , Encadrant ; Marianne Cohen, Encadrant
Editeur : Paris : Université Paris – Sorbonne Année de publication : 2016 Importance : 121 p. Note générale : bibliographie
rapport de stage de fin d'études master 2 Géodynamiques des Espaces Présents et PassésLangues : Français (fre) Descripteur : [Vedettes matières IGN] Cartographie thématique
[Termes IGN] analyse comparative
[Termes IGN] base de données localisées
[Termes IGN] caractérisation
[Termes IGN] carte thématique
[Termes IGN] habitat animalIndex. décimale : MASTX Mémoires de masters divers Résumé : (auteur) Cartographier les habitats de la faune sauvage est un enjeu important pour la caractérisation des milieux de vie de celle‐ci. Le but de ce mémoire est de caractériser l’habitat à l’échelle du domaine vital d’un individu par rapport à l’occupation du sol, mais aussi en fonction des caractéristiques de son espèce. L’objectif est de réaliser ces cartes à partir de bases de données existantes. Nous avons commencé par constituer une nomenclature définie en fonction de ces bases de données d’occupation du sol. Nous avons défini une couverture du sol qui permet une description précise du lieu et un usage du sol pour caractériser les lieux de vie des animaux. Nous avons ensuite réalisé une carte d’habitats en utilisant comme données sources, les bases de données que nous avions utilisées pour définir la nomenclature. Ensuite, nous avons évalué cette carte en fonction de plusieurs critères (route, clôture, formations arborées et utilisation de l’espace par le renard). Cela nous a permis de définir des points à améliorer pour que la carte d’habitats représente mieux les habitats de la faune sauvage comme de préciser les types de végétation et les barrières potentielles. Note de contenu : 1. Contexte et objectifs du stage
2. État de l’art
3. Méthodologie
4. Évaluation des cartes
5. Perspectives et améliorations à apporter à la carte
Conclusion généraleNuméro de notice : 17689 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Mémoire masters divers Organisme de stage : COGIT (IGN) DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=99153 Documents numériques
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Cartographie à grande échelle ... - pdf auteurAdobe Acrobat PDFA comparative study of existing multi-scale maps: what content at which scale? / Marion Dumont (2016)
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Titre : A comparative study of existing multi-scale maps: what content at which scale? Type de document : Article/Communication Auteurs : Marion Dumont , Auteur ; Guillaume Touya
, Auteur ; Cécile Duchêne
, Auteur
Editeur : Berkeley [Californie - Etats-Unis] : University of California Année de publication : 2016 Projets : MapMuxing / Christophe, Sidonie Conférence : GIScience 2016, Short Papers, 9th international conference on geographic information science 27/09/2016 30/09/2016 Montréal Québec - Canada OA Proceedings Importance : pp 88 - 91 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse comparative
[Termes IGN] carte topographique
[Termes IGN] mise à l'échelle
[Termes IGN] niveau d'abstraction
[Termes IGN] zoom
[Vedettes matières IGN] GénéralisationRésumé : (auteur) This paper presents a comparative study of existing topographic multi-scale maps, regarding relations between display scale and level of abstraction (LoA) of the map content. The general trends in zoom levels distribution across scale and the original patterns in transitions between LoAs are especially highlighted. Numéro de notice : C2016-044 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : 10.21433/B3112993d46 En ligne : https://doi.org/10.21433/B3112993d46 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=91888 Documents numériques
en open access
A comparative study of existing multi-scale maps - pdf éditeurAdobe Acrobat PDF PermalinkEvaluation of NER systems for the recognition of place mentions in French thematic corpora / Carmen Brando (2016)
PermalinkGini coefficient predictions from airborne lidar remote sensing display the effect of management intensity on forest structure / Rubén Valbuena in Ecological indicators, vol 60 (January 2016)
PermalinkMise en place de procédures automatiques en vue d’accélérer la production des plans topographiques au sein de l’entreprise Techni Drone / Kévin Javerliat (2016)
PermalinkPermalinkPermalinkWide-area ionospheric delay model for GNSS users in middle- and low-magnetic-latitude regions / An-Lin Tao in GPS solutions, vol 20 n° 1 (January 2016)
PermalinkA hybrid link-node approach for finding shortest paths in road networks with turn restrictions / Qingquan Li in Transactions in GIS, vol 19 n° 6 (December 2015)
PermalinkMapping with small UAS: A point cloud accuracy assessment / Charles K. Toth in Journal of applied geodesy, vol 9 n° 4 (December 2015)
PermalinkLe relevé 3D du patrimoine culturel : la Ca' Vendramin dei Leoni, musée Guggenheim de Venise / Caterina Balletti in XYZ, n° 145 (décembre 2015 - février 2016)
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