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Karl Ahlqvist

  • Dir - Service-Learning Init., VP/Dean of UE
  • Professor, Geography
  • 154 N Oval Mall Room 1036B
    Columbus, OH 43210
  • 614-247-7997

Honors

  • 2009

    Communication Arts 2010 Interactive Annual. .

  • 2009

    AdobeMAX 2009 Award Finalist.

  • 2009

    Best in Category-Interactive and Judges Choice (August Heffner) award at the Creative Best 2009 competition. .

  • 2008

    "Curricular Engagement" and "Outreach & Partnerships" classification. .

  • 2008

    Outreach & Engagement Award. The Ohio State University.

  • 2007

    Best Paper in Image Analysis and Interpretation for 2005 Photogrammetric Engineering & Remote Sensing. .

  • 2004

    Young Scholar Award. .

Books

2000

  • Ahlqvist, O.. 2000. "Context Sensitive Transformation of Geographic Information." Edsbruk: Akademitryck.

1992

  • Ahlqvist, O. and Wiborn, P.. 1992. "Tranviks naturreservat. Naturinventering med förslag till skötselåtgärder." Norrtälje: Affärstryckeriet.

Chapters

2009

  • Ahlqvist, O.. 2009. "Overlay (in GIS)." In The International Encyclopedia of Human Geography, edited by Kitchin, R. and Thrift N., 48 - 55. Oxford: Elsevier.
  • Yarnal, B., Harrington, J., Comrie, A., Polsky, C., and Ahlqvist, O.. 2009. "Infrastructure for Observing Local Human-Environment Interactions." In Sustainable Communities on a Sustainable Planet., edited by Yarnal, B., Polsky, C., and O’Brien, 1 - 12. New York: Cambridge University Press.
  • Yarnal, B., Harrington, J., Comrie, A., Polsky, C., and Ahlqvist, O.. 2009. "Lessons Learned from the HERO Project." In Sustainable Communities on a Sustainable Planet., edited by Yarnal, B., Polsky, C., and O’Brien, 317 - 338. New York: Cambridge University Press.
  • Ahlqvist, O. and Yu, C.. 2009. "Representing and reasoning with conceptual understanding." In Sustainable Communities on a Sustainable Planet., edited by Yarnal, B., Polsky, C., and O’Brien, 59 - 82. New York: Cambridge University Press.
  • Ahlqvist, O.. 2009. "Reliability and Validity." In The International Encyclopedia of Human Geography, edited by Kitchin, R. and Thrift N., 320 - 323. Oxford: Elsevier.

2008

  • Ahlqvist, O.. 2008. "Semantic Networks." In Encyclopedia of Geographic Information Science, edited by Kemp, K.K., 384 - 385. Los Angeles: Sage Publications.

2005

  • Ahlqvist, O.. 2005. "Transformation of Geographic Information Using Crisp, Fuzzy And Rough Semantics.." In Re-Presenting GIS., edited by Fisher, P.F. and Unwin, D., 99 - 112. Chichester: Wiley.
  • Ahlqvist, O., Bibby, P., Duckham, M., Fisher, P., Harvey, F., and Schuurman, N.. 2005. "Not Just Objects: Reconstructing objects.." In Re-Presenting GIS., edited by Fisher, P.F. and Unwin, D., 17 - 25. Chichester: Wiley.

Journal Articles

2011

  • Ahlqvist, O.; Wästfelt, A.; Nielsen, M., 2011, "Formalized interpretation of compound land use objects –Mapping historical summer farms from a single satellite image." Journal of Land Use Science

2010

  • Ban, H. and Ahlqvist, O., 2010, User evaluation of a software interface for geovisualization and communication of uncertain urban ontologies. Journal of Information Technology in Construction 15, 122 - 131.
  • Ahlqvist, O. and Shortridge, A., 2010, "Spatial and semantic dimensions of landscape heterogeneity." Landscape Ecology no. 25, 573 - 590.
  • Ahlqvist, O.; Ban, H.; Cressie, N.; Zuniga-Shaw, N., 2010, "Statistical Counterpoint: Knowledge Discovery of Choreographic Information using Spatio-Temporal Analysis and Visualization." Applied Geography 4, no. 30, 548 - 560.
  • Ahlqvist,Ola; Ban,Hyowon; Cressie,Noel; Shaw,Norah,Zuniga, 2010, "Statistical counterpoint: Knowledge discovery of choreographic information using spatio-temporal analysis and visualization." APPLIED GEOGRAPHY 30, no. 4, 548 - 560.
  • Ahlqvist,Ola; Shortridge,Ashton, 2010, "Spatial and semantic dimensions of landscape heterogeneity." LANDSCAPE ECOLOGY 25, no. 4, 573 - 590.
  • Ahlqvist, O., 2010, "Virtual Globe Games for Geographic Learning." Journal of Systemics, Cybernetics and Informatics 8, no. 1, 61 - 63.
  • Ahlqvist, O., 2010, "A common framework for visually reconciling geographic data semantics in geospatial data mapping portals." Cartographica: The International Journal for Geographic Information and Geovisualization 45, no. 2, 140 - 151.

