Abstract
In advanced spatio-temporal scenarios, such as the simulation of complex geo-processes, the analysis of complex surface- and volume-based objects changing their locations and shapes in time is a central task. For example, the documentation of landfills, mass movements or volcanic activities requires 4D modeling based on dynamic geometric and topological database structures. In this contribution we present our concepts and implementation efforts for the effective handling of geospatial and time-dependent data realized in DB4GeO, a service-based geo-database architecture. The topological and geometric data models of DB4GeO are described in detail. A geoscientific application of an open-pit mine demonstrates the usefulness of the concepts introduced at the beginning of the paper. Finally, an outlook is given on future geo-database work dealing with extensions of DB4GeO and the handling of geo-objects in the context of cooperative 4D metro tracks planning
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Notes
- 1.
For an elaborate UML class diagram of the DB4GeO kernel geo-object model cf. Bär (2007), p. 65.
- 2.
For a visual overview of the geometry model of DB4GeO, cf. Butwilowski and Breunig (2010).
- 3.
This structure can be seen as the implicit topology model of the DB4GeO/DB3D core API.
- 4.
For example, if it is necessary to find all neighboring segments to a given point.
- 5.
i.e. of objects of the classes Node, Edge, Face and Solid.
- 6.
These are not illustrated in Fig. 5 to reduce the diagram’s complexety.
- 7.
Though, to be more precise, orbits are not only iterators but circulators (Devillers et al. 2011).
- 8.
The OrbitIterator does not provide a remove() method (in conformity with the orbit definition).
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Acknowledgments
We thank Jürgen Berlekamp from USF, Osnabrück University and the Survey Office of Osnabrück city for the permission to use the Piesberg dataset for scientific purposes.This research has been funded by the German Research Foundation (DFG), grant no. BR2128/12-1 and BR2128/14-1.
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Breunig, M., Butwilowski, E., Kuper, P.V., Golovko, D., Thomsen, A. (2013). Topological and Geometric Data Handling for Time-Dependent Geo-Objects Realized in DB4GeO. In: Timpf, S., Laube, P. (eds) Advances in Spatial Data Handling. Advances in Geographic Information Science. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32316-4_1
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