K. Ola Ahlqvist, PhD
- Assistant Professor
- Department of Geography
- 1049B Derby Hall
- 154 N Oval Mall
- Columbus, OH 43210
- Ph. +1 614 247 7997
Complete list of publications (send an email for reprints)
Books and monographs.
2000 Ahlqvist, O. Context Sensitive Transformation of Geographic Information, Dissertation No.16, The Department of Physical Geography Stockholm University Dissertation Series, 141p.
1992 Ahlqvist, O., and Wiborn, P., Tranviks naturreservat. Naturinventering med förslag till skötselåtgärder (The Tranvik Nature preserve. Nature inventory with proposed management practices. B.S. Graduate work), Naturvård i Norrtälje kommun, Affärstryckeriet, Norrtälje, 59p.
Chapters in edited books.
2005 Ahlqvist, O. Transformation of Geographic Information Using Crisp, Fuzzy And Rough Semantics. Re-Presenting GIS. Fisher, P.F. and Unwin, D. Eds. Wiley, pp. 99-112.
2005 Ahlqvist, O., Bibby, P., Duckham, M., Fisher, P., Harvey, F., and Schuurman, N. Not Just Objects: Reconstructing objects. Re-Presenting GIS. Fisher, P.F. and Unwin, D. Eds. Wiley, pp. 17-25.
Bulletins and technical reports.
2002 Oukbir, K., Keukelaar, J., Ahlqvist, O Rough Point-Set Topological Relations, Transactions of the Royal Institute of Technology, TRITA-NA-0111 ,Nada , KTH, Stockholm, 16p.
Peer reviewed journal articles.
2008 Ahlqvist, O., In search for classification that support the dynamics of science – The FAO Land Cover Classification System and proposed modifications, Environment and Planning B, 35(1): 169-186.
2008 Ahlqvist, O., Extending post classification change detection using semantic similarity metrics to overcome class heterogeneity: a study of 1992 and 2001 National land Cover Database changes, Remote Sensing of Environment, 112(3): 1226-1241.
2007 Ahlqvist, O. and Ban, H., Semantic spaces - a new second space for geographic analysis, Geography Compass, 1(3): 536-555
2005 Ahlqvist, O., Using uncertain conceptual spaces to translate between land cover categories, International Journal of Geographical Information Science, 19(7): 831-857.
2005 Ahlqvist, O and Gahegan, M., Probing the relationship between classification error and class similarity, Photogrammetric Engineering and Remote Sensing, Vol.71, No.12, pp.1365-1373.
2004 Ahlqvist, O., A parameterized representation of uncertain conceptual spaces, Transactions in GIS, 8(4), 493-514.
2003 Ahlqvist, O., Keukelaar, J., and Oukbir, K., Rough and fuzzy geographical data integration, International journal of geographic information science, 17(3): 223-234.
2000 Ahlqvist, O., Keukelaar, J., and Oukbir, K., Rough classification and accuracy assessment, International journal of geographic information science, 14(5): 475-496.
Editor reviewed journal articles.
2000 Ahlqvist, O., Higher resolution put into perspective, "Great data, but how do we derive information?", Geoinformatics, Vol.6
Reviews and abstracts.
2007 Ahlqvist, O., The geo-attribute space: a general space-time-property representation, extended abstract presented by Ningchuan Xiao at GeoComputation 2007, the 9th International Conference on Geocomputation, Maynooth, Ireland, September 3-5. (
2007 Xiao, N., Ahlqvist, O., Kwan, M.-P., Public Participation GIS for the General Public?, extended abstract presented at GeoComputation 2007, the 9th International Conference on Geocomputation, Maynooth, Ireland, September 3-5.
2006 Ahlqvist, O., Book review, Fuzzy Modeling with Spatial Information for Geographic Problems, International Journal of Geographical Information Science, 20 (6): 701-702
2004 Ahlqvist, O., Macgill, J., and Guo, D., Exploration of semantic uncertainty in parameterized land use/land cover classifications, extended abstract presented at GIScience 2004, The Third International Conference on Geographic Information Science, Adelphi, Maryland, USA, October 20-23, pp.5-8.
