Hornsby, J., Egenhofer, M.J. (2000). Identity-based change: a foundation for spatio-temporal knowledge representation. International Journal of Geographical Information Science, 14(3):207-224.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....On the other hand, temporality is an inherent aspect of geo information. Time is a fundamental dimension for understanding and modelling of geographic phenomena. Modelling time in GIS has been investigated [41, 22] Spatio temporal reasoning [60, 62] and reasoning about spatio temporal changes [13, 61, 38] has also become of interest. One way to incorporate the notion of time into spatial representations would be to have some combination of spatial and temporal logics. There exists a variety of spatial formalisms [14, 49, 15, 42] and a wide spectrum of temporal languages [3, 25, 55] Effective ....

....within time geography where individual trajectories are analysed and compared using an integrated time and space model (see for e.g. 31] However, there has hardly been any work on spatio temporal reasoning in GIS under an integrated space time semantics . Taxonomies of spatial changes [13, 38] and transitive changes of spatial relationships [21, 49, 28] have been identified. Work has been done on spatio temporal relations [53, 26, 56] but this is largely based on approximating spatial objects by minimum bounding rectangles (MBR) Extending the MBRs in time, parallelpiped shapes are ....

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K. Hornsby and Max J. Egenhofer, `Identity-based changes: A foundation for spatio-temporal knowledge representation', International Journal of Geographical Information Science, 14(3), 207--224, (2000).

....4: Implications between the six Compound Concepts introducing problems which are speci c to spatial data. A unifying model of temporal granularities, independent of spatial issues, is proposed by Bettini et al. BJW00] Hornsby and Egenhofer have proposed a change description language [HE97, HE00] capable of modelling changes, over time. In other work [HE99] they have addressed views at various levels of detail of objects which are subject to change. This uses a lattice of levels of detail in a similar way to Stell and Worboys strati ed map spaces [SW98] Medak [Med99] has proposed a ....

K. Hornsby and M. Egenhofer. Identity-based change: a foundation for spatio-temporal knowledge representation. International Journal of Geographical Information Science, 14:207-224, 2000.

....systems (GISs) fall short of conveying the rich and complex ways in which phenomena change over space and time. One of the major limitations of today s systems, for example, is that they capture only a snapshot of reality, reliant as they are on databases that contain only current data [ Hornsby and Egenhofer, 2000] . 1 based on classical quantitative models of kinematics (see e.g. Rajagopalan and Kuipers, 1994; Hays, 1989 ] surprisingly little has been done to design qualitative spatio temporal representation formalisms [ Vieu, 1991; Galton, 1997; Muller, 1998; Hornsby and Egenhofer, 2000; Wolter and ....

.... data [ Hornsby and Egenhofer, 2000] 1 based on classical quantitative models of kinematics (see e.g. Rajagopalan and Kuipers, 1994; Hays, 1989 ] surprisingly little has been done to design qualitative spatio temporal representation formalisms [ Vieu, 1991; Galton, 1997; Muller, 1998; Hornsby and Egenhofer, 2000; Wolter and Zakharyaschev, 2000b ] let al..one implementations. More refs Or fewer Although a deep ontological analysis of qualitative spatio temporal entities seems still missing [ Vieu, 1997 ] yet there is a quite simple naive approach to constructing such formalisms. Just take your ....

K. Hornsby and M. Egenhofer. Identity-based change: a foundation for spatio-temporal knowledge representation. International Journal of Geographical Information Science, 14:207--224, 2000. 36

....but there is no dependency between the sources used. It is applied on the parent database, the GID. At this level, the object is treated as an entity, as described above, with no further spatiotemporal attributes. This type of queries has been addressed in the past, as identity based queries [8]. 2) Existence of Object s Change At this level, the user can have a simple Yes No answer to a query whether there exist any evidence of change for a specific object. This query is differential in nature, since two or more sources are required. Queries of this type [7] are executed in the Change ....

K. Hornsby and M. Egenhofer, "Identity-based change: a foundation for spatio-temporal knowledge representation", International Journal of Geographical Information Science.14(3). To appear.

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Hornsby, J., Egenhofer, M.J. (2000). Identity-based change: a foundation for spatio-temporal knowledge representation. International Journal of Geographical Information Science, 14(3):207-224.

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K. Hornsby and M. Egenhofer. Identity-Based Change: A Foundation for Spatio-Temporal Knowledge Representation. International Journal of Geographical Information Science. 14(3):207-224,2000.

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K. Hornsby and M. Egenhofer. Identity-Based Change: A Foundation for Spatio-Temporal Knowledge Representation. International Journal of Geographical Information Science. 14(3):207-224,2000.

....between the image and application ontologies, we create a framework that emphasizes the detection of spatial temporal configurations of geographic phenomena, taken here as identifiable structural elements present in an image. This idea is consistent with the identity based modeling of change [22], where object identity is proposed as a central notion for modeling spatial temporal change. The framework allows an object, identified as part of the user ontology, to be related to different descriptions in an image time series. Consider, for example, mapping urban sprawl for a city by ....

Hornsby, K. and M. Egenhofer, Identity-Based Change: A Foundation for SpatioTemporal Knowledge Representation. International Journal of Geographical Information Science, 2000. 14(3): p. 207-224.

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