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Mapping spatial distribution of forest age in China / Yuan Zhang in Earth and space science, vol 4 n° 3 (March 2017)
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Titre : Mapping spatial distribution of forest age in China Type de document : Article/Communication Auteurs : Yuan Zhang, Auteur ; Yitong Yao, Auteur ; Xuhui Wang, Auteur ; Yongwen Liu, Auteur ; Shilong Piao, Auteur Année de publication : 2017 Article en page(s) : pp 108 - 116 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Végétation
[Termes IGN] carte forestière
[Termes IGN] Chine
[Termes IGN] Cupressaceae
[Termes IGN] distribution spatiale
[Termes IGN] données lidar
[Termes IGN] données localisées 3D
[Termes IGN] forêt ancienne
[Termes IGN] hauteur des arbres
[Termes IGN] incertitude des données
[Termes IGN] inventaire forestier (techniques et méthodes)
[Termes IGN] inventaire forestier étranger (données)
[Termes IGN] peuplement forestier
[Termes IGN] Pinophyta
[Termes IGN] Pinus massoniana
[Termes IGN] puits de carboneRésumé : (auteur) Forest stand age is a meaningful metric, which reflects the past disturbance legacy, provides guidelines for forest management practices, and is an important factor in qualifying forest carbon cycles and carbon sequestration potential. Reliable large-scale forest stand age information with high spatial resolutions, however, is difficult to obtain. In this study, we developed a top-down method to downscale the provincial statistics of national forest inventory data into 1 km stand age map using climate data and light detection and ranging-derived forest height. We find that the distribution of forest stand age in China is highly heterogeneous across the country, with a mean value of ~42.6 years old. The relatively young stand age for Chinese forests is mostly due to the large proportion of newly planted forests (0–40 years old), which are more prevailing in south China. Older forests (stand age > 60 years old) are more frequently found in east Qinghai-Tibetan Plateau and the central mountain areas of west and northeast China, where human activities are less intensive. Among the 15 forest types, forests dominated by species of , with the exception of Cunninghamia lanceolata stands, have the oldest mean stand age (136 years), whereas Pinus massoniana forests are the youngest (18 years). We further identified uncertainties associated with our forest age map, which are high in west and northeast China. Our work documents the distribution of forest stand age in China at a high resolution which is useful for carbon cycle modeling and the sustainable use of China's forest resources. Numéro de notice : A2107-277 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1002/2016EA000177 En ligne : https://doi.org/10.1002/2016EA000177 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=85298
in Earth and space science > vol 4 n° 3 (March 2017) . - pp 108 - 116[article]Inconsistent estimates of forest cover change in China between 2000 and 2013 from multiple datasets: differences in parameters, spatial resolution, and definitions / Yan Li in Scientific reports, vol 7 (2017)
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Titre : Inconsistent estimates of forest cover change in China between 2000 and 2013 from multiple datasets: differences in parameters, spatial resolution, and definitions Type de document : Article/Communication Auteurs : Yan Li, Auteur ; Damien Sulla-Menashe, Auteur ; Safa Motesharrei, Auteur ; et al., Auteur Année de publication : 2017 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] analyse diachronique
[Termes IGN] Chine
[Termes IGN] cohérence des données
[Termes IGN] estimation statistique
[Termes IGN] image Landsat
[Termes IGN] image Terra-MODIS
[Termes IGN] inventaire forestier (techniques et méthodes)
[Termes IGN] inventaire forestier étranger (données)
