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• W3215933786 abstract "The range query is one of the most important query types in spatial data processing. Geographic information systems use it to find spatial objects within a user-specified range, and it supports data mining tasks, such as density-based clustering. In many applications, ranges are not computed in unrestricted Euclidean space, but on a network. While the majority of access methods cannot trivially be extended to network space, existing network index structures partition the network space without considering the data distribution. This potentially results in inefficiency due to a very skewed node distribution. To improve range query processing on networks, this paper proposes a balanced Hierarchical Network index (HN-tree) to query spatial objects on networks. The main idea is to recursively partition the data on the network such that each partition has a similar number of spatial objects. Leveraging the HN-tree, we present an efficient range query algorithm, which is empirically evaluated using three different road networks and several baselines and state-of-the-art network indices. The experimental evaluation shows that the HN-tree substantially outperforms existing methods." @default.
• W3215933786 created "2021-12-06" @default.
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• W3215933786 date "2021-12-01" @default.
• W3215933786 modified "2023-09-23" @default.
• W3215933786 title "A Hierarchical Spatial Network Index for Arbitrarily Distributed Spatial Objects" @default.
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• W3215933786 doi "https://doi.org/10.3390/ijgi10120814" @default.
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