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 "diagnostic_note": "Windows <=3 m are at raster-noise scale (1-sigma raster noise alone is roughly +/-7 pp at 2 m and +/-5 pp at 3 m on a 1 m DTM). Diagnostic use only: never a headline or ranking value.",
 "quality_summary": {
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 "provenance": {
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  "interpolation": "bilinear",
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  "calculated_at": "2026-09-03T14:46:32+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/discovered-lane-42-5739-72-7956/discovered-lane-42-5739-72-7956.geojson",
  "run_id": "canopy-all-260903",
  "elevation_provider": "USGS 3DEP (The National Map)",
  "elevation_licence": "Public domain \u2014 USGS 3DEP 1 m DEM, courtesy of the U.S. Geological Survey",
  "elevation_dataset": "USGS 3DEP 1 m DEM, MA_Western_B24 (collected 2023-24)",
  "elevation_tile_ids": [
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  "climb_origin": "discovered",
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   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/USGS_LPC_MA_ME_MA_QL1_UTM18_L1_2015_LAS_2018",
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  "door_status": "D16 hold (2026-09-04): steep under cover but the 5 m/10 m windows exceed the plausibility bounds \u2014 clears no door, kept live for Peter's look",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Buckland",
  "county": "Massachusetts"
 }
}