{
  "version": 1,
  "split": "test",
  "n_pairs": 4,
  "pairs": [
    {
      "pair_id": "delhi_0024",
      "before_path": "library_sources/2019/sentinel2_delhi_r1231_c10357.tif",
      "after_path": "library_sources/2026/sentinel2_delhi_r1231_c10357.tif",
      "gt_mask": "docs/delhi_eval/labels/delhi_0024.png",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "notes": "Sentinel-2 L2A TCI, 10m GSD \u2014 coarse resolution, NOT reliable for individual building/road detail. Real Delhi coordinates/dates. GT mask still needs hand-labeling. Day 2 review: appears seasonal/crop-texture noise dominated, no clear structural change spotted at thumbnail resolution \u2014 needs a closer manual look before labeling.",
      "change_frac": 0.04346666666666667
    },
    {
      "pair_id": "delhi_0001",
      "before_path": "library_sources/2019/sentinel2_delhi_r4531_c8857.tif",
      "after_path": "library_sources/2026/sentinel2_delhi_r4531_c8857.tif",
      "gt_mask": "docs/delhi_eval/labels/delhi_0001.png",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "notes": "Sentinel-2 L2A TCI, 10m GSD \u2014 coarse resolution, NOT reliable for individual building/road detail. Real Delhi coordinates/dates. GT mask still needs hand-labeling.",
      "change_frac": 0.06331111111111111
    },
    {
      "pair_id": "delhi_0005",
      "before_path": "library_sources/2019/sentinel2_delhi_r4231_c9457.tif",
      "after_path": "library_sources/2026/sentinel2_delhi_r4231_c9457.tif",
      "gt_mask": "docs/delhi_eval/labels/delhi_0005.png",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "notes": "Sentinel-2 L2A TCI, 10m GSD \u2014 coarse resolution, NOT reliable for individual building/road detail. Real Delhi coordinates/dates. GT mask still needs hand-labeling. Day 2 review: real change visually confirmed but automated mask under-captures the extent \u2014 needs manual polygon redraw, not yet promoted.",
      "change_frac": 0.10974444444444445
    },
    {
      "pair_id": "delhi_0016",
      "before_path": "library_sources/2019/sentinel2_delhi_r1831_c9757.tif",
      "after_path": "library_sources/2026/sentinel2_delhi_r1831_c9757.tif",
      "gt_mask": "docs/delhi_eval/labels/delhi_0016.png",
      "change_types": [
        "mixed_gsd",
        "vegetation",
        "road"
      ],
      "notes": "Sentinel-2 L2A TCI, 10m GSD \u2014 coarse resolution, NOT reliable for individual building/road detail. Real Delhi coordinates/dates. GT mask still needs hand-labeling. Visually confirmed real road/highway construction (Day 2 review) \u2014 coarse 10m precision only.",
      "change_frac": 0.07712222222222222
    }
  ]
}