{
 "ocl_version": "0.1.0",
 "name": "Deer Mountain Stream Road",
 "slug": "deer-mountain-stream-road",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 27.155252578603495,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 7013.0,
   "end_distance_m": 7015.0,
   "start_elevation_m": 680.5597258683827,
   "end_elevation_m": 681.1028309199547,
   "min_gradient_pct": -58.32939866685933,
   "suppressed_max_gradient_pct": 66.71798616426372,
   "suppressed_location_m": [
    2368.0,
    2370.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.848784094402316,
   "diagnostic": true,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 7013.0,
   "end_distance_m": 7016.0,
   "start_elevation_m": 680.5597258683827,
   "end_elevation_m": 681.3351893912147,
   "min_gradient_pct": -57.7594614283934,
   "suppressed_max_gradient_pct": 64.90924851831512,
   "suppressed_location_m": [
    2366.0,
    2369.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.802227693548048,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 7013.0,
   "end_distance_m": 7018.0,
   "start_elevation_m": 680.5597258683827,
   "end_elevation_m": 681.8498372530601,
   "min_gradient_pct": -55.581199861640016,
   "suppressed_max_gradient_pct": 60.32552273651163,
   "suppressed_location_m": [
    2365.0,
    2370.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.82780799191346,
   "diagnostic": false,
   "flags": [
    "structure_excluded"
   ],
   "start_distance_m": 7005.0,
   "end_distance_m": 7015.0,
   "start_elevation_m": 678.6200501207634,
   "end_elevation_m": 681.1028309199547,
   "min_gradient_pct": -31.737337674338733,
   "suppressed_max_gradient_pct": 33.33378609302713,
   "suppressed_location_m": [
    2365.0,
    2375.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.481836311817915,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 7001.0,
   "end_distance_m": 7021.0,
   "start_elevation_m": 677.6401400612567,
   "end_elevation_m": 682.5365073236203,
   "min_gradient_pct": -14.988735494820276
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 24.25320362128423,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6996.0,
   "end_distance_m": 7021.0,
   "start_elevation_m": 676.4732064182992,
   "end_elevation_m": 682.5365073236203,
   "min_gradient_pct": -11.404509425294691
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.16783922598279,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6978.0,
   "end_distance_m": 7028.0,
   "start_elevation_m": 673.2684675728171,
   "end_elevation_m": 683.8523871858085,
   "min_gradient_pct": -8.08998386202586
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 16.708228153579284,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 6951.0,
   "end_distance_m": 7051.0,
   "start_elevation_m": 669.7817232545649,
   "end_elevation_m": 686.4899514081442,
   "min_gradient_pct": -6.179264110492113
  }
 ],
 "shape": {
  "ascent_concentration": 0.568,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 253.0,
  "shape_class": "stepped"
 },
 "length_m": 7076.384809542902,
 "start_elevation_m": 528.5512906885045,
 "end_elevation_m": 688.9102917769625,
 "endpoint_gain_m": 160.35900108845794,
 "overall_gradient_pct": 2.26611476628864,
 "accumulated_ascent_m": 242.4479280393253,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.802227693548048,
   "start_distance_m": 7013.0,
   "end_distance_m": 7018.0,
   "midpoint_distance_m": 7015.5,
   "start_elevation_m": 680.5597258683827,
   "end_elevation_m": 681.8498372530601,
   "start_xy": [
    348226.5727036838,
    4981062.721387196
   ],
   "end_xy": [
    348227.3771069445,
    4981067.655604441
   ]
  },
  "max_10m": {
   "gradient_pct": 24.82780799191346,
   "start_distance_m": 7005.0,
   "end_distance_m": 7015.0,
   "midpoint_distance_m": 7010.0,
   "start_elevation_m": 678.6200501207634,
   "end_elevation_m": 681.1028309199547,
   "start_xy": [
    348225.4693096199,
    4981054.799497863
   ],
   "end_xy": [
    348226.8827129526,
    4981064.697214682
   ]
  },
  "max_20m": {
   "gradient_pct": 24.481836311817915,
   "start_distance_m": 7001.0,
   "end_distance_m": 7021.0,
   "midpoint_distance_m": 7011.0,
   "start_elevation_m": 677.6401400612567,
   "end_elevation_m": 682.5365073236203,
   "start_xy": [
    348225.01171003084,
    4981050.825758741
   ],
   "end_xy": [
    348227.9869559279,
    4981070.592964517
   ]
  },
  "max_25m": {
   "gradient_pct": 24.25320362128423,
   "start_distance_m": 6996.0,
   "end_distance_m": 7021.0,
   "midpoint_distance_m": 7008.5,
   "start_elevation_m": 676.4732064182992,
   "end_elevation_m": 682.5365073236203,
   "start_xy": [
    348224.43971054454,
    4981045.858584837
   ],
   "end_xy": [
    348227.9869559279,
    4981070.592964517
   ]
  },
  "max_50m": {
   "gradient_pct": 21.16783922598279,
   "start_distance_m": 6978.0,
   "end_distance_m": 7028.0,
   "midpoint_distance_m": 7003.0,
