{
 "ocl_version": "0.1.0",
 "name": "Burch Road",
 "slug": "burch-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 28.820697636038517,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 451.2637393108891,
   "end_elevation_m": 451.84015326360986,
   "min_gradient_pct": 2.0574877975207073
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.543607814283103,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 179.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 451.07384502918137,
   "end_elevation_m": 451.84015326360986,
   "min_gradient_pct": 2.3699280375372687
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.18462363177241,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 177.0,
   "end_distance_m": 182.0,
   "start_elevation_m": 450.63092208202124,
   "end_elevation_m": 451.84015326360986,
   "min_gradient_pct": 5.435486962784353
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.963951486876795,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 190.0,
   "end_distance_m": 200.0,
   "start_elevation_m": 453.518392335123,
   "end_elevation_m": 455.8147874838107,
   "min_gradient_pct": 5.9492447724778685
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.755240864607913,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 180.0,
   "end_distance_m": 200.0,
   "start_elevation_m": 451.2637393108891,
   "end_elevation_m": 455.8147874838107,
   "min_gradient_pct": 7.393103238951824
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 22.462197530992626,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 175.0,
   "end_distance_m": 200.0,
   "start_elevation_m": 450.1992381010625,
   "end_elevation_m": 455.8147874838107,
   "min_gradient_pct": 7.932019974228069
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.271753862973696,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 162.0,
   "end_distance_m": 212.0,
   "start_elevation_m": 447.65420978871435,
   "end_elevation_m": 458.2900867202012,
   "min_gradient_pct": 10.048659148363072
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.115687211843465,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 145.0,
   "end_distance_m": 245.0,
   "start_elevation_m": 444.7003222889717,
   "end_elevation_m": 463.81600950081514,
   "min_gradient_pct": 11.670781171937335
  }
 ],
 "shape": {
  "ascent_concentration": 0.319,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 307.0,
  "shape_class": "sustained"
 },
 "length_m": 324.6582032102323,
 "start_elevation_m": 426.4543070341651,
 "end_elevation_m": 476.7127795068143,
 "endpoint_gain_m": 50.2584724726492,
 "overall_gradient_pct": 15.480425868094992,
 "accumulated_ascent_m": 50.2584724726492,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.18462363177241,
   "start_distance_m": 177.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 179.5,
   "start_elevation_m": 450.63092208202124,
   "end_elevation_m": 451.84015326360986,
   "start_xy": [
    665920.7115929201,
    4655741.411312742
   ],
   "end_xy": [
    665921.0522972568,
    4655746.399691292
   ]
  },
  "max_10m": {
   "gradient_pct": 22.963951486876795,
   "start_distance_m": 190.0,
   "end_distance_m": 200.0,
   "midpoint_distance_m": 195.0,
   "start_elevation_m": 453.518392335123,
   "end_elevation_m": 455.8147874838107,
   "start_xy": [
    665921.5974241955,
    4655754.381096971
   ],
   "end_xy": [
    665922.0651416801,
    4655764.366826423
   ]
  },
  "max_20m": {
   "gradient_pct": 22.755240864607913,
   "start_distance_m": 180.0,
   "end_distance_m": 200.0,
   "midpoint_distance_m": 190.0,
   "start_elevation_m": 451.2637393108891,
   "end_elevation_m": 455.8147874838107,
   "start_xy": [
    665920.9160155221,
    4655744.404339871
   ],
   "end_xy": [
    665922.0651416801,
    4655764.366826423
   ]
  },
  "max_25m": {
   "gradient_pct": 22.462197530992626,
   "start_distance_m": 175.0,
   "end_distance_m": 200.0,
   "midpoint_distance_m": 187.5,
   "start_elevation_m": 450.1992381010625,
   "end_elevation_m": 455.8147874838107,
   "start_xy": [
    665920.5753111854,
    4655739.415961322
   ],
   "end_xy": [
    665922.0651416801,
    4655764.366826423
   ]
  },
  "max_50m": {
   "gradient_pct": 21.271753862973696,
   "start_distance_m": 162.0,
   "end_distance_m": 212.0,
