Kathleen Stewart works in the area of geographic information science with a particular interest in temporal GIS. This includes topics such as moving objects research (e.g., space-time trajectory modeling and space-time scheduling) and event modeling for dynamic GIS. She is interested in topics relating to spatiotemporal information retrieval, i.e., computational methods for automatically acquiring meaningful space-time information from text sources, and space-time accessibility for different domains including healthcare services. She is also interested in topics relating to modeling geospatial semantics including geospatial ontologies and their role for geographic information system design. She teaches courses on spatiotemporal data modeling, geographic database design, geovisualization, and fundamentals of geographic information science. Support of her research has been provided by agencies including the National Science Foundation, IARPA, and the National Geospatial-Intelligence Agency among others. She is the Director of Graduate Studies for the Department of Geographical and Sustainablity Sciences. She was a UI College of Liberal Arts and Sciences Dean's Scholar from 2010 through 2012.
Dr. Stewart is an associate editor for Computers, Environment, and Urban Systems. She serves on the editorial board of The International Journal of Geographical Information Science (IJGIS), Transactions in GIS, and the open-access journal Journal of Spatial Information Science (JOSIS).
She is one of the co-organizers of the COSIT 2013 Workshop ‘Spatio-temporal theories and research for environmental, urban and social sciences: Where do we stand?’ to be held in Scarborough, UK in September 2013. She is also serving as program co-chair for GIScience 2014 to be held in Vienna, Austria in September 2014. Recently, she helped co-organize the symposium on Space-Time Integration in GIS and GIScience held at the AAG Annual Meeting in Seattle, WA in 2011. She served as the program co-chair for the International Conference on Spatial Information Theory (COSIT 2009) held in Aber Wrac'h, France in September 2009. She is a member of numerous program committees including the program committee for the 11th International Conference on Spatial Information Theory (COSIT 2013), and the 7th International Conference on GIScience (GIScience 2012) among others.
She gave the invited Transactions in GIS plenary presentation at the AAG Annual Meeting 2012 and has given numerous other invited presentations at conferences and workshops both nationally and internationally. She is former chair of the Research Committee of the University Consortium for Geographic Information Science (UCGIS) (2010-2012).
Please check out our NSF-supported IGERT doctoral program, “Geoinformatics for Environmental and Energy Modeling and Prediction (GEEMaP)” at the University of Iowa. See here for more details. This is a very exciting opportunity for graduate study in our Department.
Examples of research projects
- Spatiotemporal flood response and building evacuation system for The University of Iowa
- Spatiotemporal accessibility to IVF care in Iowa
- Geospatial modeling and maternal prenatal exposure to selected drinking water contaminants and stillbirth occurrence in Iowa
- Geospatial semantic modeling for region discounting
Recent and upcoming activities:
- ACM SIGSpatial Conference 2013, Orlando, FL, November 2013
- COSIT 2013, Scarborough UK, September 2013
- Advances in Geospatial Technologies Workshop, Argonne National Lab, May 2013
- AAG, Los Angeles, April 2013
- 044: 005 Foundations of GIScience (Fall 2012, Fall 2013)
- 044:029 First-Year Seminar: More Than Just a Map (Fall 2013)
- 044:109 Introduction to Geographic Visualization (Spring 2011)
- 044:141 Introduction to Geographic Databases (Fall 2011, Fall 2013)
- 044:197 Topics in Spatial Cognition (Spring 2011)
- 044:197 Introduction to Geoinformatics (Fall 2011, Fall 2012)
- Junchuan Fan, PhD in Geography, The University of Iowa, 2010 - present, Space-time Activity Space Modeling
- Pedram Gharani, The University of Iowa, 2012- present, Spatiotemporal accessiblity
- Jon Goergen, PhD in Geography, The University of Iowa, 2011 - present, Extreme heat events modeling
- Shane Hubbard, PhD in Geography, The University of Iowa, 2008 - present, Spatiotemporal flood response and risk modeling
- Wei Wang, PhD in Geography, The University of Iowa, 2008 - present, Spatiotemporal and semantic information retrieval
- Emily White, PhD in Geography, The University of Iowa 2010- present, Spatiotemporal ontologies and semantic tagging
Interested in being a graduate research assistant? Contact me at firstname.lastname@example.org
- Co-PI, Geospatial and sociodemographic distribution and determinants of in vitro fertilization (IVF) care in the rural midwest, American Society for Reproductive Medicine, 2013-2014
