Samuel Stehle


My background is in GIS, remote sensing, and computer science, so I approach spatial questions through customization and algorithm development. Mostly, I have focused on quantitative analysis of spatio-temporal patterns of political events. My masters thesis was titled "Pattern Matching via Sequence Alignment: Analyzing Spatio-Temporal Patterns and their Distances."


In my dissertation, I expand on current approaches for representing global geopolitics through digital news media. I use Latent Dirichlet Allocation to derive key terms and topics from the text of news and social media posts and map that semantic space onto geographic space. I demonstrate the process by studying the geopolitics of sports competition, especially with respect to the Catalan independence movement and the British Commonwealth Games


Research Interests

  • visual analytics
  • geopolitics
  • event detection
  • pattern recognition
  • politics and sport
  • time geography
  • Java
  • Python

Research Focus

spatio-temporal analysis of news and social media



  • M.S. Geography, 2013, Penn State
  • B.S. Geography, Computer Science (Minor) 2010, University of Utah


Peuquet, D.J., A.C. Robinson, S. Stehle, F.A. Hardisty, W. Luo. 2015. A method for discovery

and analysis of temporal patterns in complex event data. International Journal of

Geographical Information Science, 29(9) 


Stehle, S., D. Peuquet. 2015. Analyzing Spatio-Temporal Patterns and their Evolution via 

Sequence Alignment. Spatial Cognition and Computation. 15(2)


Caragea, C., A. Squicciarini, S. Stehle, K. Neppalli, and A. Tapia. 2014. Mapping Moods: Geo-

Mapped Sentiment Analysis During Hurricane Sandy. Proceedings of the 11th 

International ISCRAM Conference - University Park, PA. May 2014. S.R. Hiltz, M.S. 

Pfaff, L. Plotnick, A.C. Robinson eds.


Arva, B., J. Beieler, B. Fisher, G. Lara, P. A. Schrodt, W. Song, M. Sowell, and S. Stehle. 2013. 

Improving Forecasts of International Events of Interest. Paper presented at European 

Political Science Association Annual General Conference, Barcelona, Spain, June 20-



Stehle, S. 2015 Re-Reading Geopolitics in the News: Computation beyond Event-Based

Representation. Paper presented at Regional Science Association International meeting,

Portland, OR. Nov. 12-15


Stehle, S. 2015 News and Events, Politics and Sport: Reading Geopolitical Conveyance in

Digital News Media. Paper presented at the Conference on Spatial Information Theory

(COSIT) Doctoral Colloquium. Santa Fe, NM, Oct. 12-16


Stehle, S. 2015 Event Data, Spatio-Temporal Analysis, and Digital News Media:

A Critical Examination. Paper presented at the Annual Meeting of the Association

of American Geographers. Chicago, IL. April 21-25


Stehle, S. 2014. Scalar Analysis and Event Data Analytics: Assessing the Potential 

Contribution of Big Data for Feminist Geopolitics. Paper presented at the Annual 

Meeting of the Association of American Geographers. Tampa, FL. April 8-12


Peuquet, D. and S. Stehle 2013. STempo: An Integrated Statistical and Visualization 

Environment for Discovery and Analysis of Patterns in Complex Space-Time Event 

Data. NGA NARP Sympsium. Washington D.C. Sept 10-12


Stehle, S. 2013. Pattern Matching via Sequence Alignment: Analysing Spatio-Temporal 

Distances. GeoComputation 2013, Wuhan, China, May 23-25


Supporting Women in Geography (treasurer 2015-2016)

Association of American Geographers

Gamma Theta Upsilon

Society for American Baseball Research (SABR)