A language modeling approach to information retrieval
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval
A study of smoothing methods for language models applied to Ad Hoc information retrieval
Proceedings of the 24th annual international ACM SIGIR conference on Research and development in information retrieval
Flickr tag recommendation based on collective knowledge
Proceedings of the 17th international conference on World Wide Web
Geographic intention and modification in web search
International Journal of Geographical Information Science
Discovering users' specific geo intention in web search
Proceedings of the 18th international conference on World wide web
Proceedings of the 18th international conference on World wide web
Placing flickr photos on a map
Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval
Is it really about me?: message content in social awareness streams
Proceedings of the 2010 ACM conference on Computer supported cooperative work
A latent variable model for geographic lexical variation
EMNLP '10 Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing
You are where you tweet: a content-based approach to geo-locating twitter users
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
Tweets from Justin Bieber's heart: the dynamics of the location field in user profiles
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Overview of the third international workshop on search and mining user-generated contents
Proceedings of the 20th ACM international conference on Information and knowledge management
GLOCAL: event-based retrieval of networked media
Proceedings of the 21st international conference companion on World Wide Web
Location inference using microblog messages
Proceedings of the 21st international conference companion on World Wide Web
Placing images on the world map: a microblog-based enrichment approach
SIGIR '12 Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval
Supervised text-based geolocation using language models on an adaptive grid
EMNLP-CoNLL '12 Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning
TweetPhoto: photos from news tweets
Proceedings of the 20th International Conference on Advances in Geographic Information Systems
@Phillies Tweeting from Philly? Predicting Twitter User Locations with Spatial Word Usage
ASONAM '12 Proceedings of the 2012 International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2012)
Who, where, when and what: discover spatio-temporal topics for twitter users
Proceedings of the 19th ACM SIGKDD international conference on Knowledge discovery and data mining
Location extraction from disaster-related microblogs
Proceedings of the 22nd international conference on World Wide Web companion
Exploiting innocuous activity for correlating users across sites
Proceedings of the 22nd international conference on World Wide Web
Location-specific tweet detection and topic summarization in Twitter
Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining
Human sensing for smart cities
Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining
Landmark-based user location inference in social media
Proceedings of the first ACM conference on Online social networks
Inferring the origin locations of tweets with quantitative confidence
Proceedings of the 17th ACM conference on Computer supported cooperative work & social computing
Every move you make I'll be watching you: geographical focus detection on Twitter
Proceedings of the 7th Workshop on Geographic Information Retrieval
#Santiago is not #Chile, or is it?: a model to normalize social media impact
Proceedings of the 2013 Chilean Conference on Human - Computer Interaction
An algorithm for local geoparsing of microtext
Geoinformatica
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Social media such as Twitter generate large quantities of data about what a person is thinking and doing in a particular location. We leverage this data to build models of locations to improve our understanding of a user's geographic context. Understanding the user's geographic context can in turn enable a variety of services that allow us to present information, recommend businesses and services, and place advertisements that are relevant at a hyper-local level. In this paper we create language models of locations using coordinates extracted from geotagged Twitter data. We model locations at varying levels of granularity, from the zip code to the country level. We measure the accuracy of these models by the degree to which we can predict the location of an individual tweet, and further by the accuracy with which we can predict the location of a user. We find that we can meet the performance of the industry standard tool for predicting both the tweet and the user at the country, state and city levels, and far exceed its performance at the hyper-local level, achieving a three- to ten-fold increase in accuracy at the zip code level.