2021
Mapping research topics at multiple levels of detail.
Patterns, 2021
Spatial concepts in the conversation with a computer.
Commun. ACM, 2021
Search Facets and Ranking in Geospatial Dataset Search.
Proceedings of the 11th International Conference on Geographic Information Science, 2021
Reimagining GIS Instruction through Concept-Based Learning.
Proceedings of the 24th AGILE Conference on Geographic Information Science, 2021
2019
Places in Information Science.
J. Assoc. Inf. Sci. Technol., 2019
Using provenance to disambiguate locational references in social network posts.
Int. J. Geogr. Inf. Sci., 2019
Talk of the Town: Discovering Open Public Data via Voice Assistants (Short Paper).
Proceedings of the 14th International Conference on Spatial Information Theory, 2019
Enabling the Discovery of Thematically Related Research Objects with Systematic Spatializations.
Proceedings of the 14th International Conference on Spatial Information Theory, 2019
Towards a Usability Scale for Participatory GIS.
Proceedings of the Geospatial Technologies for Local and Regional Development, 2019
2018
Computing with cognitive spatial frames of reference in GIS.
Trans. GIS, 2018
Special section in honor of Andrew U. Frank.
Int. J. Geogr. Inf. Sci., 2018
Advancing interoperability of geospatial data provenance on the web: Gap analysis and strategies.
Comput. Geosci., 2018
Improving Discovery of Open Civic Data.
Proceedings of the 10th International Conference on Geographic Information Science, 2018
2017
The Concept of Location in Astronomic Spaces.
Proceedings of Workshops and Posters at the 13th International Conference on Spatial Information Theory, 2017
Categorizing Cognitive Scales of Spatial Information.
Proceedings of Workshops and Posters at the 13th International Conference on Spatial Information Theory, 2017
An interoperable approach for Sensor Web provenance.
Proceedings of the 2017 6th International Conference on Agro-Geoinformatics, 2017
2016
Spatial discovery and the research library.
Trans. GIS, 2016
Special issue introduction: Spatial approaches to information search.
Spatial Cogn. Comput., 2016
Exploring the Notion of Spatial Lenses.
Proceedings of the Geographic Information Science - 9th International Conference, 2016
Extracting spatial information from social media in support of agricultural management decisions.
Proceedings of the 10th Workshop on Geographic Information Retrieval, 2016
Question-Based Spatial Computing - A Case Study.
Proceedings of the Geospatial Data in a Changing World, 2016
2015
A formal model to infer geographic events from sensor observations.
Int. J. Geogr. Inf. Sci., 2015
Thinking about Spatial Computing.
Proceedings of the Workshop on Teaching Spatial Thinking from Interdisciplinary Perspectives, 2015
You Can't Smoke Here: Towards Support for Space Usage Rules in Location-aware Technologies.
Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems, 2015
Designing a Language for Spatial Computing.
Proceedings of the AGILE 2015, 2015
2014
An event abstraction layer for the integration of geosensor data.
Int. J. Geogr. Inf. Sci., 2014
Meaningful spatial prediction and aggregation.
Environ. Model. Softw., 2014
Spatial reference in the Semantic Web and in Robotics (Dagstuhl Seminar 14142).
Dagstuhl Reports, 2014
Linked Data - A Paradigm Shift for Geographic Information Science.
Proceedings of the Geographic Information Science - 8th International Conference, 2014
Five General Properties of Resolution.
Proceedings of the Workshop on Geographic Information Observatories 2014 co-located with the 8th International Conference on Geographic Information Science (GIScience 2014), 2014
Making the Web of Data Available Via Web Feature Services.
Proceedings of the Connecting a Digital Europe Through Location and Place, 2014
Informing online and mobile map design with the collective wisdom of cartographers.
Proceedings of the Designing Interactive Systems Conference 2014, DIS '14, Vancouver, BC, 2014
2013
Interactive maps: What we know and what we need to know.
J. Spatial Inf. Sci., 2013
Community activities: Synthesizing population, health, and place.
