Table 2 Standard deviation ellipse analysis results
Dynasty | Center X | Center Y | Ellipse area/km² | Short axis length /m | Long axis length/m | Rotation angle/° | Flattening ratio |
|---|---|---|---|---|---|---|---|
Southern Dynasties | 119.121 | 32.042 | 21274.02 | 46058.22 | 147056.12 | 89.25 | 0.52299534 |
Early Ming | 118.593 | 32.184 | 58279.23 | 84121.25 | 220557.48 | 130.24 | 0.60844414 |
