Compute the green coverage ratio from green space and total area, counting tree canopy at half its projection.
乔木投影按半面积折算为常见做法。
| Item | Formula | Source / Standard |
|---|---|---|
| Green cover | Green/total area ×100% | green coverage |
| Green ratio | G/B land ratio | urban green |
| Standard | >=30% new district | GB 50137 |