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Combining Multi-resolution Evidence for Georeferencing Flickr Images [chapter]

Olivier Van Laere, Steven Schockaert, Bart Dhoedt
2010 Lecture Notes in Computer Science  
We explore the task of determining the geographic location of photos on Flickr, using combined evidence from Naive Bayes classifiers that are trained at different spatial resolutions.  ...  Thus an adaptive method is obtained, by which photos are georeferenced at the most appropriate resolution.  ...  In [3] , Dempster-Shafer theory is used for retrieving images of people, combining evidence from a face recognition module and a classifier based on textual descriptions; again only singletons and the  ... 
doi:10.1007/978-3-642-15951-0_32 fatcat:zosbgcsddradfbfil6u3njcsce

Towards automated georeferencing of Flickr photos

Olivier Van Laere, Steven Schockaert, Bart Dhoedt
2010 Proceedings of the 6th Workshop on Geographic Information Retrieval - GIR '10  
We explore the task of automatically assigning geographic coordinates to photos on Flickr.  ...  Based on this observation, we stress the importance of adaptive approaches that estimate locations at different granularities for different photos.  ...  Next, Section 3 explains how a Naive Bayes classifier could be used for the task of georeferencing Flickr photos, and contains our main experimental results.  ... 
doi:10.1145/1722080.1722087 dblp:conf/gir/LaereSD10 fatcat:uvzfjepiofho5nji5w5dzeob3m

Georeferencing Flickr resources based on textual meta-data

Olivier Van Laere, Steven Schockaert, Bart Dhoedt
2013 Information Sciences  
In particular, state-of-the art systems for georeferencing Flickr photos tend to cluster the locations on Earth in a relatively small set of disjoint regions, apply feature selection to identify location-relevant  ...  Much attention has been focused on Flickr photos and videos, for which it was found that language modeling approaches are particularly suitable.  ...  We would also like to thank the organizers of the MediaEval workshop and the Placing Task organizers in particular for providing us with the Flickr dataset.  ... 
doi:10.1016/j.ins.2013.02.045 fatcat:conaztnl3bfabisnco55givhya

Toward Seamless Multiview Scene Analysis From Satellite to Street Level

Sebastien Lefevre, Devis Tuia, Jan Dirk Wegner, Timothee Produit, Ahmed Samy Nassar
2017 Proceedings of the IEEE  
In this paper, we discuss and review how combined multi-view imagery from satellite to street-level can benefit scene analysis.  ...  We review recent works that attempt to combine images taken from the ground and overhead views for purposes like scene registration, reconstruction, or classification.  ...  Missing spectral channels (e.g., near-infrared), that usually contribute significant evidence to tree detection and species recognition, are compensated by the sheer amount of training data in combination  ... 
doi:10.1109/jproc.2017.2684300 fatcat:r3hyfdtjzzaknl25cpygxrcgq4

Uncovering locally characterizing regions within geotagged data

Bart Thomee, Adam Rae
2013 Proceedings of the 22nd international conference on World Wide Web - WWW '13  
We demonstrate our technique operating at scale by discovering the boundaries of the most geospatially salient tags associated with a large collection of georeferenced photos from Flickr and compare our  ...  We then derive region boundaries by applying localized label weighting and image processing techniques to the scalespace representation of each label.  ...  Dataset Our Flickr dataset contains a sample of over 56 million georeferenced images uploaded to Flickr before the end of 2010.  ... 
doi:10.1145/2488388.2488500 dblp:conf/www/ThomeeR13 fatcat:sxlkbktbgfg5fbf7pspeu27dh4

Discovery and publishing of primary biodiversity data associated with multimedia resources: The Audubon Core strategies and approaches

Robert A Morris, Vijay Barve, Mihail Carausu, Vishwas Chavan, José Cuadra, Chris Freeland, Gregor Hagedorn, Patrick Leary, Dimitry Mozzherin, Annette Olson, Gregory Riccardi, Ivan Teage (+1 others)
2013 Biodiversity Informatics  
By defining only four terms as mandatory, it seeks to lighten the burden for providing or using multimedia useful for biodiversity science.  ...  The Audubon Core Multimedia Resource Metadata Schema (simply "Audubon Core" or "AC") is a representation-free vocabulary for the description of biodiversity multimedia resources and collections, now in  ...  ., for images, small thumbnails or screen-sized resolutions). The management of multiple access points returning the resource in different forms and resolutions is therefore essential.  ... 
doi:10.17161/bi.v8i2.4117 fatcat:dhd6324sgvfa5ldzlrg6rr6rdq

GIS-Based Emotional Computing: A Review of Quantitative Approaches to Measure the Emotion Layer of Human–Environment Relationships

Yingjing Huang, Teng Fei, Mei-Po Kwan, Yuhao Kang, Jun Li, Yizhuo Li, Xiang Li, Meng Bian
2020 ISPRS International Journal of Geo-Information  
In recent years, with the growing accessibility of abundant contextual emotion information, which is benefited by the numerous georeferenced user-generated content and the maturity of artificial intelligence  ...  The methodology presented in this paper consists of three key steps: (1) collecting georeferenced data containing emotion and environment information such as social media and official sites, (2) detecting  ...  The impact of GIS-based emotional computing is multi-fold.  ... 
doi:10.3390/ijgi9090551 fatcat:dpbqacn6zvbzze42i2y4itfdeu

Re-photography and Environment Monitoring Using a Social Sensor Network [chapter]

