The perception of size and form of tactile objects relies on visualization, at least for people who are sighted or those who have had longer experience of seeing (‘late blind’, Warren 1994). Non-visual alternative representations are 3D tactile or acoustic representations. This paper describes an auditory display (Agranovski et all 1996), that provides simultaneous playback and management by ei...

Practical needs in the realm of Geographic Information Systems (GISs) have driven the efforts to investigate formal and sound methods to describe spatial relations. After an introduction of the basic ideas and notions of topology, a novel theory of topological spatial relations between sets is developed in which the relations are defined in terms of the intersections of the boundaries and inter...

Topology is a central, deŽ ning feature of geographical information systems (GIS). The advantagesof topological data structures are that data storage for polygons is reduced because boundaries between adjacent polygons are not stored twice, explicit adjacency relations are maintained, and data entry and map production is improved by providing a rigorous, automated method to handle artifacts of ...

The meaning of spatial relations have been intensively studied in cognitive science research. A spatial template is one of the typical representations of spatial relations, which maps a position of a located object to its acceptability for the corresponding spatial term. Spatial templates have been investigated for several orthogonal spatial relations. However, diagonal spatial relations have a...

The logic UBiSKt is a bi-intuitionistic modal with universal modalities having semantics in which formulae are interpreted as subgraphs. We use the to formalize idea of looking at subgraphs different levels detail. show how can be used define various spatial relations between These considered respect change level an existing formulation generalized partitions on graphs and hypergraphs terms giv...