{
 "purpose": "measured operating envelope of the DINOv3 vision layer",
 "validated_against": "GHS-POP (never seen by the model)",
 "criterion": "Spearman rho(population density, BUILT fraction) > 0.25 within the band",
 "bands": [
  {
   "lo": -90,
   "hi": -45,
   "n": 424,
   "rho": 0.8678,
   "trusted": true
  },
  {
   "lo": -45,
   "hi": -23,
   "n": 4856,
   "rho": 0.7308,
   "trusted": true
  },
  {
   "lo": -23,
   "hi": 0,
   "n": 10061,
   "rho": 0.699,
   "trusted": true
  },
  {
   "lo": 0,
   "hi": 23,
   "n": 14621,
   "rho": 0.8491,
   "trusted": true
  },
  {
   "lo": 23,
   "hi": 45,
   "n": 21183,
   "rho": 0.7943,
   "trusted": true
  },
  {
   "lo": 45,
   "hi": 55,
   "n": 9962,
   "rho": 0.774,
   "trusted": true
  },
  {
   "lo": 55,
   "hi": 60,
   "n": 4154,
   "rho": 0.314,
   "trusted": true
  },
  {
   "lo": 60,
   "hi": 66,
   "n": 3719,
   "rho": -0.039,
   "trusted": false
  },
  {
   "lo": 66,
   "hi": 90,
   "n": 2052,
   "rho": 0.1873,
   "trusted": false
  }
 ],
 "trusted_bands": [
  [
   -90,
   -45
  ],
  [
   -45,
   -23
  ],
  [
   -23,
   0
  ],
  [
   0,
   23
  ],
  [
   23,
   45
  ],
  [
   45,
   55
  ],
  [
   55,
   60
  ]
 ],
 "population_share_inside_envelope": 0.9955,
 "policy": "Outside the trusted bands the imagery-derived class is not used. FR-17b falls back to the ground datasets, and reports UNEVALUATED if those cannot characterise the cell either. The layer is never silently trusted where we have measured that it fails."
}