Abstract
Given a set of points in two dimensional space, a minimum radius, a minimum log likelihood ratio and a significance threshold, Geographically Robust Hotspot Detection (GRHD) finds hotspot areas where the concentration of points inside is significantly high. The GRHD problem is societally important for many applications including environmental criminology, epidemiology, etc. GRHD is computationally challenging due to the difficulty of enumerating all possible candidate hotspots and the lack of monotonicity property for the interest measure, namely the log likelihood ratio test. Related work may miss hotspots when hotspots are divided by geographic barriers (the road network, rivers etc.) or when hotspot centers are close to parks, lakes, mountains, etc. To address these limitations, a novel approach is proposed based on two ideas: cubic grid circle enumeration and a grid log likelihood ratio upper bound. A case study on real crime data shows that the proposed approach finds hotspots which cannot be discovered by the related work. Experimental results show that the proposed algorithm yields substantial computational savings compared to the related work.
Original language | English (US) |
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Title of host publication | Proceedings - 15th IEEE International Conference on Data Mining Workshop, ICDMW 2015 |
Editors | Xindong Wu, Alexander Tuzhilin, Hui Xiong, Jennifer G. Dy, Charu Aggarwal, Zhi-Hua Zhou, Peng Cui |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1447-1456 |
Number of pages | 10 |
ISBN (Electronic) | 9781467384926 |
DOIs | |
State | Published - Jan 29 2016 |
Event | 15th IEEE International Conference on Data Mining Workshop, ICDMW 2015 - Atlantic City, United States Duration: Nov 14 2015 → Nov 17 2015 |
Publication series
Name | Proceedings - 15th IEEE International Conference on Data Mining Workshop, ICDMW 2015 |
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Other
Other | 15th IEEE International Conference on Data Mining Workshop, ICDMW 2015 |
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Country/Territory | United States |
City | Atlantic City |
Period | 11/14/15 → 11/17/15 |
Bibliographical note
Funding Information:This material is based upon work supported by the National Science Foundation under Grant No. 1029711, IIS-1320580, 0940818 and IIS-1218168, USDOD under Grant No. HM1582-08-1-0017, HM0210-13-1-0005, and University of Minnesota via U-Spatial. We would like to thank Kim Koffolt and the members of the University of Minnesota Spatial Computing Research Group for their comments.
Keywords
- Hotspot Detection
- Spatial Data Mining
- Spatial Scan Statistics