[Vedettes matières IGN] Inventaire forestierRésumé : (auteur) The Chinese National Forest Inventory (NFI) has reported increased forest coverage in China since 2000, however, the new satellite-based dataset Global Forest Change (GFC) finds decreased forest coverage. In this study, four satellite datasets are used to investigate this discrepancy in forest cover change estimates in China between 2000 and 2013: forest cover change estimated from MODIS Normalized Burn Ratio (NBR), existing MODIS Land Cover (LC) and Vegetation Continuous Fields (VCF) products, and the Landsat-based GFC. Among these satellite datasets, forest loss shows much better agreement in terms of total change area and spatial pattern than do forest gain. The net changes in forest cover as a proportion of China’s land area varied widely from increases of 1.56% in NBR, 1.93% in VCF, and 3.40% in LC to a decline of −0.40% in GFC. The magnitude of net forest increase derived from MODIS datasets (1.56–3.40%) is lower than that reported in NFI (3.41%). Algorithm parameters, different spatial resolutions, and inconsistent forest definitions could be important sources of the discrepancies. Although several MODIS datasets support an overall forest increase in China, the direction and magnitude of net forest change is still unknown due to the large uncertainties in satellite-derived estimates. Numéro de notice : A2017-781 Affiliation des auteurs : non IGN Thématique : FORET Nature : Article DOI : 10.1038/s41598-017-07732-5 En ligne : http://dx.doi.org/10.1038/s41598-017-07732-5 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=89005
in Scientific reports > vol 7 (2017)[article]A review of sampling effects and response bias in internet participatory mapping (PPGIS/PGIS/VGI) / Greg Brown in Transactions in GIS, vol 21 n° 1 (February 2017)
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Titre : A review of sampling effects and response bias in internet participatory mapping (PPGIS/PGIS/VGI) Type de document : Article/Communication Auteurs : Greg Brown, Auteur Année de publication : 2017 Article en page(s) : pp 39 – 56 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] compétence
[Termes IGN] données localisées des bénévoles
[Termes IGN] échantillonnage
[Termes IGN] erreur de rendu
[Termes IGN] panel de référence
[Termes IGN] planification
[Termes IGN] production participative
[Termes IGN] qualité des données
[Termes IGN] SIG participatif
[Termes IGN] utilisation du solRésumé : (auteur) Global interest in participatory mapping described as public participation GIS (PPGIS), participatory GIS (PGIS), and volunteered geographic information (VGI) continues to grow, but systematic study of spatial data quality and sampling effects is limited. This article provides a review and meta-analysis of Internet-based PPGIS studies conducted during the period 2006–2015 (n=26) to answer the following research questions: (1) How does mapping effort, as a proxy measure for spatial data quality, differ by sampling group? (2) Does the purpose and context of PPGIS influence mapping results? (3) What is the potential for mapping bias through sampling design? (4) Given the results, what should be the focus of future PPGIS research? Mapping effort was highest in sampling groups whose livelihoods were closely related to the purpose of the study, there was greater mapping effort in household sampling groups compared to volunteer groups, and participant domicile had strong effects on mapped results through spatial discounting. The use of online Internet panels provides higher response rates but lower spatial data quality. Future research should focus on increasing sampling response rates, assessing social trade-offs using alternative spatial weighting schemes, and examining the capacity of the public to select land use alternatives as a complement to traditional expert-driven planning systems. Numéro de notice : A2017-160 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12207 En ligne : http://dx.doi.org/10.1111/tgis.12207 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84682
in Transactions in GIS > vol 21 n° 1 (February 2017) . - pp 39 – 56[article]The scale of VGI in map production: A perspective on European national mapping agencies / Ana-Maria Olteanu-Raimond in Transactions in GIS, vol 21 n° 1 (February 2017)
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Titre : The scale of VGI in map production: A perspective on European national mapping agencies Type de document : Article/Communication Auteurs : Ana-Maria Olteanu-Raimond , Auteur ; Glen Hart, Auteur ; Giles M. Foody, Auteur ; Guillaume Touya
, Auteur ; et al., Auteur
Année de publication : 2017 Projets : 3-projet - voir note / Article en page(s) : pp 74 – 90 Note générale : bibliographie