- Co-PI, Maternal prenatal exposure to selected drinking water contaminants and stillbirth Ooccurrence in Iowa, Environmental Health Science Research Center, The University of Iowa, 2013-2014
- PI, Semantic methods for geospatial region discounting, IARPA Finder, 2012-2013 (sub-award via ARA Associates), 2012-2013
- Co-PI, Geospatial distribution and determinants of in vitro fertilization (IVF) care in Iowa, The University of Iowa, Social Sciences Funding Program, 2012-13
- Co-PI, IGERT: Geoinformatics for Environmental and Energy Modeling and Prediction (GEEMaP), National Science Foundation, 2010-2015
- PI, A spatiotemporal model for flood evacuation, The University of Iowa, 2010 - 2011
- PI (subcontract), Mapping Hazards and Mitigation Infrastructure for the City of Des Moines, IA, City of Des Moines, IA, 2010-2012
- PI, Modeling Community Response to Natural Disaster, National Science Foundation, NSF SGER Research, 2008
- Co-PI,Simulating Spatiotemporal Interactions of Mobile Entities, National Geospatial-Intelligence Agency, 2008-2010
- PI, Spatio-temporal Data Fusion, National Geospatial-Intelligence Agency, 2005-2008
- Co-PI, Workshop on Computation and Visualization for the Understanding of Dynamics in Geographic Domains, Disruptive Technology Office/University Consortium for Geographic Information Science (UCGIS), 2006
- PI, Spatio-temporal Panning and Zooming, National Geospatial-Intelligence Agency and Geography and Regional Science, National Science Foundation, 2000-2003
Books and Edited Volumes
Stewart Hornsby, K., C. Claramunt, M. Denis, G. Ligozat, (Eds.) (2009) Spatial Information Theory, 9th International Conference on Spatial Information Theory, COSIT 2009, Aber Wrac'h, France, September 21-25, 2009, Proceedings, Lecture Notes in Computer Science, Vol. 5756, Springer, Berlin.
Stewart Hornsby, K. (Ed.) (2007) Ontology for the Intelligence Community: towards effective exploitation and integration of intelligence resources, Proceedings of OIC-2007, November 2007, Columbia, MD.
Hornsby, K., and M. Worboys (Eds.) (2004) Special issue on event-oriented approaches for geographic information science, Spatial Cognition and Computation, 4(1).
Roddick, J. and K. Hornsby (Eds.) Proceedings of the International Workshop on Temporal, Spatial, and Spatio-temporal Data Mining, TSDM2000, Lyon, France, Lecture Notes in Artificial Intelligence, 2007, Springer, 2001.
Refereed Journal Articles
Stewart K., J. Fan, and E. White (In press) Thinking about space-time connections: spatiotemporal scheduling of individual activities Transactions in GIS.
Stewart, K., J. Glanville, and D. Bennett (In press) Exploring spatiotemporal and social network factors in community response to a major flood disaster, The Professional Geographer.
Hubbard S., and K. Stewart Hornsby (2011) Modeling alternative sequences of events in dynamic geographic domains, Transactions in GIS, 15(5): 557-575.
Kulik,I., K. Stewart Hornsby, and I. Bishop (2011) Modeling geospatial trend changes in vegetation monitoring data, Computers, Environment and Urban Systems, 35:1, 45-56.
Nixon, V. and K. Stewart Hornsby (2010) Using geolifespans to model dynamic geographic domains, The International Journal of Geographical Information Science, 24:9, 1289-1308.
Stewart Hornsby, K. and K. Joshi (2010) Combining ontologies to automatically generate temporal perspectives of geospatial domains, Geoinformatica, 14 (4): 481- 505. (available online http://www.springerlink.com/openurl.asp?genre=article&id=doi:10.1007/s10...)
Stewart Hornsby, K. and Li, N. (2009) A conceptual framework for modeling dynamic paths from natural language expressions, Transactions in GIS, 13(s1): 27-45.
Stewart Hornsby, K. and K. King (2008), Modeling Motion Relations for Moving Objects on Road Networks, Geoinformatica, 12(4): 477-495.
Hornsby, K. and S. Cole (2007) Modeling moving geospatial objects from an event-based perspective,Transactions in GIS, 11(4): 555-573.
Campos, J., K. Hornsby, M. Egenhofer (2003) A model for exploring virtual reality environments, Journal of Visual Languages and Computing, Elsevier Press, 14(5): 471-494.
Hornsby, K. and M. Egenhofer (2002) Modeling moving objects over multiple granularities, Special issue on Spatial and Temporal Granularity, Annals of Mathematics and Artificial Intelligence, Kluwer Academic Press. 36:177-194.
Hornsby, K. (2001) Temporal zooming, Transactions in GIS. 5(3): 255-272.
Hornsby, K. and M. Egenhofer (2000) Identity-based change: a foundation for spatio-temporal knowledge representation, International Journal of Geographical Information Science.14(3): 207-224.
Refereed Conference Proceedings and Chapters in Books
Wang, W., and K. Stewart (In press) Creating spatiotemporal semantic maps from web text documents In: M-P. Kwan, D. Richardson, D. Wang, and C. Zhou, Space-Time Integration in Geography and GIScience: Research Frontiers in the US and China, Springer, Dordrecht.
