default search action
Google
Google Scholar
Semantic Scholar
Internet Archive Scholar
CiteSeerX
ORCIDHanan Samet
Person information
- affiliation: University of Maryland, College Park, USA
- award (2014): W. Wallace McDowell Award
- award (2011): Paris Kanellakis Award
Refine list
refinements active!
zoomed in on ?? of ?? records
view refined list in
export refined list as
showing all ?? records
2020 – today
- 2024
[j121]Debajyoti Ghosh
, Jagan Sankaranarayanan, Kiran Khatter, Hanan Samet:
Opportunistic package delivery as a service on road networks. GeoInformatica 28(1): 53-88 (2024)- [c207]Nicole R. Schneider, Kent O'Sullivan, Hanan Samet:
The Future of Graph-based Spatial Pattern Matching (Vision Paper). ICDEW 2024: 360-364 - 2023
- [j120]Debajyoti Ghosh, Jagan Sankaranarayanan, Kiran Khatter, Hanan Samet:
In-Path Oracles for Road Networks. ISPRS Int. J. Geo Inf. 12(7): 277 (2023) - [j119]Brian D. Ondov, Hanan Samet:
An efficient region expansion algorithm for regular triangulated meshes. Pattern Recognit. Lett. 168: 1-7 (2023) - [c206]Kent O'Sullivan, Nicole R. Schneider, Aleeza Rasheed, Hanan Samet:
GESTALT: Geospatially Enhanced Search with Terrain Augmented Location Targeting. GeoSearch@SIGSPATIAL 2023: 1:1-1:8 - [c205]Vincent Hsiao, Hanan Samet:
Metric Indexing for the Earth Mover's Distance. GeoSearch@SIGSPATIAL 2023: 3:1-3:8 - [c204]Kent O'Sullivan, Nicole R. Schneider, Hanan Samet:
COMPASS: Cardinal Orientation Manipulation and Pattern-Aware Spatial Search. GeoSearch@SIGSPATIAL 2023: 5:1-5:8 - [c203]Jason Zhang, Ai-Te Kuo, Nicole R. Schneider, Jacob Peters, Hanan Samet:
BroadcastSTAND: Clustering Multimedia Sources of News. LocalRec@SIGSPATIAL 2023: 33-36 - [c202]Nicole R. Schneider, Jagan Sankaranarayanan, Hanan Samet:
Cross-lingual Text Clustering in a Large System. NLPIR 2023: 1-11 - 2022
- [j118]Victor Junqiu Wei, Raymond Chi-Wing Wong, Cheng Long, David M. Mount, Hanan Samet:
Proximity Queries on Terrain Surface. ACM Trans. Database Syst. 47(4): 15:1-15:59 (2022) - [c201]Saeed Nasehi Basharzad, Farhana Murtaza Choudhury, Egemen Tanin, Lachlan L. H. Andrew, Hanan Samet, Majid Sarvi:
Electric vehicle charging: it is not as simple as charging a smartphone (vision paper). SIGSPATIAL/GIS 2022: 32:1-32:4 - [i10]Brian D. Ondov, Harsh B. Patel, Ai-Te Kuo, Hanan Samet, John H. Kastner, Yunheng Han, Hong Wei, Niklas Elmqvist:
CoronaViz: Visualizing Multilayer Spatiotemporal COVID-19 Data with Animated Geocircles. CoRR abs/2211.05823 (2022) - [i9]Harsh Patel, Nicole R. Schneider, Hanan Samet:
Using dynamic circles and squares to visualize spatio-temporal variation. CoRR abs/2211.05965 (2022) - 2021
- [j117]Mingzhao Li, Zhifeng Bao, Farhana Murtaza Choudhury, Hanan Samet, Matt Duckham, Timos Sellis:
AOI-shapes: An Efficient Footprint Algorithm to Support Visualization of User-defined Urban Areas of Interest. ACM Trans. Interact. Intell. Syst. 11(3-4): 27:1-27:32 (2021) - [c200]Janit Anjaria, Hong Wei, Hao Li, Shlok Mishra, Hanan Samet:
TrajDistLearn: learning to compute distance between trajectories. IWCTS@SIGSPATIAL 2021: 4:1-4:9 - [c199]Nicole R. Schneider, Hanan Samet:
Which portland is it?: a machine learning approach. LocalRec@SIGSPATIAL 2021: 8:1-8:10 - [c198]David Li, Hanan Samet, Amitabh Varshney:
