Parallel Algorithm of Spatial Relationship Query between Polygons Based on Heterogeneous Multi-core Architecture

doi:10.11947/j.AGCS.2016.20140463

Abstract

Abstract: The commonly used Plane Sweep algorithm in the spatial relationship query is a serial algorithm, when dealing with huge amounts of spatial data, the efficiency is very low,and the existing parallel computing method is not applicable to normal computer. Aiming at this problem, this paper proposes a parallel algorithm of spatial relationship query between polygons based on heterogeneous multi-core architecture. The algorithm uses STR-tree index to filter out non-intersection polygons first, then decomposes the filtered polygons data into points set and edges set, and constructs a quadtree index for them; under the premise of data accuracy meets the requirement of floating point calculation, uses GPU's powerful batch computing power quickly processing the intersection between edges and calculates the topology relationship between rings, then uses the topology relationship between rings to calculate the DE-9IM model between polygons; compares the DE-9IM model with spatial relationship query condition and outputs the query results. At last, the efficiency and accuracy of the algorithm is verified by experiment.

Key words: heterogeneous multi-core, parallel computing, topological relations, querying spatial relationship

CLC Number:

P208

XIE Chuanjie, LONG Zhou, MA Yihang, YOU Zhijie. Parallel Algorithm of Spatial Relationship Query between Polygons Based on Heterogeneous Multi-core Architecture[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(1): 119-126.

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