2015/11/02 by Mohamad Dolatshah, Dolatshah, Mohamad, Ali Hadian +4 · 3 citations
Computer Science · Social Sciences · #Algorithms and Data Compression #Computational Geometry (cs.CG) #Data Management and Algorithms #Data Mining Algorithms and Applications #Data Structures and Algorithms (cs.DS) #Databases (cs.DB) #FOS: Computer and information sciences #Geographic Information Systems Studies #cs.CG #cs.DB #cs.DS
paper · pdf · doi:10.48550/arxiv.1511.00628
15 pages, 7 figures
arxiv created 2015/11/02 · openalex publication_date 2015/11/02 · arxiv updated 2015/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Emerging location-based systems and data analysis frameworks requires efficient management of spatial data for approximate and exact search. Exact similarity search can be done using space partitioning data structures, such as Kd-tree, R*-tree, and Ball-tree. In this paper, we focus on Ball-tree, an efficient search tree that is specific for spatial queries which use euclidean distance. Each node of a Ball-tree defines a ball, i.e. a hypersphere that contains a subset of the points to be searched. In this paper, we propose Ball*-tree, an improved Ball-tree that is more efficient for spatial queries. Ball*-tree enjoys a modified space partitioning algorithm that considers the distribution of the data points in order to find an efficient splitting hyperplane. Also, we propose a new algorithm for KNN queries with restricted range using Ball*-tree, which performs better than both KNN and range search for such queries. Results show that Ball*-tree performs 39%-57% faster than the original Ball-tree algorithm.