Mount, J., D. Bennett, and K. Stewart (2012) Space-time ribbons, In. O. Huisman and T. Neutens, Proceedings of Time-geographic Information Science, A Workshop on Time Geography, GIScience 2012, Columbus, OH.
White, E. and K. Stewart (2011) Modeling geospatial barriers, First ACM SIGSPATIAL International Workshop on Spatial Semantics and Ontologies (SSO) 2011, Chicago, IL.
Stewart Hornsby, K. and Wang, W. (2010) Representing dynamic phenomena based on spatiotemporal information extracted from web documents. Extended Abstracts, GIScience Conference 2010, In press.
Stewart Hornsby, K. and Li, N. (2009) Modeling spatiotemporal paths for single moving objects, In: G. Navratil (Ed.) Research Trends in Geographic Information Science, Lecture Notes in Geoinformation and Cartography, Springer, Berlin, 153-170.
Stewart Hornsby, K. (2008) Modeling moving objects: future research possibilities, Proceedings of the Colloquium for Andrew U. Frank's 60th Birthday, Technical Report, Vienna University of Technology,117-124.
Stewart Hornsby, K. and K. King (2008) Linking geosensor network data and ontologies for a transportation domain, In: S. Nittel, A. Labrinidis, and A. Stefanidis (eds). Advances in Geosensor Networks, October 2006, Lecture Notes in Computer Science 4540, Springer, Berlin, 191-209.
Mau, I., K. Hornsby and I. Bishop (2007) Modeling geospatial events and impacts through qualitative change, Proceedings of the International Conference on Spatial Cognition, Spatial Cognition 2006, Lecture Notes in Artifical Intelligence, 4387, Springer, Berlin, 156-174.
Cole, S. and K. Hornsby (2005) Modeling Noteworthy Events in a Geospatial Domain, Proceedings of the First International Conference on Geospatial Semantics, GeoS 2005, Lecture Notes in Computer Science, 3799, Springer, Berlin, pp. 78-92.
Hall, S. and K. Hornsby (2005) Ordering events for dynamic geospatial domains, in A. Cohn and D. Mark (eds.) Proceedings of the Seventh International Conference on Spatial Information Theory, COSIT 2005, Lecture Notes in Computer Science 3693, Springer, Berlin, pp. 330-346.
Hornsby, K. (2004) Retrieving event-based semantics from images, Proceedings of the IEEE Sixth International Symposium on Multimedia Software Engineering, 13-15 December 2004, Miami, FL, IEEE Computer Society, pp. 529-536.
Campos, J. and K. Hornsby (2004) Temporal constraints between cyclic geographic events, Proceedings of GeoInfo 2004, Campos do Jordao, Brazil, November 22-24, 2004.
Worboys, M. and K. Hornsby (2004) From objects to events: GEM, the geospatial event model, In M. Egenhofer, C. Freksa, H. Miller (Eds.) Proceeding of GIScience 2004, Lecture Notes in Computer Science, 3234, Springer, Berlin, pp. 327-343.
Hornsby, K. and S. Hall (2004) Generating linear orders of text-based events, Proceedings of the Workshop on Computational Lexical Semantics, Human Language Technology Conference 2004 (HLT/NAACL‚Äô04), Boston, MA. pp 92-99.
Campos, J. and K. Hornsby (2003) Beyond the VCR metaphor: operations for a temporal VRGIS, ISPRS Joint Workshop on Spatial, Temporal and Multi-Dimensional Data Modeling and Analysis, October 2-3, 2003, Quebec City, Canada.
Hendricks, M., M. Egenhofer, K. Hornsby (2003) Structuring a wayfinder's dynamic space-time environment, in W. Kuhn, M. Worboys, S. Timpf (eds.) Proceedings of the International Conference on Spatial Information Theory, COSIT‚Äô03, Kartause Ittingen, Switzerland, Lecture Notes in Computer Science, Vol 2855, Springer, Berlin, pp. 75-92.
Campos, J., M. Egenhofer, K. Hornsby (2003) Animation model to support exploratory analysis of dynamic environments, Proceedings of the 2003 Summer Computer Simulation Conference (SCSC'03), July 20-24, 2003, Montreal, Canada, In press.
Roddick, J. K. Hornsby, and D. de Vries (2003) A unifying semantic distance model for determining the similarity of attribute values, in M. Oudshoorn (Ed.) Proceedings of the 26th Australasian Computer Science Conference, Adelaide, Australia, Vol 16, ACS, pp. 111-118.
