Research papers (Drafts of many of these can be downloaded using the links below).
Wang, J., Wood, Z. and Worboys, M. Conflict in pedestrian networks. Proc. Conference of the Association of Geographic Information Laboratories in Europe, Helsinki, Finland, pp. 261-278, Springer Verlag LNCS, ISBN 978-3-319-33782-1, 2016.
Wang, J., Duckham, M. and Worboys, M. A framework for models of movement in geographic space. International Journal of Geographic Information Science, vol. 30, no. 5, pp. 970-992, 2015.
Yang, L. and Worboys, M. Generation of navigation graphs for indoor space. International Journal of Geographic Information Science, 29(10): 1737-1756, 2015.
Using maptrees to characterize topological change. Spatial Information Theory, (Proceedings of the International Conference on Spatial Information Theory, England, 2013). In Tenbrink et al., editors, Lecture Notes in Computer Science 8116, pp. 74-90, Springer, Heidelberg, 2013.
Worboys, M. Using bigraphs to model topological graphs embedded in orientable surfaces, Journal of Theoretical Computer Sciencehttp://dx.doi.org/10.1016/j.tcs.2013.02.018, 2013.
Worboys, M.F. The maptree: A fine-grained representation of space. International Conference on Geographic Information Science (GIScience 2012), Ohio, USA, In N. Xiao et al., editors, Lecture Notes in Computer Science 7478, pp. 298-310, Springer, Heidelberg, 2012.
Walton, L. and Worboys, M.F. A Qualitative Bigraph Model for Indoor Space. International Conference on Geographic Information Science (GIScience 2012), Ohio, USA, 2012. In N. Xiao et al., editors, Lecture Notes in Computer Science 7478, pp. 226-240, Springer, Heidelberg, 2012.
Worboys, M.F., Modeling indoor space (keynote). Third ACM SIGSPATIAL International Workshop on Indoor Spatial Awareness (ISA 2011), November, Chicago, IL. 2011.
Yang, L. and Worboys, M.F. A navigation ontology for outdoor-indoor space. Third ACM SIGSPATIAL International Workshop on Indoor Spatial Awareness (ISA 2011), November, Chicago, IL. 2011.
Farah, C., Schwaner, F., Abedi, A. and Worboys, M. A distributed homology algorithm to detect topological events via wireless sensor networks. IET Journal of Wireless Sensor Systems (accepted) 2011.
Stell, J. and Worboys, M. Relations between adjacency trees, Journal of Theoretical Computer Science 412, pp. 4452-4468 DOI: 10.1016/j.tcs.2011.04.029, 2011.
Galton, A. and Worboys, M.F. An ontology of information for emergency management. Proceedings of the 8th International ISCRAM Conference, Lisbon, Portugal, 2011.
Jiang, J., Nittel, S. and Worboys, M. Qualitative change detection using sensor networks based on connectivity information, GeoInformatica 15(2): 305-328, 2011.
Giudice, N.A., Walton, L.A., & Worboys, M. The informatics of indoor and outdoor space: A research agenda. Second ACM SIGSPATIAL International Workshop on Indoor Spatial Awareness (ISA 2010), November, San Jose, CA. 2010.
Duckham, M., Stell, J., Vasardani , M., and Worboys, M. Qualitative change to 3-valued regions. International Conference on Geographic Information Science, Zurich, Switzerland, In S. Fabrikant et al., editors, Lecture Notes in Computer Science 6296, pp. 249-263, Springer, Berlin, 2010.
Walton, L. and Worboys, M. An algebraic approach to image schemas for geographic space. In Spatial Information Theory, pages 357–370. Springer, LNCS 2009.
Jiang, J. and Worboys, M. Preliminaries for topological change detection in sensor networks. 3rd Int. Conf. on Geosensor Networks, Oxford, England, 2009.
Jiang, J. and Worboys, M. Detecting Basic Topological Changes in Sensor Networks by Local Aggregation. 16th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM GIS 2008), Irvine, CA, 2008.
Stell, J. and Worboys, M.F. A Theory of Change for Attributed Spatial Entities. International Conference on Geographic Information Science (GIScience 2008), Utah, USA, 2008.
Farah, C., Zhong, C., Worboys, M., and Nittel, S. Detecting Topological Change Using a Wireless Sensor Network. International Conference on Geographic Information Science (GIScience 2008), Utah, USA, 2008.
