Determining the optimal spatial scan of Prospective space-time scan statistics (PSTSS) for crime hotspot prediction
Determining the optimal spatial scan of Prospective space-time scan statistics (PSTSS) for crime hotspot prediction
复制标题
确定用于犯罪热点预测的前瞻性时空扫描统计(PSTSS)的最佳空间扫描
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
T. Cheng
中科院分区:
文献类型:
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作者:
M. Adepeju;T. Cheng
The input value for the maximum spatial scan extent (K) of a prospective space-time scan statistical (PSTSS) technique is one important parameter that ensures accurate detection of the predictive hotspot of a geographical point events. Currently, there is no general consensus on how to determine the optimal value of K that maximises the predictive accuracy, especially in crime hotspot prediction. To address this issue, this study proposes a strategy in which different values of K are used to generate accuracy profiles that can be compared to determine optimal value of K. A case study presented shows that the best accuracy is obtained at K=250m, which is equivalent to the spatial aggregation of the crime dataset used. It is contended that this strategy could be extended to other geographical surveillance tasks.