From the geometric point of view, knowledge in geographic information systems may be partitioned in topological and metric knowledge. The formalization of both such kinds of information is the basis for the definition of a spatial query language. In this paper, topological information in a two-dimensional space is modeled in terms of binary relationships between spatial objects. Specifically, we propose to group all possible topological situalions into a few meaningful topological relationships to be used in spatial queries . The approach we take has a twofold advantage: it constitutes a good starting point for carrying out an implementation of a spatial query language since we provide formal definitions based on the geometric point-set theory, and it is easy to use since we identify spatial primitives suitable for end-users.
Formalization of Topological Knowledge in Spatial Query Languages
CLEMENTINI, ELISEO;
1993-01-01
Abstract
From the geometric point of view, knowledge in geographic information systems may be partitioned in topological and metric knowledge. The formalization of both such kinds of information is the basis for the definition of a spatial query language. In this paper, topological information in a two-dimensional space is modeled in terms of binary relationships between spatial objects. Specifically, we propose to group all possible topological situalions into a few meaningful topological relationships to be used in spatial queries . The approach we take has a twofold advantage: it constitutes a good starting point for carrying out an implementation of a spatial query language since we provide formal definitions based on the geometric point-set theory, and it is easy to use since we identify spatial primitives suitable for end-users.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