Paul Chippendale, Michele Zanin, Claudio Andreatta
2009 Lecture Notes in Computer Science  
Through the implementation of an accurate image registration system, based on image processing, terrain modelling and subsequent correlation, we will demonstrate how images taken by the public can potentially  ...  To demonstrate the coverage obtainable, we downloaded and registered 100 georeferenced images taken in the area of the Matterhorn from Flickr.  ...  The most prominent/evident geographical peak or valley is used as a starting point for the search for a match.  ... 
doi:10.1007/978-3-642-04146-4_6 fatcat:4nvnoisxufa5botgz33y2cgp24

Investigating the Feasibility of Geo-Tagged Photographs as Sources of Land Cover Input Data

Vyron Antoniou, Cidália Fonte, Linda See, Jacinto Estima, Jamal Arsanjani, Flavio Lupia, Marco Minghini, Giles Foody, Steffen Fritz
2016 ISPRS International Journal of Geo-Information  
A similar approach was used by the authors in [35] for land use classification using geo-tagged images from Flickr.  ...  For example, Li et al. [30] proposed an automated method to generate a map of the main roads in Beijing using geo-tagged images from Flickr.  ...  contribution of COST Actions TD1202 "Mapping and Citizen Sensor" http://www.citizen-sensor-cost.eu and IC1203 "ENERGIC" http://vgibox.eu/, the ERC CrowdLand project (No. 617754) and FCT (project UID/MULTI  ... 
doi:10.3390/ijgi5050064 fatcat:jksa7pdsprhunpvyifffnkccaq

Social media as an information source for rapid flood inundation mapping

J. Fohringer, D. Dransch, H. Kreibich, K. Schröter
2015 Natural Hazards and Earth System Sciences  
Due to the rapid availability of these posts compared to traditional data sources such as remote sensing data, areas affected by a flood, for example, can be determined quickly.  ...  The study was undertaken and financed under the framework of CEDIM -Center for Disaster Management and Risk Reduction Technology.  ...  The article processing charges for this open-access publication were covered by a Research Centre of the Helmholtz Association. Edited by: D. Molinari Reviewed by: two anonymous referees  ... 
doi:10.5194/nhess-15-2725-2015 fatcat:3c7y4xwqjfdvlmfux64kopyroa

Social media as an information source for rapid flood inundation mapping

J. Fohringer, D. Dransch, H. Kreibich, K. Schröter
2015 NHESSD  
Due to the rapid availability of these posts compared to traditional data sources such as remote sensing data, for example areas affected by a flood can be determined quickly.  ...  The study was undertaken and financed under the framework of CEDIM -Center for Disaster Management and Risk Reduction Technology.  ...  The article processing charges for this open-access publication were covered by a Research Centre of the Helmholtz Association. Edited by: D. Molinari Reviewed by: two anonymous referees  ... 
doi:10.5194/nhessd-3-4231-2015 fatcat:zcyoj6gnwfhg5cljdnmapym3oq

E2mC: Improving Emergency Management Service Practice through Social Media and Crowdsourcing Analysis in Near Real Time

Clemens Havas, Bernd Resch, Chiara Francalanci, Barbara Pernici, Gabriele Scalia, Jose Fernandez-Marquez, Tim Van Achte, Gunter Zeug, Maria Mondardini, Domenico Grandoni, Birgit Kirsch, Milan Kalas (+2 others)
2017 Sensors  
In the first hours of a disaster, up-to-date information about the area of interest is crucial for effective disaster management.  ...  This paper sketches the developed system architecture, describes applicable scenarios and presents several preliminary case studies, providing evidence that the scientific and operational goals have been  ...  Furthermore, we would like to thank Wendy Guan from Harvard University's Center for Geographic Analysis for her support through providing us with the Twitter data for our study.  ... 
doi:10.3390/s17122766 pmid:29186080 pmcid:PMC5751655 fatcat:2trtqzcvxjcnrafhzamvi7k4fa

TOWARDS COMPLETE, GEO-REFERENCED 3D MODELS FROM CROWD-SOURCED AMATEUR IMAGES

W. Hartmann, M. Havlena, K. Schindler
2016 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
A small proportion of the images in Internet collections (≈ 10 %) do possess geo-tags.  ...  By providing approximate geo-reference for partial reconstructions they make it possible to fuse those pieces into more complete models; the capability to fuse partial reconstruction opens up the possibility  ...  Finally, we also use the geo-tags as evidence for absolute georeferencing.  ... 
doi:10.5194/isprs-annals-iii-3-51-2016 fatcat:twt25mbsvjbanf4h6ti644ajr4

TOWARDS COMPLETE, GEO-REFERENCED 3D MODELS FROM CROWD-SOURCED AMATEUR IMAGES

W. Hartmann, M. Havlena, K. Schindler
2016 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
A small proportion of the images in Internet collections (≈ 10 %) do possess geo-tags.  ...  By providing approximate geo-reference for partial reconstructions they make it possible to fuse those pieces into more complete models; the capability to fuse partial reconstruction opens up the possibility  ...  Finally, we also use the geo-tags as evidence for absolute georeferencing.  ... 
doi:10.5194/isprsannals-iii-3-51-2016 fatcat:iatbt2a6prh7rog6c6wxol2xoq

Crowd-Sourced City Images: Decoding Multidimensional Interaction between Imagery Elements with Volunteered Photos

Yao Shen, Yiyi Xu, Lefeng Liu
2021 ISPRS International Journal of Geo-Information  
The dominating elements are only one side of the city image; more importantly, the interactions between elements are also crucial for understanding how city images are structured in people's minds.  ...  The outputs are interdependent elements, typologies of elements, imagery areas, and preferences for groups, which are essential for urban design processes.  ...  This facilitates studies on collective, fine-resolution, and multi-dimensional city images across the population and their distributional effects and meanings.  ... 
doi:10.3390/ijgi10110740 fatcat:r4z4xcortffunfmorjk6hgft3y
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