{
 "ocl_version": "0.1.0",
 "name": "Littlefield Road",
 "slug": "littlefield-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 42.34280263645758,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1069.0,
   "end_distance_m": 1071.0,
   "start_elevation_m": 274.5661786597898,
   "end_elevation_m": 275.41303471251894,
   "min_gradient_pct": -28.289924185125415
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 38.567252529537654,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 1064.0,
   "end_distance_m": 1067.0,
   "start_elevation_m": 272.8479033117299,
   "end_elevation_m": 274.00492088761604,
   "min_gradient_pct": -24.694546208549657
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 38.2711306934857,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1062.0,
   "end_distance_m": 1067.0,
   "start_elevation_m": 272.09136435294175,
   "end_elevation_m": 274.00492088761604,
   "min_gradient_pct": -22.446333663961013
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 36.461260719578945,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1061.0,
   "end_distance_m": 1071.0,
   "start_elevation_m": 271.76690864056104,
   "end_elevation_m": 275.41303471251894,
   "min_gradient_pct": -18.313679226346835
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 31.54480367068885,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1051.0,
   "end_distance_m": 1071.0,
   "start_elevation_m": 269.10407397838117,
   "end_elevation_m": 275.41303471251894,
   "min_gradient_pct": -17.028449713271243
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 30.088832764760355,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1047.0,
   "end_distance_m": 1072.0,
   "start_elevation_m": 268.13664795459545,
   "end_elevation_m": 275.65885614578553,
   "min_gradient_pct": -16.899242093335488
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.903050074934868,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 1023.0,
   "end_distance_m": 1073.0,
   "start_elevation_m": 263.8660250454199,
   "end_elevation_m": 275.81755008288735,
   "min_gradient_pct": -10.552797812010567
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 22.118974692022817,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 971.0,
   "end_distance_m": 1071.0,
   "start_elevation_m": 253.29406002049612,
   "end_elevation_m": 275.41303471251894,
   "min_gradient_pct": -3.888019494002833
  }
 ],
 "shape": {
  "ascent_concentration": 0.495,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 114.0,
  "shape_class": "stepped"
 },
 "length_m": 1300.6769814370612,
 "start_elevation_m": 196.22776864563212,
 "end_elevation_m": 276.1965061883501,
 "endpoint_gain_m": 79.96873754271797,
 "overall_gradient_pct": 6.148239623212522,
 "accumulated_ascent_m": 90.96871411455376,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 38.2711306934857,
   "start_distance_m": 1062.0,
   "end_distance_m": 1067.0,
   "midpoint_distance_m": 1064.5,
   "start_elevation_m": 272.09136435294175,
   "end_elevation_m": 274.00492088761604,
   "start_xy": [
    352542.85728688067,
    4901707.770790901
   ],
   "end_xy": [
    352546.4043015595,
    4901704.246776305
   ]
  },
  "max_10m": {
   "gradient_pct": 36.461260719578945,
   "start_distance_m": 1061.0,
   "end_distance_m": 1071.0,
   "midpoint_distance_m": 1066.0,
   "start_elevation_m": 271.76690864056104,
   "end_elevation_m": 275.41303471251894,
   "start_xy": [
    352542.1479438979,
    4901708.475654298
   ],
   "end_xy": [
    352549.24197363085,
    4901701.427624775
   ]
  },
  "max_20m": {
   "gradient_pct": 31.54480367068885,
   "start_distance_m": 1051.0,
   "end_distance_m": 1071.0,
   "midpoint_distance_m": 1061.0,
   "start_elevation_m": 269.10407397838117,
   "end_elevation_m": 275.41303471251894,
   "start_xy": [
    352535.0539138096,
    4901715.523684175
   ],
   "end_xy": [
    352549.24197363085,
    4901701.427624775
   ]
  },
  "max_25m": {
   "gradient_pct": 30.088832764760355,
   "start_distance_m": 1047.0,
   "end_distance_m": 1072.0,
   "midpoint_distance_m": 1059.5,
   "start_elevation_m": 268.13664795459545,
   "end_elevation_m": 275.65885614578553,
   "start_xy": [
    352532.2165015574,
    4901718.343097184
   ],
   "end_xy": [
    352549.95131659287,
    4901700.722761356
   ]
  },
  "max_50m": {
   "gradient_pct": 23.903050074934868,
   "start_distance_m": 1023.0,
   "end_distance_m": 1073.0,
