Topology is an important kind of knowledge in Geographical Information Systems (GISs). In this paper a small set of user-oriented topological relationships and operators is used as formal background for the implementation of topology on top of the O2 Database Management System (DBMS). Object-oriented (O-O) systems allow to model geometric data and topological relationships thanks to the object identity, the modeling flexibility, the inheritance, and the overriding/overloading features. The representation adopted for the topology is a trade-off between avoiding data redundancy and maintaining database schema independence. Examples of topological queries in O2SQL conclude the paper.
Topology in an O-O GIS
CLEMENTINI, ELISEO;
1994-01-01
Abstract
Topology is an important kind of knowledge in Geographical Information Systems (GISs). In this paper a small set of user-oriented topological relationships and operators is used as formal background for the implementation of topology on top of the O2 Database Management System (DBMS). Object-oriented (O-O) systems allow to model geometric data and topological relationships thanks to the object identity, the modeling flexibility, the inheritance, and the overriding/overloading features. The representation adopted for the topology is a trade-off between avoiding data redundancy and maintaining database schema independence. Examples of topological queries in O2SQL conclude the paper.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