Jiang, J. and Worboys, M. Event-based topology for dynamic planar areal objects. International Journal of Geographic Information Science, 23(1), 33-60, 2009.
Zhong, C. and Worboys, M. Continuous contour mapping in sensor networks, Proc. Fifth IEEE Consumer Communications & Networking Conference (CCNC 2008), Las Vegas, Nevada, 2008.
Zhong, C. and Worboys, M. Generating contours in a sensor network using isovector aggregation. In Proc. Of the 5th IEEE Upstate NY Workshop on Communications, Sensors and Networking, 2007.
Klippel, A., Worboys, M.F., and Duckham, M. Identifying factors of geographic event conceptualization, International Journal of Geographic Information Science, 22, 183-204, 2008.
Duckham, M., Kulik, L., Worboys, M., and Galton, A., Efficient generation of simple polygons for characterizing the shape of a set of points in the plane, Pattern Recognition, 41, 3224-3236, 2008.
Brunyé, T. T., Taylor, H. A., & Worboys, M. Levels of detail in descriptions and depictions of geographic space. Spatial Cognition and Computation, 7(3), 227-266, 2007.
Klippel, A., Worboys, M.F., and Duckham, M. Conceptual Neighbourhood Blindness – On the Cognitive Adequacy of Gradual Topological Changes, Conference on Spatial Cognition, Workshop on Talking about and Perceiving Moving Objects: Exploring the Bridge between Natural Language, Perception and Formal Ontologies of Space.Bremen, Germany, 2006.
Worboys, M.F. and Duckham, M. Monitoring qualitative spatial change for geosensor networks. International Journal of Geographic Information Science, 20(10), 1087-1108, 2006.
Worboys, M.F. and Duckham, M. Formalizing mobility in dynamic location-aware sensor networks, (short paper). International Workshop on Mobile Location-Aware Sensor Networks, Nara, Japan, IEEE Publications, 2006.
Klippel, A., Worboys, M.F., and Duckham, M. Geographic event conceptualization, Cognitive Processing, 7 (5), pp. 52–54, 2006.
Duckham, M., Lingham, J., Mason, K. and Worboys, M.F., Qualitative reasoning about consistency in geographic information, Information Sciences, 176 (6), 601-627, 2006.
Galton, A. and Worboys, M.F. Processes and events in dynamic geospatial networks. In M.A. Rodrıguez, I.F. Cruz, M.J. Egenhofer, and S. Levashkin, editors, Proceedings of First International Conference on Geospatial Semantics, volume 3799 of Lecture Notes in Computer Science, pages 45–59. Springer, 2005.
Duckham, M., Nittel, S. and Worboys, M. Monitoring Dynamic Spatial Fields Using Responsive Geosensor Networks. In Shahabi, C. and Boucelma,O. (eds) ACM GIS 2005, ACM Press, pp. 51-60, 2005.
Worboys, M.F. Event-oriented approaches to geographic phenomena. International Journal of Geographic Information Science, 19(1):1-28, 2005.
Duckham, M. and Worboys, M., An algebraic approach to automated information fusion. International Journal of Geographic Information Systems, 19(5): 537-558, 2005.
Worboys, M., Duckham, M. and Kulik, L. Commonsense notions of proximity and direction in environmental space. Spatial Cognition and Computation, 4 (4), 285-312, 2004.
Worboys, M.F. and Hornsby, K., From objects to events: GEM, the geospatial event model, Third International Conference on GIScience 2004, M. Egenhofer, C. Freksa, H. Miller (eds.), Lecture Notes in Computer Science 3234, Berlin: SpringerVerlag, pp. 327-344, 2004.
Duckham, M., Kulik, L. and Worboys, M., Imprecise navigation, GeoInformatica 7:2, 79-94, 2003.
Worboys, M.F. and Duckham, M. Integrating spatio-thematic information. Geographic Information Science-Second International Conference GIScience 2002, M. Egenhofer and D. Mark (eds.), Lecture Notes in Computer Science 2478, Berlin: SpringerVerlag, pp. 346-361, 2002.