   "start_elevation_m": 673.2684675728171,
   "end_elevation_m": 683.8523871858085,
   "start_xy": [
    348227.19959714083,
    4981028.315161246
   ],
   "end_xy": [
    348229.40993688925,
    4981077.446804695
   ]
  },
  "max_100m": {
   "gradient_pct": 16.708228153579284,
   "start_distance_m": 6951.0,
   "end_distance_m": 7051.0,
   "midpoint_distance_m": 7001.0,
   "start_elevation_m": 669.7817232545649,
   "end_elevation_m": 686.4899514081442,
   "start_xy": [
    348248.3703682089,
    4981012.583096008
   ],
   "end_xy": [
    348236.07868085866,
    4981099.390886552
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -55.581199861640016,
   "start_distance_m": 2358.0,
   "end_distance_m": 2363.0,
   "midpoint_distance_m": 2360.5,
   "start_elevation_m": 513.6890729414416,
   "end_elevation_m": 510.9100129483596,
   "start_xy": [
    350390.6631123933,
    4980488.257401195
   ],
   "end_xy": [
    350385.71196773753,
    4980487.560144716
   ]
  },
  "min_10m": {
   "gradient_pct": -31.737337674338733,
   "start_distance_m": 2355.0,
   "end_distance_m": 2365.0,
   "midpoint_distance_m": 2360.0,
   "start_elevation_m": 513.7328389095001,
   "end_elevation_m": 510.5591051420662,
   "start_xy": [
    350393.633626574,
    4980488.676888593
   ],
   "end_xy": [
    350383.7315098752,
    4980487.281242124
   ]
  },
  "min_20m": {
   "gradient_pct": -14.988735494820276,
   "start_distance_m": 2345.0,
   "end_distance_m": 2365.0,
   "midpoint_distance_m": 2355.0,
   "start_elevation_m": 513.5568522410302,
   "end_elevation_m": 510.5591051420662,
   "start_xy": [
    350403.50215417845,
    4980490.293107303
   ],
   "end_xy": [
    350383.7315098752,
    4980487.281242124
   ]
  },
  "min_25m": {
   "gradient_pct": -11.404509425294691,
   "start_distance_m": 2340.0,
   "end_distance_m": 2365.0,
   "midpoint_distance_m": 2352.5,
   "start_elevation_m": 513.4102324983899,
   "end_elevation_m": 510.5591051420662,
   "start_xy": [
    350408.43641798064,
    4980491.101216658
   ],
   "end_xy": [
    350383.7315098752,
    4980487.281242124
   ]
  },
  "min_50m": {
   "gradient_pct": -8.08998386202586,
   "start_distance_m": 2224.0,
   "end_distance_m": 2274.0,
   "midpoint_distance_m": 2249.0,
   "start_elevation_m": 515.7435990068315,
   "end_elevation_m": 511.69860707581853,
   "start_xy": [
    350521.66045371775,
    4980468.519580564
   ],
   "end_xy": [
    350473.23968157545,
    4980480.970350474
   ]
  },
  "min_100m": {
   "gradient_pct": -6.179264110492113,
   "start_distance_m": 4142.0,
   "end_distance_m": 4242.0,
   "midpoint_distance_m": 4192.0,
   "start_elevation_m": 519.7290001566216,
   "end_elevation_m": 513.5497360461295,
   "start_xy": [
    349477.5520434228,
    4979423.653484311
   ],
   "end_xy": [
    349379.84700789454,
    4979443.345566947
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 27.155252578603495,
   "start_distance_m": 7013.0,
   "end_distance_m": 7015.0,
   "midpoint_distance_m": 7014.0,
   "start_elevation_m": 680.5597258683827,
   "end_elevation_m": 681.1028309199547,
   "start_xy": [
    348226.5727036838,
    4981062.721387196
   ],
   "end_xy": [
    348226.8827129526,
    4981064.697214682
   ]
  },
  "max_3m": {
   "gradient_pct": 25.848784094402316,
   "start_distance_m": 7013.0,
   "end_distance_m": 7016.0,
   "midpoint_distance_m": 7014.5,
   "start_elevation_m": 680.5597258683827,
   "end_elevation_m": 681.3351893912147,
   "start_xy": [
    348226.5727036838,
    4981062.721387196
   ],
   "end_xy": [
    348227.037717587,
    4981065.685128424
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.003,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0
   ],
   "windows_unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.002,
   "obstruction_max_height_m": 9.42,
   "flagged_windows_m": []
  },
  "excluded_ranges_m": [
   [
    2353.0,
    2376.0
   ]
  ],
  "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/me/USGS_1M_19_x34y498_NH_Umbagog_LiDAR_2016_D16.tif",
   "data/cache/usa/me/USGS_1M_19_x34y499_NH_Umbagog_LiDAR_2016_D16.tif",
   "data/cache/usa/me/USGS_1M_19_x35y498_NH_Umbagog_LiDAR_2016_D16.tif",
   "data/cache/usa/me/USGS_1M_19_x35y499_NH_Umbagog_LiDAR_2016_D16.tif"
  ],
  "calculated_at": "2026-09-04T19:05:28+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/maine-2026-08-22.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "us-hs-bench-260904",
  "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, NH_Umbagog_LiDAR_2016_D16 (collected 2016)",
  "elevation_tile_ids": [
   "x34y498",
   "x34y499",
   "x35y498",
   "x35y499"
  ],
  "climb_origin": "discovered",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://usgs-lidar-public.s3-us-west-2.amazonaws.com/NH_Umbagog_2016",
   "ept_crs": "EPSG:3857",
   "station_coverage": 0.999,
   "cell_ground_m": 1.0,
   "nodes_failed": 0
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "North Oxford",
  "county": "Maine"
 }
}