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        }
      ]
    }
  ],
  "historicalPad": {
    "captureDate": "2010-05-02",
    "sourceImage": "downloads/w5c-r7-ground/lc39a-naip-20100502-rgb-4000.jpg",
    "sourceSha256": "5b8606377eeaae0d72ba6e56594c1886f15f857627666e2d7eda23cb7fc7fae4",
    "sourceManifest": "downloads/w5c-r7-ground/manifest.json",
    "sourceBoundsWestSouthEastNorth": [
      -80.62478158847792,
      28.59041741294403,
      -80.58381841152206,
      28.626379509338157
    ],
    "sourceCRS": "EPSG:4326",
    "sourceNativeMetresPerPixel": 1,
    "maskPolygonEastNorthM": [
      [
        -470,
        380
      ],
      [
        -220,
        440
      ],
      [
        160,
        420
      ],
      [
        390,
        310
      ],
      [
        510,
        120
      ],
      [
        520,
        -130
      ],
      [
        340,
        -350
      ],
      [
        160,
        -470
      ],
      [
        -170,
        -450
      ],
      [
        -410,
        -200
      ],
      [
        -490,
        70
      ]
    ],
    "maskAccessCorridorEastNorthBoundsM": [
      -135,
      -730,
      135,
      -320
    ],
    "maskFeatherM": 35,
    "maskFeather": "Approximate 35m inward feather: geographic polygon/corridor raster, Gaussian sigma=35/3m, smoothstep on the inward half, clipped to the original footprint; zero outside.",
    "maskMeaning": "Approximate geographic crop following the perimeter road and southern access; not a cadastral survey and not manual editing of buildings.",
    "naturalWaterControlEastNorthBoundsM": {
      "westernLagoon": [
        -750,
        -350,
        -550,
        50
      ],
      "easternLagoon": [
        550,
        -650,
        750,
        -350
      ],
      "northernLagoon": [
        50,
        480,
        250,
        650
      ],
      "southwestWetland": [
        -600,
        -750,
        -350,
        -500
      ]
    },
    "toneSamplingEllipse": {
      "centreEastNorthM": [
        0,
        -120
      ],
      "radiiEastNorthM": [
        720,
        970
      ],
      "normalizedAnnulus": [
        1.05,
        1.3
      ],
      "purpose": "Statistics only; does not define replacement coverage."
    },
    "registration": "Source and destination geographic bounds only; no fitted positional correction.",
    "scope": "Historical photographic inset in existing local terrain; not an unmodified 2011 survey or a claim that all surrounding imagery is historical."
  }
}