Campos, J., K. Hornsby, M. Egenhofer (2002) A temporal model of virtual reality objects and their semantics, Proceedings of International Conference on Distributed Multimedia Systems (DMS'2002), San Francisco, CA, September 26-28, 2002 , Knowledge Systems Institute, Skokie, IL, pp. 581-588. pdf file
Ramalingam, C., and K. Hornsby (2001) Coarsening granularity over objects, Proceedings of the First COSIT Workshop on Spatial Vagueness, Uncertainty,, and Granularity, Morro Bay, CA.
Roddick,J., K. Hornsby, and M. Spiliopoulou (2001) An updated bibliography of temporal, spatial and spatio-temporal data mining research in J. Roddick and K. Hornsby (Eds.) Proceedings of the International Workshop on Temporal, Spatial, and Spatio-temporal Data Mining, TSDM2000, Lyon, France, Lecture Notes in Artificial Intelligence, 2007, Springer, 2001, pp. 147-163.
Hornsby, K.(2000) Shifting granularity over geospatial lifelines, In: Papers of the AAAI Workshop on Spatial and Temporal Granularity, Technical Report WS-00-08, Austin, TX, July 30, 2000, AAAI Press, Menlo Park, CA, pp. 33-36.
Hornsby, K. (2000) Deriving summaries through an identity-based approach, in: J. Etheredge and B. Manaris (Eds.), Proceedings of the 13th International Florida Artificial Intelligence Research Society Conference, FLAIRS-2000, Orlando, FL, May 22-25, 2000, AAAI Press, pp. 271-275.
Hornsby, K., M. Egenhofer, and P. Hayes (1999) Modeling cyclic change, in: P. Chen, D. Embley, J. Kouloumdjian, S. Liddle, and J. Roddick (Eds.), Advances in Conceptual Modeling, Proceedings of the ER'99 Workshops, Paris, France, Vol.1727, Lecture Notes in Computer Science, Springer-Verlag, Berlin, pp. 98-109.pdf file
Hornsby, K. and M. Egenhofer (1999) Shifts in detail through temporal zooming, In: A. Tjoa, A. Cammelli, and R. Wagner (Eds.), Proceedings of the Tenth International Workshop on Database and Expert Systems Applications, 1-3 September, 1999, Florence, Italy, IEEE Computer Society, Los Alamitos, CA, pp. 487-491.pdf file
Hornsby, K. and M. Egenhofer (1998) "Identity-based change operations for composite objects," In: T. Poiker and N. Chrisman (Eds.) Proceedings of 8th International Symposium on Spatial Data Handling, Vancouver, Canada, pp. 202-213. pdf file
Hornsby, K. and M. Egenhofer (1997) "Qualitative Representation of Change," In Spatial Information Theory - A Theoretical Basis for GIS, International Conference COSIT '97, Laurel Highlands, PA, Vol. 1329, Lecture Notes in Computer Science, S. Hirtle and A. Frank, Eds. Berlin: Springer-Verlag, 1997, pp. 15-33. pdf abstract
Florence, J., K. Hornsby, and M. Egenhofer (1996) "The GIS WallBoard: interactions with spatial information on large-scale displays," In Proceedings ofSeventh International Symposium on Spatial Data Handling, Delft, The Netherlands, pp. 449-463. abstract
K. Hornsby (2000) Creating summaries of spatio-temporal data, In: Abstracts, First International Conference on Geographic Information Science, GIScience 2000, Savannah, GA, October 28-31, 2000, p. 170-171.
K. Hornsby (1999) Spatio-temporal knowledge representation over shifting granularities (position paper) NCGIA's Project Varenius Specialist Meeting on Discovering Geographic Knowledge in Data Rich Environments,March 1999, Seattle, WA.(Workshop Report)
K. Hornsby and M. Egenhofer (1998) An algebra for fields (position paper) NCGIA's Project Varenius Specialist Meeting on The Ontology of Fields, June 1998, Bar Harbor, ME.
K. Hornsby (1997) An identity-based model for representing spatio-temporal change University Consortium for Geographic Information Science summer Assembly and Retreat, June 15 - 21, 1997, Bar Harbor, ME.
K. Hornsby (1996) Commonsense reasoning about spatial diffusion (position paper) NCGIA Specialist Meeting on Formal Models of Commonsense Geographic Worlds, October 1996, San Marcos, TX.
J. Roddick, L. Al-Jadir, L. Bertossi, M. Dumas, F. Estrella, H. Gregersen, K. Hornsby, J. Lufter, F. Mandreoli, T. M√§nnist√∂, E. Mayol, and L. Wedemeijer (2000) Evolution and change in data management: issues and directions. SIGMOD Record 29(1): 21-25.
D. Mark, M. Egenhofer, and K. Hornsby (1997) Formal Models of Commonsense Geographic Worlds, Report on the Specialist Meeting of Research Initiative 21, Technical Report, TR-97-2, National Center for Geographic Information and Analysis, Santa Barbara, CA.