74 citations · 376 across the 30 of their papers we have counts for
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cs.AI2009★ 73 cited
Reasoning about Cardinal Directions between Extended Objects
Xiaotong Zhang, Weiming Liu, Sanjiang Li +1
Direction relations between extended spatial objects are important commonsense knowledge. Recently, Goyal and Egenhofer proposed a formal model, known as Cardinal Direction Calculu…
cs.AI2009
Reasoning with Topological and Directional Spatial Information
Sanjiang Li, Anthony G. Cohn
Current research on qualitative spatial representation and reasoning mainly focuses on one single aspect of space. In real world applications, however, multiple spatial aspects are…
cs.AI2009
On the Internal Topological Structure of Plane Regions
Sanjiang Li
The study of topological information of spatial objects has for a long time been a focus of research in disciplines like computational geometry, spatial reasoning, cognitive scienc…