Designing the structure of the spatial data distributed base in complex structured hierarchic geographical information systems
Abstract
Designing the structure of the spatial data distributed base in complex structured hierarchic geographical information systems
Incoming article date: 30.12.2014Today geographical information systems are used by operating companies for solving extensive distributed utility networks service and development issues. Designing and the subsequent creation of geographically distributed corporate enterprise geodatabase is needed for taking into account the requirements imposed by all divisions of the enterprise on GIS. On account of the complex distributed multi-level structure of the enterprise database the detailed consideration of all elements, parts of the enterprise geodatabase, is required. The enterprise database structure has been considered from the point of view of the database elements. The database of the whole enterprise is a set of databases of enterprise local subdivisions. The divisions use data about neighboring division territories in their work to perform their tasks. The subdivision database consists of two parts: a unique chunk and data about neighboring division objects. The base of the common data includes objects information which is required for more than one local subdivision. The data required for three neighboring divisions is a crosscutting of three neighboring division databases. Corporate database and entering into its composition local subdivision databases consist also of an attributive and spatial information. Besides it is necessary to perform spatial differentiation, layer differentiation and attributive field differentiation for more flexible monitoring of access permissions in the database. The suggested approach based on the set-theoretical spatial data presentation and analysis allows to realize the consistent structure of the distributed database.
Keywords: geographical information systems, corporate geodatabase, distributed database, database structure designing.