Spatial relationships are core components in the design and definition of spatial queries. A
spatial relationship determines how two or more spatial objects are related or connected in …

Representation and reasoning with qualitative spatial relations is an important problem in
artificial intelligence and has wide applications in the fields of geographic information …

Starting with an updated description of Allen's calculus, the book proceeds with a description
of the main qualitative calculi which have been developed over the last two decades. It …

Increasing the expressiveness of qualitative spatial calculi is an essential step towards
meeting the requirements of applications. This can be achieved by combining existing …

Direction relations between extended spatial objects are important commonsense
knowledge. Recently, Goyal and Egenhofer proposed a relation model, known as the …

The description models for spatial relations, especially those for direction relations, have
gained increasing attention in GIS and Cartography community in recent decades. In this …

Qualitative spatial representation and reasoning plays a important role in various spatial
applications. In this paper we introduce a new formalism, we name RCD calculus, for …

The cardinal direction calculus (CDC) proposed by Goyal and Egenhofer is a very
expressive qualitative calculus for directional information of extended objects. Early work …

Directional relation, as a kind of spatial constraints, has been recognized as being an
important means for spatial query, analysis and reasoning. Directional relation is …

Semantic understanding of high spatial resolution remote sensing (RS) images can be
divided into object detection, object labelling, identification of geospatial relationships, and …