• Publications
  • Influence
Reasoning About Ordering
  • C. Schlieder
  • Mathematics, Computer Science
  • 21 September 1995
We introduce a system of line segment relations which generalizes Allen's system of interval relations to two dimensions. Expand
  • 149
  • 14
Preferred and Alternative Mental Models in Spatial Reasoning
The mental model theory postulates that spatial reasoning relies on the construction, inspection, and the variation of mental models. Expand
  • 72
  • 11
  • PDF
Designing location-based mobile games with a purpose: collecting geospatial data with CityExplorer
The games with a purpose paradigm proposed by Luis von Ahn [9] is a new approach for game design where useful but boring tasks, like labeling a random image found in the web, are packed within a game to make them entertaining. Expand
  • 111
  • 9
  • PDF
Representing Visible Locations for Qualitative Navigation
  • 63
  • 8
TeDUB: A System for Presenting and Exploring Technical Drawings for Blind People
Blind people can access and use textual information effectively in a variety of ways - through Braille, audiotape or computer-based systems. Expand
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  • 5
Representing the Meaning of Spatial Behavior by Spatially Grounded Intentional Systems
This paper proposes a representational formalism and a reasoning mechanism for knowledge about an agent who acts according to changing intentions: spatially grounded intentional systems. Expand
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  • 5
A Spatial User Similarity Measure for Geographic Recommender Systems
Recommender systems solve an information filtering task. They suggest data objects that seem likely to be relevant to the user based upon previous choices that this user has made. A geographicExpand
  • 30
  • 4
Preferred mental models in qualitative spatial reasoning: A cognitive assessment of Allen's calculus
An experiment based on Allen's calculus and its transfer to qualitative spatial reasoning, was conducted. Subjects had to find a conclusion X r 3 Z that was consistent with the given premises X r 1 YExpand
  • 128
  • 3
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Geogames: Designing Location-Based Games from Classic Board Games
The traditional image of interactive entertainment - games that reduce players' physical involvement to moving a joy stick - is obsolete. Expand
  • 85
  • 3
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Qualitative Spatial Representation for Information Retrieval by Gazetteers
We propose a new type of spatial footprint that can be described as a qualitative representation of the spatial decomposition of geographic entities. Expand
  • 56
  • 3
  • PDF