By Manolis Koubarakis, Timos Sellis, Andrew U. Frank, Stéphane Grumbach, Ralf Hartmut Güting, Christian S. Jensen, Nikos Lorentzos, Yannis Manolopoulos, Enrico Nardelli, Barbara Pernici, Hans-Jörg Schek, Michel Scholl, Babis Theodoulidis, Nectaria Tryfona
This booklet summarizes in a well timed and consultant demeanour examine performed within the CHOROCHRONOS venture, confirmed as an EC funded education and Mobility learn community with the target of learning the layout, implementation, and alertness of spatio-temporal database administration systems.
The 9 coherent chapters via top study teams are written in an instructional variety, making the learn contributions of the undertaking obtainable to a much broader viewers attracted to spatio-temporal details processing. Follwing an introductory review, the e-book offers chapters on ontologies for spatio-temporal databases, conceptual types, spatio-temporal versions and languages, entry tools and question processing, architectures and implementation of spatiotemporal DBMS, interactive spatio-temporal files, and destiny perspectives.
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Additional info for Spatio-Temporal Databases: The CHOROCHRONOS Approach
Water ﬂows under the force of gravity over surfaces and forms rivers at the bottom of valleys. Streams form a linear network and watersheds form a functionally deﬁned subdivision of space – for every point along a street network there exists a corresponding watershed (namely all the area from which water ﬂows to this point) [90,152,153]. Couclelis has pointed out the contradiction between objects and ﬁelds: “people manipulate objects but cultivate ﬁelds” . The surface of the earth is divided into parcels, which are manipulated like objects, bought and sold like books or shoes.
2 Measurement Units Measurements describe the quantity or intensity of some properties at a given point in comparison with the intensity at some other, standard, point or standard situation. Well known is the former meter standard, deﬁned as the distance between two marks on a physical object manufactured from precious metal and kept in Paris (it is superseded today by a new deﬁnition, which links to a physical process that can be reproduced at any location). The temperature of melting ice is used as the reference point for the Celsius scale .
Second-order formalizations are extremely useful to deal with spatio-temporal data types. , instant) yields a point in space. In a second-order language, such functions are properly typed (they have a type described as movingP oint :: Instant → Location). Operations can be applied to such “function types”, for example, two movements can be added; in a polymorphic language like Haskell, the operation “+” can be lifted to extend to this new data type movingP oint and thus it becomes possible to add two movements simply with the operation “+”.