2009

  • Ban, H. & Ahlqvist, O., 2009, "Representing and negotiating uncertain geospatial concepts - Where are the exurban areas?." Computers, Environment and Urban Systems. 4, no. 33, 233 - 246.
  • Ban,Hyowon; Ahlqvist,Ola, 2009, "Representing and negotiating uncertain geospatial concepts - Where are the exurban areas?." COMPUTERS ENVIRONMENT AND URBAN SYSTEMS 33, no. 4, 233 - 246.

2008

  • Ahlqvist, O., 2008, "In search of classification that support the dynamics of science: The FAO Land Cover Classification System and proposed modifications." Environment and Planning B 35, no. 1, 169 - 186.
  • Ahlqvist,Ola, 2008, "Extending post-classification change detection using semantic similarity metrics to overcome class heterogeneity: A study of 1992 and 2001 US National Land Cover Database changes." REMOTE SENSING OF ENVIRONMENT 112, no. 3, 1226 - 1241.
  • Ahlqvist,Ola, 2008, "In search of classification that supports the dynamics of science: the FAO Land Cover Classification System and proposed modifications." ENVIRONMENT AND PLANNING B-PLANNING & DESIGN 35, no. 1, 169 - 186.
  • Ahlqvist, O., 2008, "Extending post-classification change detection using semantic similarity metrics to overcome class heterogeneity: A study of 1992 and 2001 U.S. National Land Cover Database changes." Remote Sensing of Environment 112, no. 3, 1226 - 1241.

2007

  • Ahlqvist, O. and Ban, H., 2007, "Categorical Measurement Semantics: A new second space for Geography." Geography Compass 1, no. 3, 536 - 555.

2006

  • Ahlqvist,Ola, 2006, "Fuzzy modeling with spatial information for geographic problems.." INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE 20, no. 6, 701 - 702.

2005

  • Ahlqvist,O, 2005, "Using uncertain conceptual spaces to translate between land cover categories." INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE 19, no. 7, 831 - 857.
  • Ahlqvist, O., 2005, "Using uncertain conceptual spaces to translate between land cover categories." International Journal of Geographical Information Science 19, no. 7, 831 - 857.
  • Ahlqvist, O and Gahegan, M., 2005, "Probing the relationship between classification error and class similarity." Photogrammetric Engineering and Remote Sensing 71, no. 12, 1365 - 1373.

2004

  • Ahlqvist, O., 2004, "A parameterized representation of uncertain conceptual spaces." Transactions in GIS 8, no. 4, 493 - 514.

2003

  • Ahlqvist,O; Keukelaar,J; Oukbir,K, 2003, "Rough and fuzzy geographical data integration." INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE 17, no. 3, 223 - 234.
  • Ahlqvist, O., Keukelaar, J., and Oukbir, K., 2003, "Rough and fuzzy geographical data integration." International journal of geographic information science 17, no. 3, 223 - 234.

2000

  • Ahlqvist, O., Keukelaar, J., and Oukbir, K., 2000, "Rough classification and accuracy assessment." International journal of geographic information science 14, no. 5, 474 - 496.
  • Ahlqvist, O, 2000, "Higher resolution put into perspective, "Great data, but how do we derive information?"." Geoinformatics 6, 34 - 37.
  • Ahlqvist,O; Keukelaar,J; Oukbir,K, 2000, "Rough classification and accuracy assessment." INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE 14, no. 5, 475 - 496.

