Qiuliang XIANG, Qunyong WU, Liangpan ZHANG. An OD Flow Spatio-temporal Joint Clustering Algorithm based on Step-by-step Merge Strategy [J]. Journal of Geo-information Science, 2020, 22(6): 1394
- Journal of Geo-information Science
- Vol. 22, Issue 6, 1394 (2020)
Fig. 1. Comparison diagram of OD flow spatial similarity relationship
Fig. 2. OD flow time similarity relationship judgment
Fig. 3. Relationship between ratio and sim
Fig. 4. Flow chart of step-by-step merge strategy
Fig. 5. Comparison diagram of clusters' consolidation condition
Fig. 6. Clusters' merging order and results under different clustering methods
Fig. 7. Comparison of spatial ranges of flow clusters under different values of parameter k
Fig. 8. Comparison of flow clusters under different values of time parameter。。。
Fig. 9. Chengdu's OD flow clusters of a large number at early rush hour and late rush hour
Fig. 10. Top five flow clustersof New YorkCitytaxi data discovered by our method
Fig. 11. Centers of flow clusters of New York City taxi data with different volumes。。。
Fig. 12. Top five flow clustersof New York City taxi data discovered by Gao's method
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Table 1. The similarity value between the OD flows of the synthesized sample data
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