{
 "ocl_version": "0.1.0",
 "name": "Terrace Road",
 "slug": "terrace-road-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 25.296778578028523,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 832.0,
   "end_distance_m": 834.0,
   "start_elevation_m": 164.49076899459473,
   "end_elevation_m": 164.9967045661553,
   "min_gradient_pct": -24.062023926302345
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 24.857108916113663,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 832.0,
   "end_distance_m": 835.0,
   "start_elevation_m": 164.49076899459473,
   "end_elevation_m": 165.23648226207814,
   "min_gradient_pct": -22.034933415584607
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 24.37198984622796,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 830.0,
   "end_distance_m": 835.0,
   "start_elevation_m": 164.01788276976674,
   "end_elevation_m": 165.23648226207814,
   "min_gradient_pct": -20.94976387046472
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.227892591462762,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 830.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 164.01788276976674,
   "end_elevation_m": 166.34067202891302,
   "min_gradient_pct": -20.195712189540416
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.139181804513214,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 820.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 162.11283566801038,
   "end_elevation_m": 166.34067202891302,
   "min_gradient_pct": -19.900566309447072
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.421885467297216,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 815.0,
   "end_distance_m": 840.0,
   "start_elevation_m": 161.23520066208872,
   "end_elevation_m": 166.34067202891302,
   "min_gradient_pct": -19.4944208477134
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.46438243466048,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 802.0,
   "end_distance_m": 852.0,
   "start_elevation_m": 159.6472097004367,
   "end_elevation_m": 167.87940091776693,
   "min_gradient_pct": -15.86990721701818
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 14.037586737226832,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 11.0,
   "end_distance_m": 111.0,
   "start_elevation_m": 142.5882628883482,
   "end_elevation_m": 156.62584962557503,
   "min_gradient_pct": -9.238887581727994
  }
 ],
 "shape": {
  "ascent_concentration": 0.492,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 97.0,
  "shape_class": "stepped"
 },
 "length_m": 941.5610299663387,
 "start_elevation_m": 142.29259298340764,
 "end_elevation_m": 168.73851020604187,
 "endpoint_gain_m": 26.445917222634222,
 "overall_gradient_pct": 2.8087310732879076,
 "accumulated_ascent_m": 44.835581010096746,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 24.37198984622796,
   "start_distance_m": 830.0,
   "end_distance_m": 835.0,
   "midpoint_distance_m": 832.5,
   "start_elevation_m": 164.01788276976674,
   "end_elevation_m": 165.23648226207814,
   "start_xy": [
    620152.411314104,
    4840074.863796625
   ],
   "end_xy": [
    620150.1846915303,
    4840079.304169189
   ]
  },
  "max_10m": {
   "gradient_pct": 23.227892591462762,
   "start_distance_m": 830.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 835.0,
   "start_elevation_m": 164.01788276976674,
   "end_elevation_m": 166.34067202891302,
   "start_xy": [
    620152.411314104,
    4840074.863796625
   ],
   "end_xy": [
    620147.6138940229,
    4840083.592642131
   ]
  },
  "max_20m": {
   "gradient_pct": 21.139181804513214,
   "start_distance_m": 820.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 830.0,
   "start_elevation_m": 162.11283566801038,
   "end_elevation_m": 166.34067202891302,
   "start_xy": [
    620155.2826935825,
    4840065.284904211
   ],
   "end_xy": [
    620147.6138940229,
    4840083.592642131
   ]
  },
  "max_25m": {
   "gradient_pct": 20.421885467297216,
   "start_distance_m": 815.0,
   "end_distance_m": 840.0,
   "midpoint_distance_m": 827.5,
   "start_elevation_m": 161.23520066208872,
   "end_elevation_m": 166.34067202891302,
   "start_xy": [
    620156.7183833218,
    4840060.495458003
   ],
   "end_xy": [
    620147.6138940229,
    4840083.592642131
   ]
  },
  "max_50m": {
   "gradient_pct": 16.46438243466048,
   "start_distance_m": 802.0,
   "end_distance_m": 852.0,