Griffiths, T., Fernandes, A. Paton,, N., Jeong, S.-H., Djafri, N., Mason, K.T., Huang, B., and Worboys, M., TRIPOD: A Spatio-Historical Object Database System, in Ladner, R., Shaw, K. and Abdelguerfi, L. (eds.) Mining Spatio-Temporal Information Systems, Amsterdam: Kluwer Academic Publishers, pp. 127-146, ISBN 1-4020-7170-1, 2002.
Duckham, M., Mason, K., Stell, J. and Worboys, M.F., A formal approach to imperfection in geographic information, Computers, Environment and Urban Systems, 25: 89-103, 2001.
Worboys, M.F. and Clementini, E., Integration of imperfect spatial information, Journal of Visual Languages and Computing, 12, 61-80, 2001.
Worboys, M. F., Nearness relations in environmental space, International Journal of Geographical Information Systems, 15(7): 633-651, 2001.
Duckham, M. and Worboys, M.F., Computational structure in three-valued nearness relations, Proceedings of the International Conference on Spatial Information Theory, Morro Bay, CA, USA, Montello, D.R. (ed.), Berlin: Springer Verlag, Lecture Notes in Computer Science 2205, pp. 76-91, 2001.
Griffiths, T., Fernandes, A., Paton, N., Mason, K., Huang, B., Worboys, M. Tripod: A comprehensive model for spatial and aspatial historical objects. Proceedings of the 20th International Conference on Conceptual Modelling (ER 2001) (Hideko S. Kunii & Sushil Jajodia eds.), Yokohama, Japan, 84-102, 2001.
Huang, B. and Worboys, M.F., Dynamic modelling and visualization on the Internet, Transactions in GIS 5(2): 131-140, 2000.
Stell, J.G. and Worboys, M.F., Generalizing graphs using amalgamation and selection, Proceedings of the 6th International Symposium, SSD'99, Hong Kong, China, Güting, R., Papadias, D. and Lochovsky, F. (eds.), Springer Verlag, pp. 19-32, 1999.
Raubal, M. and Worboys, M.F., A formal model of the process of wayfinding in built environments, in Proceedings of the International Conference on Spatial Information Theory, Stade, Germany, Freksa, C. and Mark, D.M. (eds.), Springer Verlag, Lecture Notes in Computer Science 1661, pp. 381-401, 1999.
Worboys, M.F., Mason, K. and Lingham, J., Computational techniques for non-Euclidean planar spatial data applied to migrant flows, in Innovations in Geographical Information Systems: 5, Carver, C. (ed), Taylor and Francis, ISBN 074840910X, pp. 35-45, 1998.
Stell, J.G. and Worboys, M.F., Stratified map spaces, Proceedings of the 8th International Symposium on Spatial Data Handling, British Columbia, Poiker, T. and Chrisman, N. (eds.), Taylor and Francis, pp. 180-189, 1998.
Worboys, M.F., Computation with imprecise geospatial data, Computers, Environment and Urban Systems 22(2): 85-106, 1998.
Worboys, M.F., Imprecision in finite resolution spatial data, Geoinformatica 2(3): 257-280, 1998.
Stell, J.G. and Worboys, M.F., The algebraic structure of sets of regions, in Proceedings of the Conference on Spatial Information Theory, Pittsburgh, Hirtle, S. and Frank, A.U. (eds.), Springer Verlag, Lecture Notes in Computer Science 1329, pp. 163-174, 1997.
Worboys, M.F., Metrics and Topologies for Geographic Space, in Advances in Geographic Information Systems Research II: Proceedings of the International Symposium on Spatial Data Handling, Delft, Kraak, M.J. and Molenaar, M. (eds.), Taylor & Francis, ISBN 0748405917, pp. 365-376, 1996.
Jayawardena, D. P. W. and Worboys, M. F., The role of triangulation in spatial data handling, in Innovations in Geographical Information Systems: 2, Fisher, P. (ed), Taylor and Francis, ISBN 0-7484-0268-3, pp. 7-18, 1995.
Yearsley, C., and Worboys, M.F., A deductive model of complex planar spatial objects, in Innovations in Geographical Information Systems: 2, Fisher, P. (ed), Taylor and Francis, ISBN 0-7484-0268-3, pp. 43-52, 1995.
Stell, J. and Worboys, M.F., Towards a representation for spatial objects in diverse geometries, Proceedings of the Second ACM Workshop on Advances in Geographic Information Systems, Gaithersburg, Maryland, USA, ACM Press, New York, ISBN 0897917502, pp. 38-43, 1995.
