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. 2020 Jul 27;20(15):4171. doi: 10.3390/s20154171

Figure 4.

Figure 4

The experimental area with 887,950 points. This area currently contains 6 special municipalities, 10 counties and 3 provincial cities. These subareas are numbered as 1–19: (a) The number of points in each subarea. (b) The point ratio of each subarea to 16 subareas.