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• W2187486021 abstract "With the popularity of Geographic Information Systems, some research efforts have concentrated on producing spatial databases by transforming from conceptual schema into logical schema. This transformation process is achieved by a mapping formalism designed to represent perceptions of the real world to a different formalism designed to provide for data representation in a DBMS that best supports efficient techniques of data management and applications needs. Relational and object-relational databases have developed these transformation techniques already, but they do not work with spatial constructs. Therefore, it is of great value to develop a transformation process for spatial databases that will work in the domain of methods and behaviour. Before a transformational design in the spatial domain can be developed, a mechanism is needed to capture the spatial semantics of real world objects in such a way that a direct database implementation of a conceptual model can be achieved. This mechanism was developed in the research project Design of Spatial Templates for Spatial Database Management Systems in SDI context which is carried out by Helen Ghirmai Asfaha. The main objective of this research is to build a semi-automatic design process for supporting transformational design of spatial databases, based on Design of Spatial Templates for Spatial Database Management Systems in SDI context. In order to achieve this aim a process for transformational design was developed, based on the transformation of conceptual descriptions into syntactic statements of a chosen DBMS. This was done by first, using resources provided by Enterprise Architect 7.0, and creating transformation templates for the spatial constructs. Secondly, an XML parser was implemented in Python, for the transformation of logical to physical schema, that gives as a result a text file with PostGIS DDL statements. PostgreSQL/PostGIS is the selected target DBMS in this thesis." @default.
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• W2187486021 date "2008-01-01" @default.
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• W2187486021 title "Tool Support for Transformational Design of Spatial Databases" @default.
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