Title :
A logical data model for integrated geographical databases
Author :
Gargano, M. ; Nardelli, E.
Author_Institution :
Istituto di Analisi dei Sistemi ed Inf., Rome, Italy
Abstract :
An approach to the design and the development of geographical database systems based on the integration of different specialized databases is investigated. This approach is supported by an extension of the relational model which makes it possible to separate interaction issues from integration issues, guaranteeing independence between the logical level and the physical level. The introduced extended logical model guarantees to the user a uniform and expressive view of geographical entities, while making it possible to refer to them and access them through both descriptive and geometrical/spatial characteristics. On the other hand, the logical model gives the designer a formal methodology and formal framework for the correct specification of the geographical information at the logical level
Keywords :
database theory; geographic information systems; relational databases; descriptive characteristics; formal methodology; geometrical/spatial characteristics; information specification; integrated geographical databases; interaction; logical data model; logical level/physical level independence; relational model; specialized databases; Application software; Data models; Data processing; Database systems; Design methodology; Information systems; Management information systems; Power system reliability; Relational databases; Spatial databases;
Conference_Titel :
Systems Integration, 1990. Systems Integration '90., Proceedings of the First International Conference on
Conference_Location :
Morristown, NJ
Print_ISBN :
0-8186-9027-5
DOI :
10.1109/ICSI.1990.138713
