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Автор: Brian E.Weinrich
Год: 2009
Издание:
LAP Lambert Academic Publishing
Страниц: 172
ISBN: 9783838335445
Previous work with spatial database systems has dealt mostly with two dimensions and more with implementation than with design issues. This dissertation deals with the formal design of three- dimensional spatial database systems and with the need for abstraction in the design. Use of abstraction in the formal design of data models allows a database system developer to consider the comprehensive needs of users at an ideal level unencumbered by implementation details. The dissertation also presents a set of robust three- dimensional geometric primitives that could form the core of a discrete data model. Although a discrete data model is more concrete than SPAL3D, it has some abstraction. The dissertation offers a precise and conceptually clean specification and foundation for implementing a Database Management System (DBMS) extension for three-dimensional data. Assuming the existence of an implementation of this type system, it demonstrates the embedding of the ...
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Rerum Ab Arabibus In Italia Insulisque, Adjacentibus Sicilia Maxime, Sardinia Atque Corsica Gestarum Commentarii. Scripsit Joannes Georgius Wenrich (Latin Edition)