Table 1 Comparison of population sizes among the population sampling units for quadtree and uniform grid cell (UGC) 1 × 1 km and 3 × 3 km population sampling frame at the country scale
| Statistical summary | Quadtree | Uniform grid cell | |
|---|---|---|---|
| 1 × 1 km | 3 × 3 km | ||
| Minimum | 0 | 0 | 0 |
| Maximum | 3498 | 42,384 | 129,132 |
| Mean | 44 | 16 | 122 |
| Standard deviation | 232 | 330 | 1648 |
| Coefficient of variation | 5 | 20 | 14 |