| Model | R² |
|---|
Each point is one grid cell with both a real land listing and a real SSURGO measurement (n as above). The line is the best-fit model above, evaluated across the observed quality range.
Residual = actual $/acre − price predicted from soil quality alone. A spread centered near zero with no shape vs. quality means soil quality has little predictive power; this is what the relative-expensiveness map layer is built from, min-max normalized 0–1.