This study was supported by the COST Action TD1202 Mapping and the Citizen Sensor funded by the European Union Seventh Framework Programme and the European Science Foundation.Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes IGN] complètement
[Termes IGN] données localisées des bénévoles
[Termes IGN] mise à jour
[Termes IGN] organisme cartographique national
[Termes IGN] qualité des donnéesRésumé : (auteur) The perspective of European National Mapping Agencies (NMA) on the role of citizen sensing in map production was explored. The NMAs varied greatly in their engagement with the community generating volunteered geographic information (VGI) and in their future plans. From an assessment of NMA standard practices, it was evident that much VGI was acquired with a positional accuracy that, while less than that typically acquired by NMAs, actually exceeded the requirements of the nominal data capture scale used by most NMAs. Opportunities for VGI use in map revision and updating were evident, especially for agencies that use a continuous rather than cyclical updating policy. Some NMAs had also developed systems to engage with citizen sensors and examples are discussed. Only rarely was VGI used to collect data on features beyond the standard set used by the NMAs. The potential role of citizen sensing and so its current scale of use by NMAs is limited by a series of concerns, notably relating to issues of data quality, the nature and motivation of the contributors, legal issues, the sustainability of data source, and employment fears of NMA staff. Possible priorities for future research and development are identified to help ensure that the potential of VGI in mapping is realized. Numéro de notice : A2017-161 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Autre URL associée : vers HAL ouvert Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1111/tgis.12189 Date de publication en ligne : 25/06/2016 En ligne : http://dx.doi.org/10.1111/tgis.12189 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84685
in Transactions in GIS > vol 21 n° 1 (February 2017) . - pp 74 – 90[article]
Titre : Advances in cartography and GIScience : Selections from the International Cartographic Conference 2017 Type de document : Actes de congrès Auteurs : Michael P. Peterson, Éditeur scientifique Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2017 Collection : Lecture notes in Geoinformation and Cartography Sous-collection : Publications of the International Cartographic Association ICA Conférence : ICC 2017, 28th International Cartographic Conference ICA 02/07/2017 07/07/2017 Washington DC Etats-Unis OA Proceedings of the ICA Importance : 542 p. Format : 15 x 21 cm ISBN/ISSN/EAN : 978-3-319-57335-9 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie
[Termes IGN] analyse numérique
[Termes IGN] calcul d'itinéraire
[Termes IGN] carte interactive
[Termes IGN] cartographie collaborative
[Termes IGN] conception cartographique
[Termes IGN] données localisées des bénévoles
[Termes IGN] géovisualisation
[Termes IGN] navigation pédestre
[Termes IGN] qualité cartographique
[Termes IGN] qualité des données
[Termes IGN] temps réel
[Termes IGN] trafic routierNote de contenu : Part 1 : The Span of Cartography
- Cartographic Memory Preservation of the Petrópolis City in Brazil: Koeler Map Scanning Using Photographic Survey. Manoel do C. Fernandes, Tainá Laeta, Deivison F. dos Santos, Paulo M. L. de Menezes
- Location Spoofing in a Location-Based Game: A Case Study of Pokémon Go. Bo Zhao, Qinying Chen
Part 2 : Crowdsourcing and Data
- Educational Aspects of Crowdsourced Noise Mapping. Andrea Pődör, László Zentai
- Crowd and Community Sourced Data Quality Assessment. Laurence Jolivet, Ana-Maria Olteanu-Raimond
- Crowdsourcing Mapping and Participatory Planning Support System: Case Study of Brno, Czechia. Jiří Pánek, Vít Pászto
- A Framework for Enhancing Real-Time Social Media Data to Improve the Disaster Management Process. Syed Attique Shah, Dursun Zafer Şeker, Hande Demirel
- Building a Real-Time Geo-Targeted Event Observation (Geo) Viewer for Disaster Management and Situation Awareness. Ming-Hsiang Tsou, Chin-Te Jung, Christopher Allen, Jiue-An Yang, Su Yeon Han, Brian H. Spitzberg et al.
- The Academic SDI—Towards Understanding Spatial Data Infrastructures for Research and Education. Serena Coetzee, Stefan Steiniger, Barend Köbben, Adam Iwaniak, Iwona Kaczmarek, Petr Rapant et al.