Presentations

  • "Getting semantic with LISA." 2008, Presented at 5th International Conference on Geographic Information Science, Park City, US|USA
  • "Sympossium discussion: William Forsythe, his collaborators, and other authorities gather to discuss his concept of "choreographic objects."." 2009, Presented at William Forsythe Symposium:Choreographic Objects, Columbus,
  • "Community Mapping and Planning." 2010,
  • "Geographical analysis of CEDAR data." 2009, Pittsburgh, US|USA
  • "Creating a Virtual Tour of Columbus Using Google Earth." 2009, Presented at Digital Media in a Social World, Columbus,
  • "Ökade möjligheter till geografisk IT för miljön (Increased possibilities to use geographic IT for the environment)." 2001, Presented at Forskardagarna 2001 (Open House Research Days), SE|SWE
  • "Land classification and aspects of semantic uncertainty, representation, and visualization." 2008, Stockholm, SE|SWE
  • "Presentations." 2005, Columbus, US|USA
  • "Uncertain new spaces." 2006, Presented at Annual Meeting of the Association of American Geographers, Chicago, US|USA
  • "Semantic enrichment of geographic ontologies by means of uncertain conceptual spaces." 2007, Columbus, US|USA
  • "Semantic Aspects of Spatial and Temporal Dynamics." 2007, Stockholm, SE|SWE
  • "Land classification, semantics, and the dynamics of science." 2007, Stockholm, SE|SWE
  • GeoGames: Online maps, games, and learning. 2010, Presented at Digital Media in a Social World, Columbus, US|USA
  • "Assessing the context dependence of geographic information." 2000,
  • "Presentations." 2006, Presented at GEOG 889, Columbus, US|USA
  • "GIS and Uncertainty." 2006, Columbus, US|USA
  • "Keynote Speech.." 2010, Presented at 8th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Leicester,
  • "Analysis of differences in communication for co-located vs. remote web-enabled collaborators." 2005, Presented at Annual Meeting of the Association of American Geographers, Denver, US|USA
  • "GeoGames – Board Game Metaphors for GIS." 2010, Presented at GeoDesign Summit 2010, Redlands,
  • "GeoGame - Green Revolution Demonstration." 2010, Presented at Game Based Learning Brown bag, Columbus,
  • "GIS applications and quality issues for recreation planning." 1998, Presented at Stockholm City Planning Authority, Stockholm, SE|SWE
  • "Geografiskt sammanhang till stöd för generalisering i ett GIS (Geographic context to support generalization in GIS)." 1998,
  • "Kan framtida GIS göras geografiska? Ja, när geografens svada blir metadata.." 1998, Presented at Young GIS Enthusiast Meeting, Sundsvall, SE|SWE
  • "Games for Learning: GeoGames." 2009, Presented at Digital Union, Columbus,
  • "Cutting edge use of technology to create and share graphic data displays." 2010, Presented at Data Driven, Delaware,
  • "Miljöledning enligt ISO 14000 i GIS (ISO 14000 environmental management in a GIS)." 2001, Presented at GIT 2001 – Forum for Geographic IT, Stockholm, SE|SWE
  • "New Vistas on geographic Information." 2004, Presented at International GIS seminar, Jönköping, SE|SWE
  • "Geography and Geographic Information Science - examples from the HERO project and GeoVISTA center." 2004, Stockholm, SE|SWE
  • "Model generalization using rough classification." 1999, Stockholm, US|USA
  • "Context dependent transformation of geographic information." 2000, Santa Barbara, US|USA

Papers in Proceedings

2010

  • Ahlqvist, O. "A new look at semantic uncertainty (Invited keynote presentation)." in Accuracy 2010 - Proceedings of the Ninth International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences. Leicester, (1 2010). 1 - 2.

2009

  • Ahlqvist, O. "Using dot density maps for visualization of vague category counts." in International Cartographic Conference 2009 Proceedings. Santiago, (1 2009).
  • Ban, H. and Ahlqvist, O. "User evaluation for a software interface for communication in urban ontologies." in Urban Ontologies for an improved communication in urban development projects. Liege, (1 2009). 1 - 11.

2008

  • Ban, H., Ahlqvist, O. "Web-based Interactive Visualization of Uncertain Concepts in Urban Ontologies.." in Conceptual Models for Urban Practitioners. Torino, (1 2008). 48 - 59.

2007

  • Ban,Hyowon; Ahlqvist,Ola "Visualizing the uncertainty of urban ontology terms." JOURNAL: "ONTOLOGIES FOR URBAN DEVELOPMENT." in 1st Workshop on Ontologies for Urban Development - Interfacing Urban Information Systems. BERLIN, (1 2007). 85 - 94.
  • Ban, H., & Ahlqvist, O. "Visualizing the uncertainty of urban ontology terms.." in Ontologies for urban development.. Berlin, (1 2007). 85 - 94.

2006

  • Ahlqvist, O. and Shortridge, A. "Characterizing Land Cover Structure with Semantic Variograms." in Progress in Spatial Data Handling - 12th International Symposium on Spatial Data Handling. (1 2006). 401 - 415.

2005

  • Ahlqvist, O. "Using semantic similarity metrics to uncover category and land cover change.." in Geospatial Semantics. (1 2005). 107 - 119.
  • Ahlqvist,O "Using semantic similarity metrics to uncover category and land cover change." JOURNAL: "GEOSPATIAL SEMANTICS, PROCEEDINGS." in 1st International Conference on GeoSpatial Semantics (GeoS 2005). BERLIN, (1 2005). 107 - 119.
  • Comber, L., Ahlqvist, O, Fisher, P., Harvey, F., Gahegan, M., and Wadsworth, R. "Can metadata be ever be interesting?." in GISRUK 2005, 13th annual conference. (4 2005).

2003

2001

  • Ahlqvist, O. "A semantic perspective on multi-resolution data." in SCANGIS'2001, 8th Scandinavian Research Conference on Geographical Information Science. Ås, (6 2001).
  • Ahlqvist, O., Keukelaar, J., and Oukbir, K. "Context Sensitive Model Generalization." in GISRUK 2001. (4 2001). 185 - 187.

1998

  • Ahlqvist, O., Keukelaar, J. and Oukbir, K. "Using Rough classification to represent Uncertainty in Spatial Data.." in SIRC’98, 10th Annual Colloquium of the spatial Information Research Centre. (11 1998).

1997

  • Ahlqvist, O and Arnberg, W. "A theory of geographic context – The fifth dimension in geographical information." in ScanGIS’97. Stockholm, (1 1997).