2002 Ahlqvist, O. Estimating semantic uncertainty in multi-resolution land cover classifications, abstract presented at GIScience 2002, Second International Conference on Geographic Information Science, Boulder, Colorado, USA, September 25-28, pp.6-8.
2000 Ahlqvist, O., Keukelaar, J. and Oukbir, K. Fuzzy and Rough Geographic Data Integration, paper presented at GIScience 2000, First International Conference on Geographic Information Science, Savannah, Georgia, USA, October 28-31, 2000.
Papers in proceedings.
2007 Ban, H., & Ahlqvist, O., Visualizing the uncertainty of urban ontology terms. In J. Lee, J. Teller & C. Roussey (Eds.), Ontologies for urban development. Berlin Heidelberg: Springer Berlin / Heidelberg, pp. 85-94.
2006 Ahlqvist, O. and Shortridge, A., Characterizing Land Cover Structure with Semantic Variograms, Progress in Spatial Data Handling -12th International Symposium on Spatial Data Handling, Riedl, A., Kainz, W., and Elmes, G.A. (Eds.), Springer-Verlag, pp.401-415.
2005 Ahlqvist, O. Using semantic similarity metrics to uncover category and land cover change. Geospatial Semantics, Lecture Notes In Computer Science, 3799: 107-119.
2005 Comber, L., Ahlqvist, O, Fisher, P., Harvey, F., Gahegan, M., and Wadsworth, R., Can metadata be ever be interesting? Paper presented at 13th annual conference GISRUK, 6-8 April, 2005, University of Glasgow, U.K.
2003 Pike, W., Ahlqvist, O., Gahegan, M., and Oswal, S., Supporting Collaborative Science through a Knowledge and Data Management Portal, in: Ashish, N. and Goble, C. (Eds.), Proceedings of the Workshop on Semantic Web Technologies for Searching and Retrieving Scientific Data. Co-located with the 2nd International Semantic Web Conference ISWC-03, Sanibel Island, Florida, USA, 20 October. CEUR Workshop Proceedings, ISSN 1613-0073, 6p., URL http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-83/
2001 Ahlqvist, O. A semantic perspective on multi-resolution data, The 8th Scandinavian Research Conference on Geographical Information Science, Workshop on multi-resolution, SCANGIS'2001, 25th-27th June, 2001, Ås, Norway.
2001 Ahlqvist, O., Keukelaar, J., and Oukbir, K. Context Sensitive Model Generalization, in: Kidner, D.B., and Higgs, G., GIS Research in the UK, Proceedings of the GIS research UK 9th annual conference GISRUK 2001, 18-20 April 2001, University of Glamorgan, Wales, pp. 185-187.
1998 Ahlqvist, O., Keukelaar, J. and Oukbir, K. Using Rough classification to represent Uncertainty in Spatial Data. SIRC’98, The 10th Annual Colloquium of the spatial Information Research Centre, Univ. Of Otago, New Zealand, 16-19 November 1998.
1997 Ahlqvist, O and Arnberg, W. A theory of geographic context – The fifth dimension in geographical information, in: Hauska, H. (Ed), Proceedings, ScanGIS’97, Stockholm Sweden.
Unpublished Research Papers and Posters Presented at Professional Meetings
2007 Ahlqvist, O., Categorical measurement semantics – A New Second Space for Geography, presentation at 2007 Annual Meeting of the Association of American Geographers, April 17-21, San Francisco, California.
2006 Ahlqvist, O. and Kwan, M.-P. Visual analytics and geo-attribute spaces, position paper presented at the UCGIS workshop on Computation and Visualization for the Understanding of Dynamics in Geographic Domains, 16-18 October 2006, Maritime Institute of Technology & Graduate Studies, Washington, D.C.
2006 Ahlqvist, O. Numerically based visualizations of nominal geographic data, presentation at 2006 Annual Meeting of the Association of American Geographers, March 7-11, Chicago, Illinois.
2005 Ahlqvist, O. Analysis of differences in communication for co-located vs. remote web-enabled collaborators, presentation at 2005 Annual Meeting of the Association of American Geographers, April 9, 2005, Denver, Colorado.