   "midpoint_distance_m": 1048.0,
   "start_elevation_m": 263.8660250454199,
   "end_elevation_m": 275.81755008288735,
   "start_xy": [
    352515.1912683765,
    4901735.258809301
   ],
   "end_xy": [
    352550.6604208388,
    4901700.017657699
   ]
  },
  "max_100m": {
   "gradient_pct": 22.118974692022817,
   "start_distance_m": 971.0,
   "end_distance_m": 1071.0,
   "midpoint_distance_m": 1021.0,
   "start_elevation_m": 253.29406002049612,
   "end_elevation_m": 275.41303471251894,
   "start_xy": [
    352474.16664300923,
    4901766.902519354
   ],
   "end_xy": [
    352549.24197363085,
    4901701.427624775
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -22.446333663961013,
   "start_distance_m": 1178.0,
   "end_distance_m": 1183.0,
   "midpoint_distance_m": 1180.5,
   "start_elevation_m": 273.65469138184636,
   "end_elevation_m": 272.5323746986483,
   "start_xy": [
    352574.467500997,
    4901609.085123198
   ],
   "end_xy": [
    352573.73493905365,
    4901604.139079755
   ]
  },
  "min_10m": {
   "gradient_pct": -18.313679226346835,
   "start_distance_m": 1158.0,
   "end_distance_m": 1168.0,
   "midpoint_distance_m": 1163.0,
   "start_elevation_m": 276.7571852219822,
   "end_elevation_m": 274.9258172993475,
   "start_xy": [
    352577.3978211657,
    4901628.869286617
   ],
   "end_xy": [
    352575.93289499014,
    4901618.977170342
   ]
  },
  "min_20m": {
   "gradient_pct": -17.028449713271243,
   "start_distance_m": 1156.0,
   "end_distance_m": 1176.0,
   "midpoint_distance_m": 1166.0,
   "start_elevation_m": 277.00897515703497,
   "end_elevation_m": 273.6032852143807,
   "start_xy": [
    352577.6908824066,
    4901630.84769864
   ],
   "end_xy": [
    352574.7604732649,
    4901611.063548349
   ]
  },
  "min_25m": {
   "gradient_pct": -16.899242093335488,
   "start_distance_m": 1158.0,
   "end_distance_m": 1183.0,
   "midpoint_distance_m": 1170.5,
   "start_elevation_m": 276.7571852219822,
   "end_elevation_m": 272.5323746986483,
   "start_xy": [
    352577.3978211657,
    4901628.869286617
   ],
   "end_xy": [
    352573.73493905365,
    4901604.139079755
   ]
  },
  "min_50m": {
   "gradient_pct": -10.552797812010567,
   "start_distance_m": 1151.0,
   "end_distance_m": 1201.0,
   "midpoint_distance_m": 1176.0,
   "start_elevation_m": 277.27859065031384,
   "end_elevation_m": 272.00219174430856,
   "start_xy": [
    352578.42350065964,
    4901635.793733921
   ],
   "end_xy": [
    352571.0978241781,
    4901586.333306885
   ]
  },
  "min_100m": {
   "gradient_pct": -3.888019494002833,
   "start_distance_m": 1117.0,
   "end_distance_m": 1217.0,
   "midpoint_distance_m": 1167.0,
   "start_elevation_m": 276.42498350035635,
   "end_elevation_m": 272.5369640063535,
   "start_xy": [
    352581.8734536677,
    4901669.005625056
   ],
   "end_xy": [
    352570.5712113788,
    4901570.419491999
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 42.34280263645758,
   "start_distance_m": 1069.0,
   "end_distance_m": 1071.0,
   "midpoint_distance_m": 1070.0,
   "start_elevation_m": 274.5661786597898,
   "end_elevation_m": 275.41303471251894,
   "start_xy": [
    352547.8232683503,
    4901702.837332131
   ],
   "end_xy": [
    352549.24197363085,
    4901701.427624775
   ]
  },
  "max_3m": {
   "gradient_pct": 38.567252529537654,
   "start_distance_m": 1064.0,
   "end_distance_m": 1067.0,
   "midpoint_distance_m": 1065.5,
   "start_elevation_m": 272.8479033117299,
   "end_elevation_m": 274.00492088761604,
   "start_xy": [
    352544.27649182663,
    4901706.361587112
   ],
   "end_xy": [
    352546.4043015595,
    4901704.246776305
   ]
  }
 },
 "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_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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x35y491_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-09-03T18:38:47+00:00",
  "road_source": "/mnt/HC_Volume_106727764/site-corpus-fresh/us/littlefield-road/littlefield-road.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, ME_WesternMtns_B24 (collected 2024)",
  "elevation_tile_ids": [
   "x35y491"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: NH_Umbagog_2016: EPT covers only 77% of stations; USGS_LPC_ME_NRCS_Lot4_2013_LAS_2015: no corridor points fetched; ME_SouthCentral_1_B22: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Stoneham",
  "county": "Maine"
 }
}