   "midpoint_distance_m": 187.0,
   "start_elevation_m": 447.65420978871435,
   "end_elevation_m": 458.2900867202012,
   "start_xy": [
    665919.6894799102,
    4655726.446177093
   ],
   "end_xy": [
    665922.2539171721,
    4655776.36534149
   ]
  },
  "max_100m": {
   "gradient_pct": 19.115687211843465,
   "start_distance_m": 145.0,
   "end_distance_m": 245.0,
   "midpoint_distance_m": 195.0,
   "start_elevation_m": 444.7003222889717,
   "end_elevation_m": 463.81600950081514,
   "start_xy": [
    665918.6367050575,
    4655709.480367755
   ],
   "end_xy": [
    665922.7730497752,
    4655809.361257925
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 5.435486962784353,
   "start_distance_m": 2.0,
   "end_distance_m": 7.0,
   "midpoint_distance_m": 4.5,
   "start_elevation_m": 426.58059977425535,
   "end_elevation_m": 426.85237412239456,
   "start_xy": [
    665904.6371129954,
    4655568.9659656305
   ],
   "end_xy": [
    665907.062395484,
    4655573.338379706
   ]
  },
  "min_10m": {
   "gradient_pct": 5.9492447724778685,
   "start_distance_m": 0.0,
   "end_distance_m": 10.0,
   "midpoint_distance_m": 5.0,
   "start_elevation_m": 426.4543070341651,
   "end_elevation_m": 427.04923151141287,
   "start_xy": [
    665903.667,
    4655567.217
   ],
   "end_xy": [
    665908.517564977,
    4655575.961828152
   ]
  },
  "min_20m": {
   "gradient_pct": 7.393103238951824,
   "start_distance_m": 0.0,
   "end_distance_m": 20.0,
   "midpoint_distance_m": 10.0,
   "start_elevation_m": 426.4543070341651,
   "end_elevation_m": 427.93292768195545,
   "start_xy": [
    665903.667,
    4655567.217
   ],
   "end_xy": [
    665912.8005897168,
    4655584.962830207
   ]
  },
  "min_25m": {
   "gradient_pct": 7.932019974228069,
   "start_distance_m": 0.0,
   "end_distance_m": 25.0,
   "midpoint_distance_m": 12.5,
   "start_elevation_m": 426.4543070341651,
   "end_elevation_m": 428.4373120277221,
   "start_xy": [
    665903.667,
    4655567.217
   ],
   "end_xy": [
    665914.4754098969,
    4655589.673984775
   ]
  },
  "min_50m": {
   "gradient_pct": 10.048659148363072,
   "start_distance_m": 0.0,
   "end_distance_m": 50.0,
   "midpoint_distance_m": 25.0,
   "start_elevation_m": 426.4543070341651,
   "end_elevation_m": 431.4786366083466,
   "start_xy": [
    665903.667,
    4655567.217
   ],
   "end_xy": [
    665916.9395274179,
    4655614.530098441
   ]
  },
  "min_100m": {
   "gradient_pct": 11.670781171937335,
   "start_distance_m": 0.0,
   "end_distance_m": 100.0,
   "midpoint_distance_m": 50.0,
   "start_elevation_m": 426.4543070341651,
   "end_elevation_m": 438.1250882061024,
   "start_xy": [
    665903.667,
    4655567.217
   ],
   "end_xy": [
    665917.1968411925,
    4655664.503844822
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 28.820697636038517,
   "start_distance_m": 180.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 181.0,
   "start_elevation_m": 451.2637393108891,
   "end_elevation_m": 451.84015326360986,
   "start_xy": [
    665920.9160155221,
    4655744.404339871
   ],
   "end_xy": [
    665921.0522972568,
    4655746.399691292
   ]
  },
  "max_3m": {
   "gradient_pct": 25.543607814283103,
   "start_distance_m": 179.0,
   "end_distance_m": 182.0,
   "midpoint_distance_m": 180.5,
   "start_elevation_m": 451.07384502918137,
   "end_elevation_m": 451.84015326360986,
   "start_xy": [
    665920.8478746548,
    4655743.406664162
   ],
   "end_xy": [
    665921.0522972568,
    4655746.399691292
   ]
  }
 },
 "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": [
   "may_start_earlier",
   "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:26917",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/ny-west/USGS_one_meter_x66y466_NY_Southwest_East_2017.tif"
  ],
  "calculated_at": "2026-09-06T10:28:22+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-york-2026-09-06-batch.osm.pbf",
  "osm_snapshot": "2026-09-04T20:21:21Z",
  "run_id": "ny-run3-260906",
  "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, NY_Southwest_East_2017 (collected 2017)",
  "elevation_tile_ids": [
   "x66y466"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: NY_FEMAR2_Central_B1_2018: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "South Valley",
  "county": "New York"
 }
}