{
  "pairs": [
    {
      "pair_id": "delhi_0001",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r4531_c8857.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r4531_c8857.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.4918N, 76.9419E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0001.png",
      "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."
    },
    {
      "pair_id": "delhi_0002",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r2731_c8557.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r2731_c8557.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6547N, 76.9142E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0002.png",
      "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."
    },
    {
      "pair_id": "delhi_0003",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r4531_c9157.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r4531_c9157.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.4914N, 76.9725E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0003.png",
      "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."
    },
    {
      "pair_id": "delhi_0004",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3931_c9757.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3931_c9757.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.5446N, 77.0348E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0004.png",
      "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."
    },
    {
      "pair_id": "delhi_0005",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r4231_c9457.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r4231_c9457.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.5180N, 77.0036E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0005.png",
      "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."
    },
    {
      "pair_id": "delhi_0006",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1231_c8557.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1231_c8557.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7900N, 76.9166E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0006.png",
      "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."
    },
    {
      "pair_id": "delhi_0007",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3031_c8557.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3031_c8557.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6276N, 76.9137E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0007.png",
      "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."
    },
    {
      "pair_id": "delhi_0008",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3031_c8857.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3031_c8857.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6272N, 76.9443E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0008.png",
      "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."
    },
    {
      "pair_id": "delhi_0009",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1231_c7957.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1231_c7957.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7908N, 76.8552E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0009.png",
      "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. Retried with stronger morphological merge \u2014 still doesn't align with the visible real change, needs manual polygon redraw. Day 3: hand-traced polygon around the color-distinctive bare-earth/staging patch that disappeared \u2014 replaced automated candidate."
    },
    {
      "pair_id": "delhi_0010",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3331_c7957.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3331_c7957.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6014N, 76.8519E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0010.png",
      "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."
    },
    {
      "pair_id": "delhi_0011",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r2731_c8257.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r2731_c8257.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6551N, 76.8835E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0011.png",
      "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."
    },
    {
      "pair_id": "delhi_0012",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r2731_c8857.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r2731_c8857.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6542N, 76.9448E)",
      "change_types": [
        "mixed_gsd",
        "vegetation",
        "road"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0012.png",
      "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."
    },
    {
      "pair_id": "delhi_0013",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3031_c7957.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3031_c7957.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6285N, 76.8523E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0013.png",
      "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."
    },
    {
      "pair_id": "delhi_0014",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1531_c9757.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1531_c9757.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7611N, 77.0390E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0014.png",
      "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: dominant blob sits over open fields, not aligned with the settlement \u2014 likely crop noise, needs closer manual look."
    },
    {
      "pair_id": "delhi_0015",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1231_c8857.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1231_c8857.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7895N, 76.9474E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0015.png",
      "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."
    },
    {
      "pair_id": "delhi_0016",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1831_c9757.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1831_c9757.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7341N, 77.0385E)",
      "change_types": [
        "mixed_gsd",
        "vegetation",
        "road"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0016.png",
      "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."
    },
    {
      "pair_id": "delhi_0017",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1231_c8257.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1231_c8257.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7904N, 76.8859E)",
      "change_types": [
        "mixed_gsd",
        "vegetation",
        "road"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0017.png",
      "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."
    },
    {
      "pair_id": "delhi_0018",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r4531_c8257.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r4531_c8257.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.4927N, 76.8806E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0018.png",
      "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."
    },
    {
      "pair_id": "delhi_0019",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1831_c9457.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1831_c9457.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7345N, 77.0078E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0020",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r2431_c8257.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r2431_c8257.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6822N, 76.8840E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0020.png",
      "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. Retried with stronger morphological merge \u2014 still doesn't align with the visible real change, needs manual polygon redraw. Day 3: hand-drawn rough polygon (per project GT tolerance) bounding the new road-grid/plot development visible in after \u2014 replaced automated candidate which under-captured it."
    },
    {
      "pair_id": "delhi_0021",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1531_c8557.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1531_c8557.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7629N, 76.9161E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0022",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1231_c9457.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1231_c9457.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7886N, 77.0088E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0023",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3931_c9157.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3931_c9157.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.5455N, 76.9735E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0024",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1231_c10357.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1231_c10357.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7872N, 77.1010E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0025",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1531_c8857.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1531_c8857.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7625N, 76.9469E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0026",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r4231_c8557.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r4231_c8557.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.5193N, 76.9117E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0026.png",
      "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."
    },
    {
      "pair_id": "delhi_0027",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1831_c8857.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1831_c8857.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7354N, 76.9464E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0027.png",
      "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."
    },
    {
      "pair_id": "delhi_0028",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r3931_c9457.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r3931_c9457.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.5451N, 77.0042E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0029",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r2731_c9157.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r2731_c9157.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.6538N, 76.9755E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": null,
      "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."
