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1
Sorting in space: multidimensional data structures for computer graphics and vision applications
Hanan Samet
November 2016
SA '16: SIGGRAPH ASIA 2016 Courses
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 11, Downloads (12 Months): 96, Downloads (Overall): 96
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The representation of spatial data is important in game programming, computer graphics, visualization, solid modeling, computer vision and geographic information systems (GIS). They are rooted in the intersection of computer vision and graphics. Recently, there has been much interest in hierarchical representations such as quadtrees, octrees, and pyramids which are ...
2
Time series clustering of weather observations in predicting climb phase of aircraft trajectories
Samet Ayhan,
Hanan Samet
October 2016
IWCTS '16: Proceedings of the 9th ACM SIGSPATIAL International Workshop on Computational Transportation Science
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 7, Downloads (12 Months): 58, Downloads (Overall): 58
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Reliable trajectory prediction is paramount in Air Traffic Management (ATM) as it can increase safety, capacity, and efficiency, and lead to commensurate fuel savings and emission reductions. Inherent inaccuracies in forecasting winds and temperatures often result in large prediction errors when a deterministic approach is used. A stochastic approach can ...
Keywords:
aircraft trajectory prediction, hidden Markov model, predictive analytics, time series clustering
3
CrimeStand: spatial tracking of criminal activity
October 2016
GIS '16: Proceedings of the 24th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 10, Downloads (12 Months): 50, Downloads (Overall): 50
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Pursuing criminal activity is tied with understanding illegal or unlawful actions taken on opportunity within a geographic location. Mapping such activities can aid significantly in determining the health of a region, and the vicissitudes of civilian life. Methods to track crime and criminal activity after the fact by mapping news ...
Keywords:
NewsStand, text mining, GIS, geotagging
4
CDO: extremely high-throughput road distance computations on city road networks
Shangfu Peng,
Hanan Samet
October 2016
GIS '16: Proceedings of the 24th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 8, Downloads (12 Months): 20, Downloads (Overall): 20
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Some analytic queries on road networks, usually concentrating in a local area spanning several cities, need a high-throughput solution such as performing millions of shortest distance computations per second. However, most existing solutions achieve less than 5, 000 shortest distance computations per second per machine even with multi-threads. We demonstrate ...
Keywords:
city road network, distance oracle, high-throughput, spatial analytic query
5
Dynamic presentation consistency issues in smartphone mapping apps
August 2016
Communications of the ACM: Volume 59 Issue 9, September 2016
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 4, Downloads (12 Months): 260, Downloads (Overall): 260
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Smartphone mapping apps routinely fail to follow centuries-old mapmaking dynamic consistency principles and practices.
6
Aircraft Trajectory Prediction Made Easy with Predictive Analytics
Samet Ayhan,
Hanan Samet
August 2016
KDD '16: Proceedings of the 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 17, Downloads (12 Months): 283, Downloads (Overall): 283
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At the heart of Air Traffic Management (ATM) lies the Decision Support Systems (DST) that rely upon accurate trajectory prediction to determine how the airspace will look like in the future to make better decisions and advisories. Dealing with airspace that is prone to congestion due to environmental factors still ...
Keywords:
aircraft trajectory prediction, predictive analytics, air traffic management, hidden markov model, time series
7
Static presentation consistency issues in smartphone mapping apps
April 2016
Communications of the ACM: Volume 59 Issue 5, May 2016
Publisher: ACM
Bibliometrics:
Citation Count: 3
Downloads (6 Weeks): 6, Downloads (12 Months): 133, Downloads (Overall): 261
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Comparing smartphone mapping apps leads to unexpected surprises.
8
Analytical queries on road networks: an experimental evaluation of two system architectures
Shangfu Peng,
Hanan Samet
November 2015
SIGSPATIAL '15: Proceedings of the 23rd SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 8, Downloads (12 Months): 87, Downloads (Overall): 107
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Spatial analytical queries on road networks typically perform hundreds of thousands to several millions of shortest distance computations in the process of producing results. These queries require architectures that can compute a large number of network distances. Two architectures are evaluated on a variety of spatial analytical queries on road ...