Part 3 : Map Design
- Introducing Leader Lines into Scale-Aware Consistent Labeling. Hsiang-Yun Wu, Shigeo Takahashi, Sheung-Hung Poon, Masatoshi Arikawa
- On the Way to Create Individualized Cartographic Images for Online Maps Using Free and Open Source Tools. Csaba Szigeti, Gáspár Albert, Virág Ilyés, Dávid Kis, Dávid Várkonyi
- Hebrus Valles—The Mars Exploration Zone Map. Mateusz Pitura
- XY Domain: A Sound Map Artwork for Communicating Big Data Characteristics. Antoni B. Moore, Charlotte Parallel
- Reproducible Cartography. Timothée Giraud, Nicolas Lambert
Part 4 : Evaluating Map Quality
- Effectiveness and Efficiency of Using Different Types of Rectangular Treemap as Diagrams in Cartography. Mengjie Zhou, Yan Cheng, Ning Ye, Jing Tian
- The Usability of a GeoVisual Analytics Environment for the Exploration and Analysis of Different Datasets. Irma Kveladze, Menno-Jan Kraak, Corné P. J. M. van Elzakker
- Characterizing Maps from Visual Properties. Catherine Dominguès, Laurence Jolivet
- How Hard Is It to Design Maps for Beginners, Intermediates and Experts? Gáspár Albert, Virág Ilyés, Csaba Szigeti, Dávid Kis, Dávid Várkonyi
- Interaction Problems Found Through Usability Testing on Interactive Maps. Elaine Gomes Vieira de Jesus, Patricia Lustosa Brito, Vivian de Oliveira Fernandes
- The Apprehension of Overlaid Information in a Web Map. Dzenan Dumpor, Terje Midtbø
- Visualization of Environment-related Information in Augmented Reality: Analysis of User Needs. Kateřina Chmelařová, Čeněk Šašinka, Zdeněk Stachoň
Part 5 : Geographic Analysis
- Analysis and Visualization of the Urban Residents’ Income-Related Happiness Index in China. Ying Song, Yang Yu, Yanfang Liu, Zixi Liu, Qianyi Li, Guoguang Xu
- Displaying Voter Gains and Losses: Local Government Elections in South Africa for 2011 and 2016. Peter M. U. Schmitz
- Mapping Community Vulnerability to Poaching: A Whole-of-Society Approach. Peter M. U. Schmitz, Duarte Gonçalves, Merin Jacobs
- Mapping Urban Landscapes Along Streets Using Google Street View. Xiaojiang Li, Carlo Ratti, Ian Seiferling
Part 6 : Numerical Analysis
- Cross-Scale Analysis of Sub-pixel Variations in Digital Elevation Models. Mehran Ghandehari, Barbara P. Buttenfield, Carson J. Q. Farmer
- Extraction of Ridge Lines from Grid DEMs with the Steepest Ascent Method Based on Constrained Direction. Wenping Jiang, Daping Xi, Xiaolong Deng, Lina Huang, Shen Ying
- Using the A⋆ Algorithm to Find Optimal Sequences for Area Aggregation. Dongliang Peng, Alexander Wolff, Jan-Henrik Haunert
- Quantitative Expressions of Spatial Similarity in Multi-scale Map Spaces. Haowen Yan, Liming Zhang, Zhonghui Wang, Weifang Yang, Tao Liu, Liang Zhou
- Balanced Allocation of Multi-criteria Geographic Areas by a Genetic Algorithm. Shahin Sharifi Noorian, Christian E. Murphy
- Rethinking the Buffering Approach for Assessing OpenStreetMap Positional Accuracy. Qi Zhou
- Data Classification for Highlighting Polygons with Local Extreme Values in Choropleth Maps. Jochen Schiewe
Part 7 : Routing
- A Confidence-Based Approach for the Assessment of Accessibility of Pedestrian Network for Manual Wheelchair Users. Amin Gharebaghi, Mir-Abolfazl Mostafavi, Geoffrey Edwards, Patrick Fougeyrollas, Patrick Morales-Coayla, François Routhier et al.
- Accessibility in Pedestrian Routing. Megen Brittell, Christine Grummon, Amy Lobben, Masrudy Omri, Nicholas Perdue
- Visualization of Traffic Bottlenecks: Combining Traffic Congestion with Complicated Crossings. Andreas Keler, Jukka M. Krisp, Linfang Ding
- Psychogeography in the Age of the Quantified Self—Mental Map Modelling with Georeferenced Personal Activity Data. Sebastian Meier, Katrin Glinka
Part 8 : Final Reflections
- In Search of the Essence of Cartography. Marek Baranowski, Dariusz Gotlib, Robert OlszewskiNuméro de notice : 19871 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Actes En ligne : https://doi.org/10.1007/978-3-319-57336-6 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=86071 ContientRéservation
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