    },
    {
      "pair_id": "delhi_0030",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r1531_c10057.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r1531_c10057.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.7607N, 77.0697E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0030.png",
      "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. Retried with stronger morphological merge \u2014 still doesn't align with the visible real change, needs manual polygon redraw. Day 3: hand-drawn rough polygon bounding the settlement expansion + new construction patch \u2014 replaced automated candidate which under-captured it."
    },
    {
      "pair_id": "delhi_0031",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r4831_c9157.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r4831_c9157.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.4643N, 76.9720E)",
      "change_types": [
        "mixed_gsd",
        "vegetation"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0031.png",
      "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."
    },
    {
      "pair_id": "delhi_0032",
      "before_path": "library_sources\\2019\\sentinel2_delhi_r5131_c9157.tif",
      "after_path": "library_sources\\2026\\sentinel2_delhi_r5131_c9157.tif",
      "date_before": "2019-06-29",
      "date_after": "2026-06-17",
      "gsd": 10.0,
      "zone": "Delhi (28.4373N, 76.9715E)",
      "change_types": [
        "mixed_gsd",
        "vegetation",
        "building"
      ],
      "gt_mask": "docs\\delhi_eval\\labels\\delhi_0032.png",
      "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 new construction (Day 2 review) \u2014 coarse 10m precision only."
    },
    {
      "pair_id": "dda_before5_after5_v2",
      "before_path": "C:/Users/Priyanka/Downloads/before5 (1).tif",
      "after_path": "C:/Users/Priyanka/Downloads/after5 (1).tif",
      "date_before": null,
      "date_after": null,
      "gsd": null,
      "zone": "Delhi drone (verified NCC>=0.73)",
      "change_types": [
        "building",
        "road",
        "vegetation",
        "mixed"
      ],
      "gt_mask": "docs/delhi_eval/labels/dda_before5_after5_v2.png",
      "roi": null,
      "notes": "Labeling pack. Paint docs/delhi_eval/dda_labeling/dda_before5_after5_v2/gt_mask.png then run scripts/ingest_dda_gt_label.py --pair-id dda_before5_after5_v2",
      "label_preview_size": [
        739,
        708
      ]
    },
    {
      "pair_id": "dda_before6_after6_v2",
      "before_path": "C:/Users/Priyanka/Downloads/before6 (1).tif",
      "after_path": "C:/Users/Priyanka/Downloads/after6 (1).tif",
      "date_before": null,
      "date_after": null,
      "gsd": null,
      "zone": "Delhi drone (verified NCC>=0.73)",
      "change_types": [
        "building",
        "road",
        "vegetation",
        "mixed"
      ],
      "gt_mask": "docs/delhi_eval/labels/dda_before6_after6_v2.png",
      "roi": null,
      "notes": "Labeling pack. Paint docs/delhi_eval/dda_labeling/dda_before6_after6_v2/gt_mask.png then run scripts/ingest_dda_gt_label.py --pair-id dda_before6_after6_v2",
      "label_preview_size": [
        1305,
        1024
      ]
    },
    {
      "pair_id": "dda_before1_before",
      "before_path": "C:/Users/Priyanka/data/library_sources/central_delhi/Images/before1.tif",
      "after_path": "C:/Users/Priyanka/data/library_sources/central_delhi/Images/before.tif",
      "date_before": null,
      "date_after": null,
      "gsd": null,
      "zone": "",
      "change_types": [
        "building",
        "road",
        "vegetation",
        "mixed"
      ],
      "gt_mask": null,
      "roi": null,
      "notes": "Labeling pack. Paint docs/delhi_eval/dda_labeling/dda_before1_before/gt_mask.png then run scripts/ingest_dda_gt_label.py --pair-id dda_before1_before",
      "label_preview_size": [
        944,
        620
      ]
    },
    {
      "pair_id": "dda_before3_1_after3_1",
      "before_path": "C:/Users/Priyanka/data/library_sources/central_delhi/Images/before3 (1).tif",
      "after_path": "C:/Users/Priyanka/data/library_sources/central_delhi/Images/after3 (1).tif",
      "date_before": null,
      "date_after": null,
      "gsd": null,
      "zone": "",
      "change_types": [
        "building",
        "road",
        "vegetation",
        "mixed"
      ],
      "gt_mask": null,
      "roi": null,
      "notes": "Labeling pack. Paint docs/delhi_eval/dda_labeling/dda_before3_1_after3_1/gt_mask.png then run scripts/ingest_dda_gt_label.py --pair-id dda_before3_1_after3_1",
      "label_preview_size": [
        844,
        1055
      ]
    }
  ]
}