{
  "example": "two-hole mounting plate",
  "synthetic": true,
  "input_image": "/media/solidworks-two-hole-plate-input.png",
  "units": "mm",
  "coordinate_convention": {
    "origin": "left-front-bottom plate corner",
    "x_axis": "plate length",
    "y_axis": "plate width",
    "z_axis": "plate thickness; holes pass through Z"
  },
  "plate_mm": [80, 40, 10],
  "holes_mm": [
    { "center_xy": [20, 20], "diameter": 8, "type": "through" },
    { "center_xy": [60, 20], "diameter": 8, "type": "through" }
  ],
  "expected_analytic_measurements": {
    "method": "independent closed-form calculation",
    "volume_mm3": 30994.690350851266,
    "surface_area_mm2": 9101.592894744621,
    "centroidal_geometric_inertia_unit_density_mm5": [
      [4520934.514327166, 0, 0],
      [0, 16918810.65466767, 0],
      [0, 0, 20923166.996480647]
    ],
    "inertia_note": "Geometric inertia at unit density; not mass moment of inertia for a specified material."
  },
  "provenance": {
    "drawing": "synthetic dimensioned source image",
    "dimensions": "reviewed interpretation of the synthetic drawing",
    "measurements": "independent analytic reference values",
    "step_reference": "comparison evidence only; not generated by Paramach or SOLIDWORKS and not presented as a product output"
  },
  "review_checks": [
    "Length chain: 20 + 40 + 20 = 80 mm",
    "Right hole center: 20 mm left offset + 40 mm pitch = 60 mm",
    "Both hole centers share the 20 mm width centerline",
    "Hole diameter is 8 mm for both through holes"
  ],
  "human_review_required": true,
  "limitations": [
    "This resource documents a reviewed synthetic example; it does not demonstrate automatic drawing interpretation or CAD construction.",
    "No tolerance, material, density, manufacturing process, or production suitability is specified.",
    "Analytic measurements are expected comparison values, not measured output from a Paramach or SOLIDWORKS model.",
    "The independent STEP reference is comparison evidence only and is not included as a demonstrated product output."
  ]
}