J. Spatial Inf. Sci., 2013
Abstracting Transport to an Ontology Design Pattern for the Geosciences.
Proceedings of the 4th Workshop on Ontology and Semantic Web Patterns co-located with 12th International Semantic Web Conference (ISWC 2013), 2013
Envisioning a future for a spatial-health CyberGIS marketplace.
Proceedings of the Second ACM SIGSPATIAL International Workshop on Use of GIS in Public Health, 2013
Spatiotemporal Braitenberg vehicles.
Proceedings of the 21st SIGSPATIAL International Conference on Advances in Geographic Information Systems, 2013
Linked Data and Time - Modeling Researcher Life Lines by Events.
Proceedings of the Spatial Information Theory - 11th International Conference, 2013
A Geo-ontology Design Pattern for Semantic Trajectories.
Proceedings of the Spatial Information Theory - 11th International Conference, 2013
Trust and Reputation Models for Quality Assessment of Human Sensor Observations.
Proceedings of the Spatial Information Theory - 11th International Conference, 2013
On the Formulation of Conceptual Spaces for Land Cover Classification Systems.
Proceedings of the Geographic Information Science at the Heart of Europe, 2013
2012
The influence of landscape variation on landform categorization.
J. Spatial Inf. Sci., 2012
Core concepts of spatial information for transdisciplinary research.
Int. J. Geogr. Inf. Sci., 2012
Semantic Observation Integration.
Future Internet, 2012
A Conceptual Analysis of Resolution.
Proceedings of the XIII Brazilian Symposium on Geoinformatics, 2012
2011
The semantics of similarity in geographic information retrieval.
J. Spatial Inf. Sci., 2011
Semantic Referencing of Geosensor Data and Volunteered Geographic Information.
Proceedings of the Geospatial Semantics and the Semantic Web, 2011
Core Concepts of Spatial Information: A First Selection.
Proceedings of the XII Brazilian Symposium on Geoinformatics, 2011
A Model of Spatial Reference Frames in Language.
Proceedings of the Spatial Information Theory - 10th International Conference, 2011
Finite Relativist Geometry Grounded in Perceptual Operations.
Proceedings of the Spatial Information Theory - 10th International Conference, 2011
2010
Modeling vs encoding for the Semantic Web.
Semantic Web, 2010
Affordance-based categorization of road network data using a grounded theory of channel networks.
Int. J. Geogr. Inf. Sci., 2010
Affordances as Qualities.
Proceedings of the Formal Ontology in Information Systems, 2010
A Process-Centric Ontological Approach for Integrating Geo-Sensor Data.
Proceedings of the Formal Ontology in Information Systems, 2010
2009
Guest Editorial: Does Place Have a Place in Geographic Information Science?
Spatial Cogn. Comput., 2009
A Hybrid Semantic Similarity Measure for Spatial Information Retrieval.
Spatial Cogn. Comput., 2009
Semantics, ontologies and eScience for the geosciences.
Comput. Geosci., 2009
Semantic Challenges for Sensor Plug and Play.
Proceedings of the Web and Wireless Geographical Information Systems, 2009
A Stimulus-Centric Algebraic Approach to Sensors and Observations.
Proceedings of the GeoSensor Networks, Third International Conference, 2009
A Functional Ontology of Observation and Measurement.
Proceedings of the GeoSpatial Semantics, Third International Conference, 2009
Grounding Geographic Categories in the Meaningful Environment.
Proceedings of the Spatial Information Theory, 9th International Conference, 2009
2008
Semantic Similarity Measurement and Geospatial Applications.
Trans. GIS, 2008
Next-Generation Digital Earth: A position paper from the Vespucci Initiative for the Advancement of Geographic Information Science.
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Int. J. Spatial Data Infrastructures Res., 2008
Road Networks and Their Incomplete Representation by Network Data Models.
Proceedings of the Geographic Information Science, 5th International Conference, 2008
Similarity as a Quality Indicator in Ontology Engineering.
Proceedings of the Formal Ontology in Information Systems, 2008
2007
Editorial: Cognitive Semantics and Spatio-Temporal Ontologies.
