A Novel Spatial Clustering Algorithm with Sampling

  • Authors:
  • Cai-Ping Hu;Xiao-Lin Qin;Jun Zhang

  • Affiliations:
  • College of Information Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, China;College of Information Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, China;College of Information Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, China

  • Venue:
  • MDAI '07 Proceedings of the 4th international conference on Modeling Decisions for Artificial Intelligence
  • Year:
  • 2007

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Abstract

Spatial clustering is one of the very important spatial data mining techniques. So far, a lot of spatial clustering algorithms have been proposed. DBSCANis one of the effective spatial clustering algorithms, which can discover clusters of any arbitrary shape and handle the noise effectively. However, it has also several disadvantages. First, it does based on only spatial attributes, does not consider non-spatial attributes in spatial databases. Secondly, when DBSCANdoes handle large-scale spatial databases, it requires large volume of memory support and the I/O cost. In this paper, a novel spatial clustering algorithm with sampling (NSCAS) based on DBSCANis developed, which not only clusters large-scale spatial databases effectively, but also considers spatial attributes and non-spatial attributes. Experimental results of 2-D spatial datasets show thatNSCASis feasible and efficient.