   "midpoint_distance_m": 827.0,
   "start_elevation_m": 159.6472097004367,
   "end_elevation_m": 167.87940091776693,
   "start_xy": [
    620160.4511766438,
    4840048.042897864
   ],
   "end_xy": [
    620141.360218592,
    4840093.815865551
   ]
  },
  "max_100m": {
   "gradient_pct": 14.037586737226832,
   "start_distance_m": 11.0,
   "end_distance_m": 111.0,
   "midpoint_distance_m": 61.0,
   "start_elevation_m": 142.5882628883482,
   "end_elevation_m": 156.62584962557503,
   "start_xy": [
    620252.9792908985,
    4839370.2138618
   ],
   "end_xy": [
    620216.4622136925,
    4839458.806828923
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -20.94976387046472,
   "start_distance_m": 648.0,
   "end_distance_m": 653.0,
   "midpoint_distance_m": 650.5,
   "start_elevation_m": 159.66096702419213,
   "end_elevation_m": 158.6134788306689,
   "start_xy": [
    620152.2137836852,
    4839910.889494392
   ],
   "end_xy": [
    620156.5018787289,
    4839913.460922186
   ]
  },
  "min_10m": {
   "gradient_pct": -20.195712189540416,
   "start_distance_m": 644.0,
   "end_distance_m": 654.0,
   "midpoint_distance_m": 649.0,
   "start_elevation_m": 160.43460563030476,
   "end_elevation_m": 158.41503441135072,
   "start_xy": [
    620148.7833076504,
    4839908.832352158
   ],
   "end_xy": [
    620157.3594977376,
    4839913.975207744
   ]
  },
  "min_20m": {
   "gradient_pct": -19.900566309447072,
   "start_distance_m": 639.0,
   "end_distance_m": 659.0,
   "midpoint_distance_m": 649.0,
   "start_elevation_m": 161.37659018300826,
   "end_elevation_m": 157.39647692111885,
   "start_xy": [
    620145.644347001,
    4839904.949526813
   ],
   "end_xy": [
    620161.6475927812,
    4839916.546635538
   ]
  },
  "min_25m": {
   "gradient_pct": -19.4944208477134,
   "start_distance_m": 637.0,
   "end_distance_m": 662.0,
   "midpoint_distance_m": 649.5,
   "start_elevation_m": 161.73184934343286,
   "end_elevation_m": 156.8582441315045,
   "start_xy": [
    620144.3994356347,
    4839903.384216719
   ],
   "end_xy": [
    620164.2204498074,
    4839918.089492214
   ]
  },
  "min_50m": {
   "gradient_pct": -15.86990721701818,
   "start_distance_m": 625.0,
   "end_distance_m": 675.0,
   "midpoint_distance_m": 650.0,
   "start_elevation_m": 163.2943406854596,
   "end_elevation_m": 155.3593870769505,
   "start_xy": [
    620139.8576198529,
    4839892.881018491
   ],
   "end_xy": [
    620173.0494991236,
    4839926.970250344
   ]
  },
  "min_100m": {
   "gradient_pct": -9.238887581727994,
   "start_distance_m": 597.0,
   "end_distance_m": 697.0,
   "midpoint_distance_m": 647.0,
   "start_elevation_m": 164.0356049947755,
   "end_elevation_m": 154.7967174130475,
   "start_xy": [
    620138.3542134686,
    4839864.921408887
   ],
   "end_xy": [
    620181.3906356468,
    4839947.061798736
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 25.296778578028523,
   "start_distance_m": 832.0,
   "end_distance_m": 834.0,
   "midpoint_distance_m": 833.0,
   "start_elevation_m": 164.49076899459473,
   "end_elevation_m": 164.9967045661553,
   "start_xy": [
    620151.7271700348,
    4840076.731085423
   ],
   "end_xy": [
    620150.6988510318,
    4840078.446474601
   ]
  },
  "max_3m": {
   "gradient_pct": 24.857108916113663,
   "start_distance_m": 832.0,
   "end_distance_m": 835.0,
   "midpoint_distance_m": 833.5,
   "start_elevation_m": 164.49076899459473,
   "end_elevation_m": 165.23648226207814,
   "start_xy": [
    620151.7271700348,
    4840076.731085423
   ],
   "end_xy": [
    620150.1846915303,
    4840079.304169189
   ]
  }
 },
 "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"
  ]
 },
 "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/ny/USGS_1M_18_x62y484_NY_NH_Gaps_D24.tif",
   "data/cache/usa/ny/USGS_1M_18_x62y485_NY_NH_Gaps_D24.tif"
  ],
  "calculated_at": "2026-09-06T11:03:11+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-band3.osm.pbf",
  "osm_snapshot": "",
  "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_NH_Gaps_D24 (collected 2024)",
  "elevation_tile_ids": [
   "x62y484",
   "x62y485"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: USGS_LPC_VT_Rutland_Lot8_2013_LAS_2016: no corridor points fetched; NY_HudsonRiverRegion_1_2020: no corridor points fetched; NY_Hudson_1_D22: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Hague",
  "county": "New York"
 }
}