Spatial Cogn. Comput., 2007
An Image-Schematic Account of Spatial Categories.
Proceedings of the Spatial Information Theory, 8th International Conference, 2007
Geospatial Information Bottom-Up: A Matter of Trust and Semantics.
Proceedings of the European Information Society: Leading the Way with Geo-information, 2007
2006
Ontology-based discovery of geographic information services - An application in disaster management.
Comput. Environ. Urban Syst., 2006
2005
Geospatial Semantics: Why, of What, and How?
J. Data Semant., 2005
Measuring Semantic Differences Between Conceptualisations: The Portuguese Water Bodies Case - Does Education Matter?
Proceedings of the On the Move to Meaningful Internet Systems 2005: OTM 2005 Workshops, 2005
Semantische Interoperabilität.
Proceedings of the 35. Jahrestagung der Gesellschaft für Informatik, 2005
2004
Ontology-Based Task Simulation.
Spatial Cogn. Comput., 2004
Formalizing User Actions for Ontologies.
Proceedings of the Geographic Information Science, Third International Conference, 2004
Comparing Approaches for Semantic Service Description and Matchmaking.
Proceedings of the On the Move to Meaningful Internet Systems 2004: CoopIS, 2004
2003
Semantic reference systems.
Int. J. Geogr. Inf. Sci., 2003
Granularity Transformations in Wayfinding.
Proceedings of the Spatial Cognition III, Routes and Navigation, Human Memory and Learning, 2003
2002
Modeling the Semantics of Geographic Categories through Conceptual Integration.
Proceedings of the Geographic Information Science, Second International Conference, 2002
2001
Ontologies in support of activities in geographical space.
Int. J. Geogr. Inf. Sci., 2001
2000
Functional Specifications of Multilevel Highway Navigation.
Proceedings of the 9th International Workshop on Functional and Logic Programming, 2000
Advantages of using Functional Languages in specifying GIS operations.
Proceedings of the 9th International Workshop on Functional and Logic Programming, 2000
1999
Landscape Editing with Knowledge-Based Measure Deductions for Ecological Planning.
Proceedings of the Integrated Spatial Databases, Digital Inages and GIS, 1999
What Are Sports Grounds? Or: Why Semantics Requires Interoperability.
Proceedings of the Interoperating Geographic Information Systems, 1999
An Algebraic Interpretation of Semantic Networks.
Proceedings of the Spatial Information Theory: Cognitive and Computational Foundations of Geographic Information Science, 1999
1998
Finite-Resolution Simplicial Complexes.
GeoInformatica, 1998
1996
Spatialization: spatial metaphors for user interfaces.
Proceedings of the Conference on Human Factors in Computing Systems: Common Ground, 1996
1995
Keynote: Pictures that Show Us the Way: Geographic Information Systems and Visual Languages.
Proceedings of the Proceedings 11th International IEEE Symposium on Visual Languages, 1995
Specifying Open GIS with Functional Languages.
Proceedings of the Advances in Spatial Databases, 1995
1994
A keystroke level analysis of a graphics application: manual map digitizing.
Proceedings of the Conference on Human Factors in Computing Systems, 1994
1993
Metaphors Create Theories For Users.
Proceedings of the Spatial Information Theory: A Theoretical Basis for GIS, 1993
A Keystroke Level Analysis of Manual Map Digitizing.
Proceedings of the Spatial Information Theory: A Theoretical Basis for GIS, 1993
1991
Specifying metaphors algebraically.
ACM SIGCHI Bull., 1991
CHI'90 workshop on visual interfaces to geometry.
ACM SIGCHI Bull., 1991
Visualizing Spatial Query Results: The Limitations of SQL.
Proceedings of the Visual Database Systems, II. Proceedings of the IFIP TC2/WG 2.6 Second Working Conference on Visual Database Systems. Budapest, Hungary, 30 September, 1991
1989
Interaktion mit raumbezogenen Informationssystemen: vom Konstruieren zum Editieren geometrischer Modelle.
PhD thesis, 1989