{
  "algorithm": "Random Forest",
  "trees": 96,
  "max_depth": 14,
  "min_samples_leaf": 3,
  "seed": 42,
  "training_date": "2021-03-31",
  "training_source": "NASA HLS S30 v2",
  "label_source": "ESA WorldCover 2021 v200 (reference map; not field truth)",
  "split": "Spatial groups, 16 x 16 analysis cells (~960 m blocks). 60% fit / 20% validation / 20% held-out test. Final model refit on development blocks.",
  "train_samples": 16972,
  "test_samples": 4192,
  "validation_samples": 3984,
  "train_blocks": 72,
  "test_blocks": 18,
  "accuracy": 0.9356,
  "macro_f1": 0.681,
  "confusion": [
    [
      3341,
      9,
      57,
      121
    ],
    [
      9,
      9,
      0,
      16
    ],
    [
      5,
      0,
      484,
      0
    ],
    [
      52,
      1,
      0,
      88
    ]
  ],
  "classes": {
    "Vegetation": {
      "precision": 0.9806281185793954,
      "recall": 0.9469954648526077,
      "f1-score": 0.9635183850036049,
      "support": 3528.0
    },
    "Exposed ground": {
      "precision": 0.47368421052631576,
      "recall": 0.2647058823529412,
      "f1-score": 0.33962264150943394,
      "support": 34.0
    },
    "Water": {
      "precision": 0.8946395563770795,
      "recall": 0.9897750511247444,
      "f1-score": 0.9398058252427185,
      "support": 489.0
    },
    "Built surfaces": {
      "precision": 0.39111111111111113,
      "recall": 0.624113475177305,
      "f1-score": 0.4808743169398907,
      "support": 141.0
    },
    "accuracy": 0.9355916030534351,
    "macro avg": {
      "precision": 0.6850157491484754,
      "recall": 0.7063974683768995,
      "f1-score": 0.680955292173912,
      "support": 4192.0
    },
    "weighted avg": {
      "precision": 0.9466571267273521,
      "recall": 0.9355916030534351,
      "f1-score": 0.9394581009867015,
      "support": 4192.0
    }
  },
  "trials": [
    {
      "max_depth": 10,
      "min_samples_leaf": 3,
      "validation_macro_f1": 0.6328
    },
    {
      "max_depth": 14,
      "min_samples_leaf": 3,
      "validation_macro_f1": 0.6592
    },
    {
      "max_depth": 14,
      "min_samples_leaf": 7,
      "validation_macro_f1": 0.6452
    }
  ],
  "feature_names": [
    "Blue",
    "Green",
    "Red",
    "NIR",
    "SWIR 1",
    "SWIR 2",
    "NDVI",
    "NDWI",
    "NDMI",
    "NDBI"
  ],
  "importance": [
    0.04597,
    0.07019,
    0.09247,
    0.12515,
    0.13696,
    0.12754,
    0.12658,
    0.20416,
    0.03918,
    0.03181
  ],
  "caveat": "Held-out agreement with a dated reference map, not independently verified field accuracy. Later years are temporal transfer predictions, not validated rehabilitation outcomes."
}