Keywords:
system architecture, distance oracle, road network, spatial analytical query
9
Brands in NewsStand: spatio-temporal browsing of business news
Ahmed Abdelkader,
Emily Hand,
Hanan Samet
November 2015
SIGSPATIAL '15: Proceedings of the 23rd SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 3
Downloads (6 Weeks): 3, Downloads (12 Months): 29, Downloads (Overall): 41
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The NewsStand system enables the use of a map query interface to retrieve news articles associated with the principal locations that they mention collected as a result of monitoring the output of over 10,000 RSS news feeds, made available within minutes of publication. NewsStand has been enhanced to allow using ...
Keywords:
geotagging, map query interface, knowledge discovery, NewsStand, business intelligence, text mining
10
An online marketplace for geosocial data
November 2015
SIGSPATIAL '15: Proceedings of the 23rd SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 6, Downloads (12 Months): 37, Downloads (Overall): 58
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When recording their GPS trajectories or posting geo-tagged content on social networks, people produce social spatio-temporal data that can be stored and shared, namely geosocial data. Much of these spatio-temporal data can be used by organizations and applications, for statistical analysis or to provide services that are based on data. ...
Keywords:
geo-social, socio-spatial, exchange, interoperability, marketplace, online, personal data, privacy
11
Uncovering the spatial relatedness in Wikipedia
Gianluca Quercini,
Hanan Samet
November 2014
SIGSPATIAL '14: Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 5
Downloads (6 Weeks): 4, Downloads (12 Months): 20, Downloads (Overall): 105
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In a previous work we showed that the knowledge of the spatial reader scope of a news source, that is the geographical location for which its content has been primarily produced, plays an important role in disambiguating toponyms in news articles. The determination of the spatial reader scope of a ...
Keywords:
spatial relatedness, toponym disambiguation, geotagging
12
Itinerary retrieval: travelers, like traveling salesmen, prefer efficient routes
Marco D. Adelfio,
Hanan Samet
November 2014
GIR '14: Proceedings of the 8th Workshop on Geographic Information Retrieval
Publisher: ACM
Bibliometrics:
Citation Count: 4
Downloads (6 Weeks): 5, Downloads (12 Months): 35, Downloads (Overall): 60
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Internet users share large quantities of text and multimedia content that becomes easily accessible to others via hyperlinks and search engine results. However, structured datasets generally lack this level of exposure. One example is the travel itinerary, which many Internet users post online in the form of a spreadsheet or ...
Keywords:
route efficiency, travel itineraries, trajectory retrieval
13
Using minimaps to enable toponym resolution with an effective 100% rate of recall
Hanan Samet
November 2014
GIR '14: Proceedings of the 8th Workshop on Geographic Information Retrieval
Publisher: ACM
Bibliometrics:
Citation Count: 6
Downloads (6 Weeks): 3, Downloads (12 Months): 13, Downloads (Overall): 56
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A number of systems have been recently constructed that make use of a map query interface to access documents by the locations that they mention. These mentions are often ambiguous in the sense that many interpretations exist for the locations which are not always expressed along with all the necessary ...
Keywords:
recall, toponym resolution, minimap, geotagging, precision
14
Partitioning strategies for spatio-textual similarity join
November 2014
BigSpatial '14: Proceedings of the 3rd ACM SIGSPATIAL International Workshop on Analytics for Big Geospatial Data
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 4, Downloads (12 Months): 29, Downloads (Overall): 121
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Given a collection of geo-tagged objects with associated textual descriptors, the spatio-textual similarity join (STJoin) problem is to identify all pairs of similar objects that are close in distance. This task, which is useful in localized recommendations and other applications, is challenging since computing the join is super-linear with respect ...
