{
 "ocl_version": "0.1.0",
 "name": "Peachwood Avenue",
 "slug": "peachwood-avenue",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.18127195741431,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 157.0,
   "end_distance_m": 159.0,
   "start_elevation_m": 208.04337790626698,
   "end_elevation_m": 208.58700334541527,
   "min_gradient_pct": -15.893182343586432
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 27.106687575486415,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 158.0,
   "end_distance_m": 161.0,
   "start_elevation_m": 208.31537520100818,
   "end_elevation_m": 209.12857582827277,
   "min_gradient_pct": -15.453396658357596
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 26.952395523419455,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 156.0,
   "end_distance_m": 161.0,
   "start_elevation_m": 207.7809560521018,
   "end_elevation_m": 209.12857582827277,
   "min_gradient_pct": -14.73713308563731
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.796186293506423,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 151.0,
   "end_distance_m": 161.0,
   "start_elevation_m": 206.44895719892213,
   "end_elevation_m": 209.12857582827277,
   "min_gradient_pct": -14.167650928603734
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.874957233286864,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 148.0,
   "end_distance_m": 168.0,
   "start_elevation_m": 205.71217804654464,
   "end_elevation_m": 210.887169493202,
   "min_gradient_pct": -13.177617518019389
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.35476955180559,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 147.0,
   "end_distance_m": 172.0,
   "start_elevation_m": 205.46976360233086,
   "end_elevation_m": 211.80845599028225,
   "min_gradient_pct": -12.333841451969874
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 22.27049289840852,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 126.0,
   "end_distance_m": 176.0,
   "start_elevation_m": 201.4653258198975,
   "end_elevation_m": 212.60057226910175,
   "min_gradient_pct": -7.286321490501393
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.39627773865425,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 115.0,
   "end_distance_m": 215.0,
   "start_elevation_m": 199.75421090952938,
   "end_elevation_m": 217.15048864818363,
   "min_gradient_pct": -1.1846042645512398
  }
 ],
 "shape": {
  "ascent_concentration": 0.521,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 103.0,
  "shape_class": "stepped"
 },
 "length_m": 253.9848504216818,
 "start_elevation_m": 199.3295136785279,
 "end_elevation_m": 221.24498291472108,
 "endpoint_gain_m": 21.91546923619319,
 "overall_gradient_pct": 8.628652141971354,
 "accumulated_ascent_m": 25.667355101061275,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 26.952395523419455,
   "start_distance_m": 156.0,
   "end_distance_m": 161.0,
   "midpoint_distance_m": 158.5,
   "start_elevation_m": 207.7809560521018,
   "end_elevation_m": 209.12857582827277,
   "start_xy": [
    284701.23156692187,
    4499794.0603024885
   ],
   "end_xy": [
    284698.85762280424,
    4499798.4608012475
   ]
  },
  "max_10m": {
   "gradient_pct": 26.796186293506423,
   "start_distance_m": 151.0,
   "end_distance_m": 161.0,
   "midpoint_distance_m": 156.0,
   "start_elevation_m": 206.44895719892213,
   "end_elevation_m": 209.12857582827277,
   "start_xy": [
    284703.6055110395,
    4499789.6598037295
   ],
   "end_xy": [
    284698.85762280424,
    4499798.4608012475
   ]
  },
  "max_20m": {
   "gradient_pct": 25.874957233286864,
   "start_distance_m": 148.0,
   "end_distance_m": 168.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 205.71217804654464,
   "end_elevation_m": 210.887169493202,
   "start_xy": [
    284705.0298775101,
    4499787.0195044745
   ],
   "end_xy": [
    284695.5341010395,
    4499804.62149951
   ]
  },
  "max_25m": {
   "gradient_pct": 25.35476955180559,
   "start_distance_m": 147.0,
   "end_distance_m": 172.0,
   "midpoint_distance_m": 159.5,
   "start_elevation_m": 205.46976360233086,
   "end_elevation_m": 211.80845599028225,
   "start_xy": [
    284705.5046663336,
    4499786.1394047225
   ],
   "end_xy": [
    284693.6349457454,
    4499808.141898517
   ]
  },
  "max_50m": {
   "gradient_pct": 22.27049289840852,
   "start_distance_m": 126.0,
   "end_distance_m": 176.0,
   "midpoint_distance_m": 151.0,
   "start_elevation_m": 201.4653258198975,
   "end_elevation_m": 212.60057226910175,
