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Geo-tagging for imprecise regions of different sizes

Robert C. Pasley, Paul D. Clough, Mark Sanderson
2007 Proceedings of the 4th ACM workshop on Geographical information retrieval - GIR '07  
We find that the data gathered for smaller regions (compared with larger ones) is more "fine-grained" which has an effect on the type of resource most useful for geo-tagging and its success.  ...  One such use for this information is to enable the study of vernacular regions: informal places referred to on a day-to-day basis, but with no official entry in geographical resources, such as gazetteers  ...  Table 1 . 1 Geo-tagging effectiveness for regions of different sizes Region Correct Error Geo- refs False positives Incorrect Incorrect gazetteer The Midlands 2523 21.2% 50% 28.7% 26.1%  ... 
doi:10.1145/1316948.1316969 dblp:conf/gir/PasleyCS07 fatcat:tdcnusb4azb2rjsetpwn6dhbx4

A system for region search and exploration

Kaiyu Feng, Kaiqi Zhao, Yiding Liu, Gao Cong
2016 Proceedings of the VLDB Endowment  
With the increasing popularity of mobile devices and location based services, massive amount of geo-textual data (e.g., geo-tagged tweets) is being generated everyday.  ...  First, it has many applications to retrieve a region for exploration that satisfies user-specified conditions (e.g., the size and shape of the region) while maximizing some other conditions (e.g., the  ...  Acknowledgments This work is supported in part by a Tier-1 grant awarded by Ministry of Education Singapore (RG22/15).  ... 
doi:10.14778/3007263.3007306 fatcat:py4ujjdu4jftxb4djrrjjtl7x4

"Contextualized VGI" Creation and Management to Cope with Uncertainty and Imprecision

Gloria Bordogna, Luca Frigerio, Tomáš Kliment, Pietro Brivio, Laure Hossard, Giacinto Manfron, Simone Sterlacchini
2016 ISPRS International Journal of Geo-Information  
and the representation of the context of the geo-localization.  ...  This paper investigates the causes of imprecision of the observations and uncertainty of the authors who create Volunteer Geographic Information (VGI), i.e., georeferenced contents generated by volunteers  ...  to collect and document the growth of crops within different study areas of Lombardy Region.  ... 
doi:10.3390/ijgi5120234 fatcat:xjhezfuwxrhpreseeaftzkuw4q

A Geo-Clustering Approach for the Detection of Areas-of-Interest and Their Underlying Semantics

Evaggelos Spyrou, Michalis Korakakis, Vasileios Charalampidis, Apostolos Psallas, Phivos Mylonas
2017 Algorithms  
In order to identify them, we exploit two types of metadata, namely location-based information included within geo-tagged photos that we collect from Flickr, along with plain simple textual information  ...  Due to this proliferation of data volume, there has been an explosion of new application domains for information mined from social networks.  ...  tag within the given region; (b) the occurrences of the tag within the given region and (c) the average percentage of a tag among those selected by the user for the given region.  ... 
doi:10.3390/a10010035 fatcat:icle4xl5hnfjjhahnek3jcyr3m


He Ma, Roger Zimmermann, Seon Ho Kim
2012 Proceedings of the 20th International Conference on Advances in Geographic Information Systems - SIGSPATIAL '12  
To this end we introduce HUGVid, a modeling and indexing approach for uncertain geo-tagged videos. We construct an uncertainty model for video frames and segments.  ...  Therefore, robust error-tolerance is an essential feature of any geo-tagged video search application.  ...  The contribution of our work can be summarized as follows: • Uncertain data model for individual geo-tagged video frames.  ... 
doi:10.1145/2424321.2424362 dblp:conf/gis/MaZK12 fatcat:5hleytaytjblbnplyoyeqkjmxa

SnowWatch: Snow Monitoring through Acquisition and Analysis of User-Generated Content [article]

Roman Fedorov, Piero Fraternali, Chiara Pasini, Marco Tagliasacchi
2015 arXiv   pre-print
The proposed system integrates an automatic acquisition and analysis of photographs and webcam images depicting Alpine mountains.  ...  We present a system for complementing snow phenomena monitoring with virtual measurements extracted from public visual content.  ...  If some data are missing or incorrect (i.e. despite the geo-tag imprecisely saved in the photograph the user is sure about the correct location of the photograph) those can be edited and the photograph  ... 
arXiv:1507.08958v1 fatcat:ipqpmmd72fb3lcx7cqhwh5rvmi

Large-Scale Mapping of Human Activity using Geo-Tagged Videos [article]

Yi Zhu, Sen Liu, Shawn Newsam
2017 arXiv   pre-print
This paper is the first work to perform spatio-temporal mapping of human activity using the visual content of geo-tagged videos.  ...  We also demonstrate the advantages of using the visual content over the tags/titles.  ...  This work was funded in part by a National Science Foundation CA-REER grant, #IIS-1150115, and a seed grant from the Center for Information Technology in the Interest of Society (CITRIS).  ... 
arXiv:1706.07911v3 fatcat:q5ejnmm3wfd3hbwokkbx4p5gzy

Capturing Place Semantics on the GeoSocial Web

Ehab ElGindy, Alia Abdelmoty
2014 Journal on Data Semantics  
In this paper a novel framework is proposed for the analysis of geo-folksonomies and the automatic discovery of place-related semantics.  ...  Massive interest in geo-referencing of personal resources is evident on the web.  ...  The performance of the different MSR methods in terms of quality and accuracy is found to be dependent on the size and type of the input data [23] .  ... 
doi:10.1007/s13740-014-0034-8 fatcat:7c3eimierzfzngix3lroplvjyq

