Results of simple linear regression analysis of crown volume computed using UrbanCrowns image analysis software, regressed with crown volume, and calculated using equations for geometric solids. Each regression model is based on measurements for 50 open-grown sugar maples with crown volumes ranging from 5 m3 to 5,168 m3.
| Regression attribute | Geometric solid | |||
|---|---|---|---|---|
| Sphere | Vertical ellipsoid | Circular paraboloid | Conical frustum | |
| P-value (Ho: B1 = 0) | <0.0001 | <0.0001 | <0.0001 | <0.0001 |
| Adjusted R2 | 0.9460 | 0.9783 | 0.9783 | 0.9783 |
| B0 | 161.5 | 52.1 | 52.1 | 52.1 |
| B1 | 1.0033 | 0.5335 | 1.4226 | 1.0109 |