Table 4 Calculation results of center of gravity trajectory migration of COVID-19 Incidents in China from 2020 to 2022.
From: Analysis and prediction of infectious diseases based on spatial visualization and machine learning
Type | 2020 | 2021 | 2022 |
|---|---|---|---|
Compared with 2020 | Compared with 2021 | ||
Centre of gravity | 30.53°N 112.77°E | 29.65°N 114.39°E | 25.64°N 115.43°E |
Migratory direction | — | Southeast | Southeast |
Migration angle (angle with due east) | — | 20.1° | 65.9° |
Center of gravity migration distance/km | — | 192.31 | 469.23 |
Stage attribute mean | 2998 | 578.66 | 18988.78 |
Attribute change intensity | — | -0.81 | 31.82 |