Acquisition of a vernacular gazetteer from web sources

Florian A. Twaroch, Christopher B. Jones, Alia I. Abdelmoty
2008 Proceedings of the first international workshop on Location and the web - LOCWEB '08  
For purposes of effective information retrieval, the spatial extent associated with these names should be able to reflect people's perception of the place, even though this may differ sometimes from the  ...  administrative definition of the same place name.  ...  Pasley et al [6] investigate the definition of imprecise regions of different sizes using web queries and a geo-tagging algorithm.  ... 
doi:10.1145/1367798.1367808 dblp:conf/www/TwarochJA08 fatcat:c4mdxzscprhyxpzawj4muprnci

Predicting Geo-informative Attributes in Large-Scale Image Collections Using Convolutional Neural Networks

Stefan Lee, Haipeng Zhang, David J. Crandall
2015 2015 IEEE Winter Conference on Applications of Computer Vision  
Geographic location is a powerful property for organizing large-scale photo collections, but only a small fraction of online photos are geo-tagged.  ...  We learn models for these attributes using a large (noisy) set of geo-tagged images from Flickr by training deep convolutional neural networks (CNNs).  ...  For the histograms, we computed 8-bin histograms over each RGB plane within spatial regions of dif- Table 2 : Classification accuracies for geo-spatial attributes.  ... 
doi:10.1109/wacv.2015.79 dblp:conf/wacv/LeeZC15 fatcat:dx5wegtgindrlilrjtdokrsjju

Extraction of Spatio-Temporal Data for Social Networks [chapter]

Judith Gelernter, Dong Cao, Kathleen M. Carley
2012 Lecture Notes in Social Networks  
Contributions of this paper are (1) techniques to mine for location from text (2) techniques to mine for social network edges (associations between location and person), (3) use of the mined data to make  ...  We describe an application using the algorithm based upon a small set of data from the Sudan Tribune divided into three periods in 2006 for the Darfur crisis.  ...  Acknowledgments Thanks are due to Michael Bigrigg for his insights into the network analysis. This work was supported in part by the Air Force  ... 
doi:10.1007/978-3-7091-1346-2_15 dblp:series/lnsn/GelernterCC13 fatcat:l5hbwxw3i5gknn6qsbaclfg3gi

Shadow Detection and Geo-tagged Image Information Based Strategic Infrastructure Characterization [article]

E. MD. Abdelrahim, Romany F. Mansour
2018 arXiv   pre-print
Exploring the significance of geo-tagged information of a satellite image and associated shadow information in the image to enable man-made infrastructure dimensional characterization, in this paper a  ...  Our proposed method applies shadow detection and shadow feature along with geo-tagged information retrieved through Google Earth tools, to estimate the structural dimension of the man-made infrastructure  ...  Furthermore, to retrieve the geo-tagged information of the image, free version of the Google Earth has been applied.  ... 
arXiv:1709.08375v2 fatcat:dvu6lcc46famvnl2js74zmu6ai

GeoCAM: A geovisual analytics workspace to contextualize and interpret statements about movement

Anuj Jaiswal, Scott Pezanowski, Prasenjit Mitra, Xiao Zhang, Sen Xu, Ian Turton, Alexander Klippel, Alan M. MacEachren
2011 Journal of Spatial Information Science  
We have built a set of geo-enabled, computational methods to identify documents containing movement statements, and a visual analytics environment that uses natural language processing methods iteratively  ...  two objectives: (1) build the conceptual, theoretical, and empirical framework needed to represent and interpret human-generated directions; and (2) design and implement a geovisual analytics workspace for  ...  or implied, of the National Geospatial-Intelligence Agency, or the US Government.  ... 
doi:10.5311/josis.2011.3.55 fatcat:hagcq4tcdrb6xpsttwsi42u7wq

Crowds replace experts: Building better location-based services using mobile social network interactions

Pravin Shankar, Yun-Wu Huang, Paul Castro, Badri Nath, Liviu Iftode
2012 2012 IEEE International Conference on Pervasive Computing and Communications  
The relevance of location-based query results is very important, especially for mobile phones with limited screen size.  ...  We implemented our system as a location-based search engine that uses geo-tweets by Twitter users to learn about places.  ...  ACKNOWLEDGMENTS We would like to thank the anonymous referees for their suggestions. This work was supported in part by the NSF under grant CNS-1111811.  ... 
doi:10.1109/percom.2012.6199845 dblp:conf/percom/ShankarHCNI12 fatcat:rhho7ylupncq7porzltrq2vtoy

Assessing the Veracity of Methods for Extracting Place Semantics from Flickr Tags

William A Mackaness, Omair Chaudhry
2013 Transactions on GIS  
Acknowledgement We wish to acknowledge the thoughtful, thorough and helpful suggestions of anonymous reviewers and for comments from researchers at the GISRUK conference in 2012.  ...  (b) Selected tags at 100m 2 for the region highlighted in (a) at 500m 2 Figure 2 :Figure 3 : 23 A 'treeview' visualisation of selected tags and their unique user frequency at different levels of detail  ...  Result of manual inspection revealing increased presence of non-place tags at smaller cell sizes for Edinburgh, UK.  ... 
doi:10.1111/tgis.12043 fatcat:estuexn74nb6lkf2auuibyixpy
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