| { |
| "name": "B-Mo iron ore statistical engine", |
| "version": 1, |
| "created_utc": "2026-11-14T18:32:54+00:00", |
| "trained_on_fake_data": false, |
| "training": { |
| "deposits": 975, |
| "background": 1950, |
| "exact_only": false, |
| "imagery_window": [ |
| "2024-01-01", |
| "2025-12-31" |
| ], |
| "buffer_m": 500, |
| "composite": "median; Sentinel-2 SCL-masked; Landsat QA_PIXEL-masked", |
| "background_rule": "25.0-300.0 km from a deposit, on land, 50% on bare/sparse ground" |
| }, |
| "validation": { |
| "engine_model": "Statistical engine (likelihood variant)", |
| "scheme": "spatial CV, 10-degree blocks", |
| "engine_cv_roc_auc": 0.7816005259697567, |
| "engine_deposits_found_at_10pct_false_alarms": 0.4164102564102564, |
| "best_ml_model": "XGBoost", |
| "best_ml_feature_set": "+terrain", |
| "best_ml_cv_roc_auc": 0.8577130834976988 |
| }, |
| "feature_set": "+terrain", |
| "engine_mode": "likelihood", |
| "scoring": { |
| "closeness": { |
| "per_feature": "s = exp(-0.5*((x-mean)/std)^2)", |
| "combine": "weighted average over available features, x100" |
| }, |
| "likelihood": { |
| "per_feature": "llr = clip(log N(x|deposit mean,std) - log N(x|background mean,std), -10, 10)", |
| "combine": "S = sum(llr * weight/max_weight) over available features; score = 100/(1+exp(-S/llr_scale))", |
| "llr_scale": 16.70671964821434 |
| }, |
| "mode_used_below": "likelihood", |
| "class_names": [ |
| "Very low", |
| "Low", |
| "Moderate", |
| "High", |
| "Very high" |
| ], |
| "class_edges_score": [ |
| 49.09511078426455, |
| 56.82105322793868, |
| 58.531284836870356, |
| 59.582799025505466 |
| ], |
| "class_edges_note": "background percentiles 50/75/90/97 of out-of-fold engine scores" |
| }, |
| "features": { |
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| "B4": { |
| "definition": "red", |
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| "B8": { |
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| "B11": { |
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| "B12": { |
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| "ferric_oxide": { |
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| "auc": 0.4651261012491782, |
| "background_mean": 1.7710890561231676, |
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| }, |
| "iron_nd": { |
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| "weight": 0.013171997030420303, |
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| "ferrous_iron": { |
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| "weight": 0.013681561647683646, |
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| "gossan": { |
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| "background_mean": 2.1964458674116774, |
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| "clay": { |
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| "auc": 0.5698703484549639, |
| "background_mean": 1.3268596778439787, |
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| "definition": "mean(B2,B3,B4,B8,B11,B12)", |
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| "ST_p10": { |
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| "ST_p90": { |
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| "lst_range": { |
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| }, |
| "elevation": { |
| "definition": "ALOS AW3D30 DSM (m)", |
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| "std": 613.7099661478763, |
| "weight": 0.014158843906153495, |
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| "slope": { |
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| "weight": 0.08810928482357644, |
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| } |
| } |
| } |
