Abstract
Geographic database systems, known as geographic information systems (GISs) particularly among non-computer scientists, are one of the most important applications of the very active research area named spatial database systems. Consequently following the database approach, a GIS has to be seamless, i.e. store the complete area of interest (e.g. the whole world) in one database map. For exhibiting acceptable performance a seamless GIS has to use spatial access methods. Due to the complexity of query and analysis operations on geographic objects, state-of-the-art computational geometry concepts have to be used in implementing these operations. In this paper, we present GIS operations based on the compuational geometry technique plane sweep. Specifically, we show how the two ingredients spatial access methods and computational geometry concepts can be combined for improving the performance of GIS operations. The fruitfulness of this combination is based on the fact that spatial access methods efficiently provide the data at the time when computational geometry algorithms need it for processing. Additionally, this combination avoids page faults and facilitates the parallelization of the algorithms.
This work was supported by grant no. Kr 670/4-3 from the Deutsche Forschungsgemeinschaft (German Research Society) and by the Ministry of Environmental and Urban Planning of Bremen
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Kriegel, HP., Brinkhoff, T., Schneider, R. (1991). The combination of spatial access methods and computational geometry in geographic database systems. In: Günther, O., Schek, HJ. (eds) Advances in Spatial Databases. SSD 1991. Lecture Notes in Computer Science, vol 525. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-54414-3_28
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DOI: https://doi.org/10.1007/3-540-54414-3_28
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