   "start_xy": [
    284715.5670385204,
    4499767.7081011
   ],
   "end_xy": [
    284691.7357904513,
    4499811.662297524
   ]
  },
  "max_100m": {
   "gradient_pct": 17.39627773865425,
   "start_distance_m": 115.0,
   "end_distance_m": 215.0,
   "midpoint_distance_m": 165.0,
   "start_elevation_m": 199.75421090952938,
   "end_elevation_m": 217.15048864818363,
   "start_xy": [
    284720.99381539907,
    4499758.139919836
   ],
   "end_xy": [
    284673.31704468833,
    4499846.037686356
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -14.73713308563731,
   "start_distance_m": 4.0,
   "end_distance_m": 9.0,
   "midpoint_distance_m": 6.5,
   "start_elevation_m": 199.21545314617677,
   "end_elevation_m": 198.4785964918949,
   "start_xy": [
    284768.17135407554,
    4499657.671410846
   ],
   "end_xy": [
    284766.08304666996,
    4499662.214424402
   ]
  },
  "min_10m": {
   "gradient_pct": -14.167650928603734,
   "start_distance_m": 4.0,
   "end_distance_m": 14.0,
   "midpoint_distance_m": 9.0,
   "start_elevation_m": 199.21545314617677,
   "end_elevation_m": 197.7986880533164,
   "start_xy": [
    284768.17135407554,
    4499657.671410846
   ],
   "end_xy": [
    284763.9947392644,
    4499666.757437959
   ]
  },
  "min_20m": {
   "gradient_pct": -13.177617518019389,
   "start_distance_m": 4.0,
   "end_distance_m": 24.0,
   "midpoint_distance_m": 14.0,
   "start_elevation_m": 199.21545314617677,
   "end_elevation_m": 196.5799296425729,
   "start_xy": [
    284768.17135407554,
    4499657.671410846
   ],
   "end_xy": [
    284759.81812445325,
    4499675.843465074
   ]
  },
  "min_25m": {
   "gradient_pct": -12.333841451969874,
   "start_distance_m": 4.0,
   "end_distance_m": 29.0,
   "midpoint_distance_m": 16.5,
   "start_elevation_m": 199.21545314617677,
   "end_elevation_m": 196.1319927831843,
   "start_xy": [
    284768.17135407554,
    4499657.671410846
   ],
   "end_xy": [
    284757.72981704766,
    4499680.386478631
   ]
  },
  "min_50m": {
   "gradient_pct": -7.286321490501393,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 199.3295136785279,
   "end_elevation_m": 195.6863529332772,
   "start_xy": [
    284769.842,
    4499654.037
   ],
   "end_xy": [
    284748.92774187424,
    4499699.4527404485
   ]
  },
  "min_100m": {
   "gradient_pct": -1.1846042645512398,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 199.3295136785279,
   "end_elevation_m": 198.14490941397665,
   "start_xy": [
    284769.842,
    4499654.037
   ],
   "end_xy": [
    284727.51868186553,
    4499744.637229949
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.18127195741431,
   "start_distance_m": 157.0,
   "end_distance_m": 159.0,
   "midpoint_distance_m": 158.0,
   "start_elevation_m": 208.04337790626698,
   "end_elevation_m": 208.58700334541527,
   "start_xy": [
    284700.75677809835,
    4499794.9404022405
   ],
   "end_xy": [
    284699.80720045127,
    4499796.700601744
   ]
  },
  "max_3m": {
   "gradient_pct": 27.106687575486415,
   "start_distance_m": 158.0,
   "end_distance_m": 161.0,
   "midpoint_distance_m": 159.5,
   "start_elevation_m": 208.31537520100818,
   "end_elevation_m": 209.12857582827277,
   "start_xy": [
    284700.2819892748,
    4499795.8205019925
   ],
   "end_xy": [
    284698.85762280424,
    4499798.4608012475
   ]
  }
 },
 "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": {
  "review": [],
  "extent": [
   "descends_at_start",
   "may_continue_beyond_end"
  ]
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "sample_interval_m": 1.0,
  "interpolation": "bilinear",
  "smoothing": "none",
  "gradient_windows_m": [
   5.0,
   10.0,
   20.0,
   25.0,
   50.0,
   100.0
  ],
  "diagnostic_windows_m": [
   2.0,
   3.0
  ],
  "elevation_crs": "EPSG:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/pa/USGS_one_meter_x28y450_PA_South_Central_B1_2017.tif"
  ],
  "calculated_at": "2026-09-07T12:41:09+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/pennsylvania-2026-09-07-batch-band3.osm.pbf",
  "osm_snapshot": "",
  "run_id": "pa-run4-260907",
  "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, PA_South_Central_B1_2017 (collected 2017)",
  "elevation_tile_ids": [
   "x28y450"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Derry",
  "county": "Pennsylvania"
 },
 "review_flags": [
  {
   "kind": "possible-bridge-or-hollow",
   "span_m": [
    11.0,
    168.0
   ],
   "status": "pending-human-review",
   "noted": "2026-09-21",
   "figure_adjusted": false
  }
 ]
}