Visualizing accessibility with choropleth maps. LocalRec@SIGSPATIAL 2021: 9:1-9:4 - [c197]Edward Buckland, Egemen Tanin, Nicholas Geard, Cameron Zachreson, Hairuo Xie, Hanan Samet:
Managing Trajectories and Interactions During a Pandemic: A Trajectory Similarity-based Approach (Demo Paper). SIGSPATIAL/GIS 2021: 423-426 - [c196]Ai-Te Kuo, Hanan Samet:
MusicStand: Listening to Song Lyrics Using a Map Query Interface. SIGSPATIAL/GIS 2021: 446-449 - [c195]Yanchuan Chang, Jianzhong Qi, Egemen Tanin, Xingjun Ma, Hanan Samet:
Sub-trajectory Similarity Join with Obfuscation. SSDBM 2021: 181-192 - [i8]Yanchuan Chang, Jianzhong Qi, Egemen Tanin, Xingjun Ma, Hanan Samet:
Sub-trajectory Similarity Join with Obfuscation. CoRR abs/2106.03355 (2021) - 2020
- [j116]Hong Wei, Jagan Sankaranarayanan, Hanan Samet:
Enhancing local live tweet stream to detect news. GeoInformatica 24(2): 411-441 (2020) - [j115]Zongyu Lin, Shiqing Lyu, Hancheng Cao, Fengli Xu, Yuqiong Wei, Hanan Samet, Yong Li:
HealthWalks: Sensing Fine-grained Individual Health Condition via Mobility Data. Proc. ACM Interact. Mob. Wearable Ubiquitous Technol. 4(4): 138:1-138:26 (2020) - [j114]Munkh-Erdene Yadamjav, Zhifeng Bao, Baihua Zheng, Farhana Murtaza Choudhury, Hanan Samet:
Querying Recurrent Convoys over Trajectory Data. ACM Trans. Intell. Syst. Technol. 11(5): 59:1-59:24 (2020) - [j113]Hancheng Cao, Fengli Xu, Jagan Sankaranarayanan, Yong Li, Hanan Samet:
Habit2vec: Trajectory Semantic Embedding for Living Pattern Recognition in Population. IEEE Trans. Mob. Comput. 19(5): 1096-1108 (2020) - [c194]Hanan Samet, Yunheng Han, John H. Kastner, Hong Wei:
Using Animation to Visualize Spatio-Temporal Varying COVID-19 Data. COVID@SIGSPATIAL 2020: 53-62 - [c193]John H. Kastner, Hanan Samet:
Visualizing SpatioTemporal Keyword Trends in Online News Articles. SIGSPATIAL/GIS 2020: 195-198 - [i7]John H. Kastner, Hong Wei, Hanan Samet:
Viewing the Progression of the Novel Corona Virus (COVID-19) with NewsStand. CoRR abs/2003.00107 (2020) - [i6]Anis Abboud, John H. Kastner, Hanan Samet:
Equal Area Breaks: A Classification Scheme for Data to Obtain an Evenly-colored Choropleth Map. CoRR abs/2005.01653 (2020) - [i5]Yunheng Han, Hanan Samet:
LiMITS: An Effective Approach for Trajectory Simplification. CoRR abs/2010.08622 (2020)
2010 – 2019
- 2019
- [j112]Yolanda Gil, Suzanne A. Pierce, Hassan A. Babaie, Arindam Banerjee, Kirk D. Borne, Gary S. Bust, Michelle Cheatham, Imme Ebert-Uphoff, Carla P. Gomes, Mary C. Hill, John D. Horel, Leslie Hsu, Jim Kinter, Craig A. Knoblock, David M. Krum, Vipin Kumar, Pierre F. J. Lermusiaux, Yan Liu, Chris North, Victor Pankratius, Shanan Peters, Beth Plale, Allen Pope, Sai Ravela, Juan Restrepo, Aaron J. Ridley, Hanan Samet, Shashi Shekhar:
Intelligent systems for geosciences: an essential research agenda. Commun. ACM 62(1): 76-84 (2019) - [j111]Hancheng Cao, Jagan Sankaranarayanan, Jie Feng, Yong Li, Hanan Samet:
Understanding Metropolitan Crowd Mobility via Mobile Cellular Accessing Data. ACM Trans. Spatial Algorithms Syst. 5(2): 8:1-8:18 (2019) - [j110]Samet Ayhan, Pablo Costas, Hanan Samet:
A Data-driven Framework for Long-Range Aircraft Conflict Detection and Resolution. ACM Trans. Spatial Algorithms Syst. 5(4): 24:1-24:23 (2019) - [c192]Hong Wei, Hao Zhou, Jagan Sankaranarayanan, Sudipta Sengupta, Hanan Samet:
DeLLe: Detecting Latest Local Events from Geotagged Tweets. LENS@SIGSPATIAL 2019: 4:1-4:10 - [c191]Samet Ayhan, Hanan Samet:
Data Management and Analytics System for Online Flight Conformance Monitoring and Anomaly Detection. SIGSPATIAL/GIS 2019: 219-228 - [c190]Munkh-Erdene Yadamjav, Zhifeng Bao, Farhana Murtaza Choudhury, Hanan Samet, Baihua Zheng:
Querying Continuous Recurrent Convoys of Interest. SIGSPATIAL/GIS 2019: 436-439 - [c189]Hong Wei, Janit Anjaria, Hanan Samet:
Learning Embeddings of Spatial, Textual and Temporal Entities in Geotagged Tweets. SIGSPATIAL/GIS 2019: 484-487 - 2018
- [j109]Mingzhao Li, Farhana Murtaza Choudhury, Zhifeng Bao, Hanan Samet, Timos Sellis:
ConcaveCubes: Supporting Cluster-based Geographical Visualization in Large Data Scale. Comput. Graph. Forum 37(3): 217-228 (2018) - [j108]Jianzhong Qi, Fei Zuo, Hanan Samet, Jia Cheng Yao:
K-Regret Queries Using Multiplicative Utility Functions. ACM Trans. Database Syst. 43(2): 10:1-10:41 (2018) - [c188]Munkh-Erdene Yadamjav, Farhana Murtaza Choudhury, Zhifeng Bao, Hanan Samet:
Efficient Multi-range Query Processing on Trajectories. ER 2018: 269-285 - [c187]Hong Wei, Jagan Sankaranarayanan, Hanan Samet:
Enhancing Local Live Tweet Stream to Detect News. LENS@SIGSPATIAL 2018: 4:1-4:10 - [c186]Shangfu Peng, Jagan Sankaranarayanan, Hanan Samet:
DOS: a spatial system offering extremely high-throughput road distance computations. SIGSPATIAL/GIS 2018: 199-208 - [c185]Samet Ayhan, Pablo Costas, Hanan Samet:
Prescriptive analytics system for long-range aircraft conflict detection and resolution. SIGSPATIAL/GIS 2018: 239-248 - [c184]Hong Wei, Hao Zhou, Jagan Sankaranarayanan, Sudipta Sengupta, Hanan Samet:
Detecting latest local events from geotagged tweet streams. SIGSPATIAL/GIS 2018: 520-523 - [c183]Hong Wei, Riccardo Fellegara, Yin Wang, Leila De Floriani, Hanan Samet:
Multi-level filtering to retrieve similar trajectories under the Fréchet distance. SIGSPATIAL/GIS 2018: 600-603 - [c182]Hanan Samet:
Sorting in Space and Words. ICDE 2018: 1719-1722 - [c181]Samet Ayhan, Pablo Costas, Hanan Samet:
Predicting Estimated Time of Arrival for Commercial Flights. KDD 2018: 33-42 - [c180]Hong Wei, Hao Zhou, Jagan Sankaranarayanan, Sudipta Sengupta, Hanan Samet:
Residual Convolutional LSTM for Tweet Count Prediction. WWW (Companion Volume) 2018: 1309-1316 - 2017
- [c179]Hong Wei, Jagan Sankaranarayanan, Hanan Samet:
Measuring Spatial Influence of Twitter Users by Interactions. LENS@SIGSPATIAL 2017: 2:1-2:10 - [c178]Faizan Wajid, Hong Wei, Hanan Samet:
Identifying Short-Names for Place Entities from Social Networks. LocalRec@SIGSPATIAL 2017: 4:1-4:4 - [c177]Hong Wei, Jagan Sankaranarayanan, Hanan Samet:
Finding and Tracking Local Twitter Users for News Detection. SIGSPATIAL/GIS 2017: 64:1-64:4 - [c176]Hao Li, Asim Kadav, Igor Durdanovic, Hanan Samet, Hans Peter Graf:
Pruning Filters for Efficient ConvNets. ICLR (Poster) 2017 - [c175]Hao Li, Soham De, Zheng Xu, Christoph Studer, Hanan Samet, Tom Goldstein:
Training Quantized Nets: A Deeper Understanding. NIPS 2017: 5811-5821 - [r2]Hanan Samet:
Foundations of Nearest Neighbor Queries in Euclidean Space. Encyclopedia of GIS 2017: 627-634 - [i4]Hao Li, Soham De, Zheng Xu, Christoph Studer, Hanan Samet, Tom Goldstein:
Training Quantized Nets: A Deeper Understanding. CoRR abs/1706.02379 (2017) - 2016
- [j107]Hanan Samet, Sarana Nutanong, Brendan C. Fruin:
Static presentation consistency issues in smartphone mapping apps. Commun. ACM 59(5): 88-98 (2016) - [j106]Hanan Samet, Sarana Nutanong, Brendan C. Fruin:
Dynamic presentation consistency issues in smartphone mapping apps. Commun. ACM 59(9): 58-67 (2016) - [j105]Paolo Montuschi, Edward J. McCluskey, Samarjit Chakraborty, Jason Cong, Ramón M. Rodríguez-Dagnino, Fred Douglis, Lieven Eeckhout, Gernot Heiser, Sushil Jajodia, Ruby B. Lee, Dinesh Manocha, Tomás F. Pena, Isabelle Puaut, Hanan Samet, Donatella Sciuto:
State of the Journal. IEEE Trans. Computers 65(7): 2014-2018 (2016) - [c174]Samet Ayhan, Hanan Samet:
Time series clustering of weather observations in predicting climb phase of aircraft trajectories. IWCTS@SIGSPATIAL 2016: 25-30 - [c173]Faizan Wajid, Hanan Samet:
CrimeStand: spatial tracking of criminal activity. SIGSPATIAL/GIS 2016: 81:1-81:4 - [c172]Shangfu Peng, Hanan Samet:
CDO: extremely high-throughput road distance computations on city road networks. SIGSPATIAL/GIS 2016: 84:1-84:4 - [c171]Shangfu Peng, Jagan Sankaranarayanan, Hanan Samet:
SPDO: High-throughput road distance computations on Spark using Distance Oracles. ICDE 2016: 1239-1250 - [c170]Hao Li, Shangfu Peng, Hanan Samet:
Streaming news image summarization. ICPR 2016: 1279-1284 - [c169]Samet Ayhan, Hanan Samet:
Aircraft Trajectory Prediction Made Easy with Predictive Analytics. KDD 2016: 21-30 - [c168]Hanan Samet:
Sorting in space: multidimensional data structures for computer graphics and vision applications. SIGGRAPH ASIA Courses 2016: 16:1-16:42 - [i3]Hao Li, Asim Kadav, Igor Durdanovic, Hanan Samet, Hans Peter Graf:
Pruning Filters for Efficient ConvNets. CoRR abs/1608.08710 (2016) - 2015
- [c167]Shangfu Peng, Hanan Samet:
Analytical queries on road networks: an experimental evaluation of two system architectures. SIGSPATIAL/GIS 2015: 1:1-1:10 - [c166]Yaron Kanza, Hanan Samet:
An online marketplace for geosocial data. SIGSPATIAL/GIS 2015: 10:1-10:4 - [c165]Ahmed Abdelkader, Emily M. Hand, Hanan Samet:
Brands in NewsStand: spatio-temporal browsing of business news. SIGSPATIAL/GIS 2015: 97:1-97:4 - [c164]Hanan Samet:
Place-based Information Systems - Textual Location Identification and Visualization. ICPRAM (1) 2015: IS-5 - [c163]Hanan Samet:
Location Specification and Representation in Multimedia Databases. ISM 2015: 615-619 - 2014
- [j104]Hanan Samet, Jagan Sankaranarayanan, Michael D. Lieberman, Marco D. Adelfio, Brendan C. Fruin, Jack M. Lotkowski, Daniele Panozzo, Jon Sperling, Benjamin E. Teitler:
Reading news with maps by exploiting spatial synonyms. Commun. ACM 57(10): 64-77 (2014) - [c162]Marco D. Adelfio, Hanan Samet:
Itinerary retrieval: travelers, like traveling salesmen, prefer efficient routes. GIR 2014: 1:1-1:8 - [c161]Hanan Samet:
Using minimaps to enable toponym resolution with an effective 100% rate of recall. GIR 2014: 9:1-9:8 - [c160]Rongjian Lan, Marco D. Adelfio, Hanan Samet:
Spatio-temporal disease tracking using news articles. HealthGIS 2014: 31-38 - [c159]Jinfeng Rao, Jimmy Lin, Hanan Samet:
Partitioning strategies for spatio-textual similarity join. BigSpatial@SIGSPATIAL 2014: 40-49 - [c158]Cheng Fu, Hanan Samet, Jagan Sankaranarayanan:
WeiboStand: capturing Chinese breaking news using Weibo "tweets". LBSN@SIGSPATIAL/GIS 2014: 41-48 - [c157]Gianluca Quercini, Hanan Samet:
Uncovering the spatial relatedness in Wikipedia. SIGSPATIAL/GIS 2014: 153-162 - [c156]Shangfu Peng, Hanan Samet, Marco D. Adelfio:
Viewing streaming spatially-referenced data at interactive rates. SIGSPATIAL/GIS 2014: 409-412 - [c155]Marco D. Adelfio, Hanan Samet:
Automated tabular itinerary visualization. SIGSPATIAL/GIS 2014: 593-596 - 2013
- [j103]Marco D. Adelfio, Hanan Samet:
Schema Extraction for Tabular Data on the Web. Proc. VLDB Endow. 6(6): 421-432 (2013) - [j102]Hanan Samet, Marco D. Adelfio, Brendan C. Fruin, Michael D. Lieberman, Jagan Sankaranarayanan:
PhotoStand: A Map Query Interface for a Database of News Photos. Proc. VLDB Endow. 6(12): 1350-1353 (2013) - [c154]Benjamin E. Teitler, Jagan Sankaranarayanan, Hanan Samet, Marco D. Adelfio:
Online Document Clustering Using GPUs. ADBIS (2) 2013: 245-254 - [c153]Sarana Nutanong, Marco D. Adelfio, Hanan Samet:
An efficient layout method for a large collection of geographic data entries. EDBT 2013: 717-720 - [c152]Marco D. Adelfio, Hanan Samet:
Structured toponym resolution using combined hierarchical place categories. GIR 2013: 49-56 - [c151]Nick Gramsky, Hanan Samet:
Seeder finder: identifying additional needles in the Twitter haystack. LBSN 2013: 44-53 - [c150]Chang Liu, Brendan C. Fruin, Hanan Samet:
SAC: semantic adaptive caching for spatial mobile applications. SIGSPATIAL/GIS 2013: 174-183 - [c149]Marco D. Adelfio, Hanan Samet:
GeoWhiz: toponym resolution using common categories. SIGSPATIAL/GIS 2013: 522-525 - [c148]Sarana Nutanong, Hanan Samet:
Memory-efficient algorithms for spatial network queries. ICDE 2013: 649-660 - [c147]Hanan Samet:
Sorting in Space: Multidimensional, spatial, and metric data structures for applications in spatial databases, geographic information systems (GIS), and location-based services. ICDE 2013: 1254-1257 - [c146]Hanan Samet, Jagan Sankaranarayanan, Michael Auerbach:
Indexing methods for moving object databases: games and other applications. SIGMOD Conference 2013: 169-180 - 2012
- [c145]Shen-Shyang Ho, Mike Lieberman, Pu Wang, Hanan Samet:
Mining future spatiotemporal events and their sentiment from online news articles for location-aware recommendation system. MobiGIS 2012: 25-32 - [c144]Rongjian Lan, Michael D. Lieberman, Hanan Samet:
The picture of health: map-based, collaborative spatio-temporal disease tracking. HealthGIS 2012: 27-35 - [c143]Hanan Samet, Brendan C. Fruin, Sarana Nutanong:
Duking it out at the smartphone mobile app mapping API corral: Apple, Google, and the competition. MobiGIS 2012: 41-48 - [c142]Sarana Nutanong, Marco D. Adelfio, Hanan Samet:
Multiresolution select-distinct queries on large geographic point sets. SIGSPATIAL/GIS 2012: 159-168 - [c141]Michael D. Lieberman, Hanan Samet:
Supporting rapid processing and interactive map-based exploration of streaming news. SIGSPATIAL/GIS 2012: 179-188 - [c140]Brendan C. Fruin, Hanan Samet, Jagan Sankaranarayanan:
TweetPhoto: photos from news tweets. SIGSPATIAL/GIS 2012: 582-585 - [c139]Michael D. Lieberman, Hanan Samet:
Adaptive context features for toponym resolution in streaming news. SIGIR 2012: 731-740 - 2011
- [j101]Sarana Nutanong, Edwin H. Jacox, Hanan Samet:
An Incremental Hausdorff Distance Calculation Algorithm. Proc. VLDB Endow. 4(8): 506-517 (2011) - [c138]Alan Jackoway, Hanan Samet, Jagan Sankaranarayanan:
Identification of live news events using Twitter. GIS-LBSN 2011: 25-32 - [c137]Marco D. Adelfio, Sarana Nutanong, Hanan Samet:
Similarity search on a large collection of point sets. GIS 2011: 132-141 - [c136]Marco D. Adelfio, Sarana Nutanong, Hanan Samet:
Searching web documents as location sets. GIS 2011: 489-492 - [c135]Hanan Samet, Marco D. Adelfio, Brendan C. Fruin, Michael D. Lieberman, Benjamin E. Teitler:
Porting a web-based mapping application to a smartphone app. GIS 2011: 525-528 - [c134]Michael D. Lieberman, Hanan Samet:
Multifaceted toponym recognition for streaming news. SIGIR 2011: 843-852 - [c133]Hanan Samet, Benjamin E. Teitler, Marco D. Adelfio, Michael D. Lieberman:
Adapting a map query interface for a gesturing touch screen interface. WWW (Companion Volume) 2011: 257-260 - 2010
- [j100]Jagan Sankaranarayanan, Hanan Samet:
Roads Belong in Databases. IEEE Data Eng. Bull. 33(2): 4-11 (2010) - [j99]Hanan Samet:
Techniques for Similarity Searching in Multimedia Databases. Proc. VLDB Endow. 3(2): 1649-1650 (2010) - [j98]Jagan Sankaranarayanan, Hanan Samet:
Query Processing Using Distance Oracles for Spatial Networks. IEEE Trans. Knowl. Data Eng. 22(8): 1158-1175 (2010) - [c132]Michael D. Lieberman, Hanan Samet, Jagan Sankaranarayanan:
Geotagging: using proximity, sibling, and prominence clues to understand comma groups. GIR 2010 - [c131]Gianluca Quercini, Hanan Samet, Jagan Sankaranarayanan, Michael D. Lieberman:
Determining the spatial reader scopes of news sources using local lexicons. GIS 2010: 43-52 - [c130]Marco D. Adelfio, Michael D. Lieberman, Hanan Samet, Kashif A. Firozvi:
Ontuition: intuitive data exploration via ontology navigation. GIS 2010: 540-541 - [c129]Michael D. Lieberman, Hanan Samet, Jagan Sankaranarayanan:
Geotagging with local lexicons to build indexes for textually-specified spatial data. ICDE 2010: 201-212 - [c128]Jagan Sankaranarayanan, Hanan Samet:
Images in News. ICPR 2010: 3240-3243 - [c127]Hanan Samet:
Sorting in space: multidimensional, spatial, and metric data structures for computer graphics applications. SIGGRAPH ASIA (Courses) 2010: 3:1-3:52
2000 – 2009
- 2009
- [j97]Jagan Sankaranarayanan, Hanan Samet, Houman Alborzi:
Path Oracles for Spatial Networks. Proc. VLDB Endow. 2(1): 1210-1221 (2009) - [c126]Jagan Sankaranarayanan, Hanan Samet, Benjamin E. Teitler, Michael D. Lieberman, Jon Sperling:
TwitterStand: news in tweets. GIS 2009: 42-51 - [c125]Michael D. Lieberman, Hanan Samet, Jagan Sankaranarayanan, Jon Sperling:
Spatio-textual spreadsheets: geotagging via spatial coherence. GIS 2009: 524-527 - [c124]