Keywords:
geotagged data, spatio-textual similarity join, indexing
15
A look into Twitter hashtag discovery and generation
Eric Krokos,
Hanan Samet,
Jagan Sankaranarayanan
November 2014
LBSN '14: Proceedings of the 7th ACM SIGSPATIAL International Workshop on Location-Based Social Networks
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 3, Downloads (12 Months): 14, Downloads (Overall): 14
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Twitter is a micro-blogging site that allows users and companies to post brief pieces of information called Tweets . Some of the tweets contain keywords such as Hashtags denoted with a # , essentially one word summaries of either the topic or emotion of the tweet. The goal of this ...
Keywords:
Sentiment Analysis, Hashtags, Twitter, Natural Language Processing, News, Tweet, Web, Topic Classification
16
Spatio-temporal disease tracking using news articles
Rongjian Lan,
Marco D. Adelfio,
Hanan Samet
November 2014
HealthGIS '14: Proceedings of the Third ACM SIGSPATIAL International Workshop on the Use of GIS in Public Health
Publisher: ACM
Bibliometrics:
Citation Count: 5
Downloads (6 Weeks): 3, Downloads (12 Months): 25, Downloads (Overall): 76
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Geographical Information Systems have been increasingly used to aid the prompt detection, tracking, and analysis of disease outbreaks. Web content which is full of health-related data also serves as a useful resource for disease outbreak analysis. News posts often report the initial outbreak of diseases and contain valuable information that ...
Keywords:
disease tracking, spatio-temporal, GIS, geotagging
17
Marco D. Adelfio,
Hanan Samet
November 2014
SIGSPATIAL '14: Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 3, Downloads (12 Months): 12, Downloads (Overall): 35
Full text available:
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Advances in geographic information extraction have exposed previously untapped resources, such as many travel itineraries found in HTML tables and spreadsheets on the Web. In the general sense, itineraries differ from the related concepts of routes and trajectories in that the precise paths between stopping points are of far less ...
Keywords:
geographic visualization, map labeling, itinerary layout
18
Viewing streaming spatially-referenced data at interactive rates
Shangfu Peng,
Hanan Samet,
Marco D. Adelfio
November 2014
SIGSPATIAL '14: Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Publisher: ACM
Bibliometrics:
Citation Count: 3
Downloads (6 Weeks): 6, Downloads (12 Months): 23, Downloads (Overall): 69
Full text available:
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Given the increasing prevalence of streaming spatially-referenced datasets resulting from sensor networks usually consisting of text objects of varying length (termed labels) as well as streaming spatially oriented queries leads to closer scrutiny of mapping interfaces to present the data to users. These interfaces must cope with the fact that ...
Keywords:
dynamic map labeling, label selection, streaming data
19
WeiboStand: capturing Chinese breaking news using Weibo "tweets"
Cheng Fu,
Hanan Samet,
Jagan Sankaranarayanan
November 2014
LBSN '14: Proceedings of the 7th ACM SIGSPATIAL International Workshop on Location-Based Social Networks
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 8, Downloads (12 Months): 29, Downloads (Overall): 41
Full text available:
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Weibo is the premier microblog service in China, which is nicknamed as the "Chinese Twitter". Weibo messages consist of text messages, short links, images, audio and video. Its text is restricted to 140 Chinese characters. Since Twitter is blocked in the mainland of China, Weibo is the dominant microblog service ...
Keywords:
geotagging, weibo, news
20
Reading news with maps by exploiting spatial synonyms
Hanan Samet,
Jagan Sankaranarayanan,
Michael D. Lieberman,
Marco D. Adelfio,
Brendan C. Fruin,
Jack M. Lotkowski,
Daniele Panozzo,
Jon Sperling,
Benjamin E. Teitler
September 2014
Communications of the ACM: Volume 57 Issue 10, October 2014
Publisher: ACM
Bibliometrics:
Citation Count: 21
Downloads (6 Weeks): 28, Downloads (12 Months): 240, Downloads (Overall): 31,329
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PDF Chinese translation
Use this map query interface to search the world, even when not sure what information you seek.
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