Giudice, N. A., Klatzky, R. L., & Loomis, J. M. (in press). Evidence for amodal representations after bimodal learning: Integration of haptic-visual layouts into a common spatial image. Spatial Cognition & Computation. Participants learned circular layouts of 6 objects presented haptically or visually, then indicated the direction from a start target to an end target […]

Giudice, N.A., Bakdash, J.Z., Legge, G.E., & Roy, R. (in press). Spatial learning and navigation using a virtual verbal display. ACM Transactions on Applied Perception. Abstract: We report on three experiments that investigate the efficacy of a new type of interface, called a virtual verbal display (VVD) for non-visual learning and navigation of computer-based virtual […]

Egenhofer, M. and M. Dube. Topological Relations from Metric Refinements. Proceedings of the 17th ACM SIGSPATIAL – International Conference on Advances in Geographic Information Systems, Seattle, WA. D. Agrawal, W. Aref, C. Lu, M. Mokbel, P. Scheuermann, C. Shahabi and O. Wolfson (eds.), November, 2009. pp. 158-167. Abstract: Naive Geography’s premise “Topology matters, metric refines” […]

S. Nittel, A Survey of Geosensor Networks: Advances in Dynamic Environmental Monitoring, Sensors 2009, 9(7), 5664-5678; doi:10.3390/s90705664, published: 15 July 2009. In the recent decade, several technology trends have influenced the field of geosciences in significant ways. The first trend is the more readily available technology of ubiquitous wireless communication networks and progress in the […]

Dube, M. and M. Egenhofer. Establishing Similarity Across Multi-Granular Topological-Spatial Relations. QuaCon 2009 – First International Workshop on Quality of Context, Stuttgart, Germany. D. Fritsch and K. Rothermel (eds.), Lecture Notes in Computer Science, June 2009. pp. 98-108. Abstract. Within the Geospatial Semantic Web, selecting a different ontology for a spatial data set will enable […]

Kostas Nedas, Max J. Egenhofer, and Dominik Wilmsen, Metric Details of Topological Line-Line Relations International Journal of Geographical Information Science 21 (1): 21-48, 2007. Many real and artificial entities in geographic space, such as transportation networks and trajectories of movement, are typically modeled as lines in geographic information systems. In a similar fashion, people also perceive […]

Max J. Egenhofer and Maria Vasardani, Spatial Reasoning with a Hole, in: S. Winter, M. Duckham, L. Kulik, and B. Kuipers (eds.), Conference on Spatial Information Theory (COSIT ’07), Melbourne, Australia, Lecture Notes in Computer Science, Vol. 4736, Springer, pp. 303-320, September 2007. Cavities in spatial phenomena require geometric representations of regions with holes. Existing models for reasoning over […]

Markus Wuersch and Max J. Egenhofer, Perceptual Sketch Interpretation, in: A. Ruas and C.Gold (eds.), The 13th International Symposium on Spatial Data Handling (SDH 2008), Montpellier, France Springer, June 2008. An automated extraction of regions from sketches can be of great value for multi-modal user interfaces and for interpreting spatial data. This paper develops the Perceptual Sketch Interpretationalgorithm, which employs […]

R. Reis, M. Egenhofer, and J. Matos, Conceptual Neighborhoods of Topological Relations between Lines, in: A. Ruas and C.Gold (eds.), The 13th International Symposium on Spatial Data Handling (SDH 2008), Montpellier, France Springer, June 2008. Conceptual neighborhood graphs capture the similarity among qualitative relations. This paper derives the graphs for the thirty-three topological relations between two crisp, […]

David Caduff and Max J. Egenhofer, Geo-Mobile Query-by-Sketch, International Journal of Web Engineering and Technology, 3 (2): 157-175, 2007. The advent of wireless technology, such as cellphones, PDAs, tablet PCs, and sub-notebooks, allows tranferring portions of traditional desktop-based GIS technology to mobile environments. This paper introduces Geo-Mobile Query-by-Sketch, a sketch-based spatial querying system for mobile […]