Story, P. A. and Worboys, M. F., A design support environment for spatio-temporal database applications, in Proceedings of the Conference on Spatial Information Theory, Vienna, Frank, A.U., Kuhn, W., Mark, D.M. (eds.), Springer Verlag, ISBN 3540603921, pp. 413-430, 1995.
Yearsley, C., Worboys, M.F., Story, P., Jayawardena, D.P. and Bofakos, P., Computational Support for Spatial Information Handling: Models and Algorithms, in Innovations in Geographical Information Systems, Worboys, M.F. (ed.), Taylor and Francis, London, UK, ISBN 0748401407, 1994.
Worboys, M. F., A Unified Model of Spatial and Temporal Information, Computer Journal, 37(1), pp. 26-34, 1994.
Worboys, M. F., Object-oriented approaches to geo-referenced information, International Journal of Geographical Information Systems, 8(4), pp. 385-399, 1994.
Worboys, M.F., Unifying the spatial and temporal components of geographical information, in Advances in Geographic Information Systems: Proceedings of the International Symposium on Spatial Data Handling, Edinburgh, Healey, R. and Waugh, T. (eds.), Taylor and Francis, ISBN 074-840-3159, pp. 505-517, 1994.
Worboys, M. F. and Bofakos, P. , A Canonical Model for a Class of Areal Spatial Data, in Advances in Spatial Databases, Proceedings of the 3rd International Symposium, SSD93, Abel, D. and Ooi, B.C. (eds), Springer-Verlag, Berlin, ISBN 3540568697, pp. 36-52, 1993.
Young, D.W., Bofakos, P., Worboys, M. F. and Lowe, P., Medical Audit using Automatic Extraction from GP's Letters, Proceedings of Current Perspectives in Healthcare Computing, BJHC Ltd., Weybridge, Surrey, ISBN 0948198141, pp. 582-589, 1993.
Worboys, M. F., Mason, K.T. and Dawson, B.R.P., The Object-Based Paradigm for a Geographical Database System: Modelling, Design and Implementation Issues, in Geographical Information Handling, Mather, P. (ed), Wiley, Chichester, UK, ISBN 0471940607, pp. 91-102, 1993.
Worboys, M.F., Database Specification using Transaction Sets, in Specifications of Database Systems, Harper, D. and Norrie, M. (eds), Springer-Verlag, Workshops in Computing Series, ISBN 3-540-19732-X, pp.300-311, Jan. 1992.
Worboys, M. F., A Generic Model for Planar Geographic Objects, International Journal of Geographical Information Systems, 6(5), pp.353-372, 1992.
Worboys, M. F., A Model for Spatio-Temporal Information, Proceedings of the 5th International Symposium on Spatial Data Handling, Charleston, South Carolina, USA, pp. 602-611, 1992.
Worboys, M. F., Object-Oriented Models of Spatiotemporal Information, Proceedings of GIS/LIS '92 Annual Conference, San Jose, California, USA, American Society of Photogrammetry and Remote Sensing, Bethseda, MA, USA, ISBN 0944426905, pp. 825-834, 1992.
Worboys, M.F. and Deen, S.M., Semantic Heterogeneity in Distributed Geographic Databases, ACM SIGMOD Record, 20(4), pp. 30-34, Dec. 1991.
Worboys, M. F., Hearnshaw, H. M., and Maguire, D. J., Object-oriented data modelling for spatial databases, International Journal of Geographical Information Systems, 4(4), pp. 369-383, 1990.
Worboys, M. F., Hearnshaw, H. M., and Maguire, D. J., Object-oriented data and query modelling for geographical information systems, Proceedings of the 4th International Symposium on Spatial Data Handling, Zurich, pp. 679-689, 1990.
Arrell, D.G., Manrai, S., Worboys, M.F., An algorithm for obtaining simplified defining relations for a subgroup, in Groups - St. Andrews, 1981, London Mathematical Society Lecture Notes, No.71, Cambridge Univ. Press, 1982.
Worboys, M.F., Generators for the sporadic group Co3 as a (2,3,7)-group, Proc. Edinburgh Mathematical Society 25(2), pp. 65-68, 1982.
