{
 "ocl_version": "0.1.0",
 "name": "Pack Monadnock (Miller State Park)",
 "slug": "pack-monadnock-miller-state-park",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 29.192731066342503,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1935.0,
   "end_distance_m": 1937.0,
   "start_elevation_m": 657.1015133569894,
   "end_elevation_m": 657.6853679783162,
   "min_gradient_pct": -3.3665451523688716
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 28.588324029370444,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1935.0,
   "end_distance_m": 1938.0,
   "start_elevation_m": 657.1015133569894,
   "end_elevation_m": 657.9591630778705,
   "min_gradient_pct": -3.2132395892782974
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 27.09278976491305,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1934.0,
   "end_distance_m": 1939.0,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 658.1941074890758,
   "min_gradient_pct": -2.8869159465330085
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 24.46858942405356,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1934.0,
   "end_distance_m": 1944.0,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 659.2863269432355,
   "min_gradient_pct": -2.241485871313671
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.71052772168639,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1934.0,
   "end_distance_m": 1954.0,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 661.5815735451674,
   "min_gradient_pct": -1.04888394151061
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.25534635882832,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1934.0,
   "end_distance_m": 1959.0,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 662.6533045905372,
   "min_gradient_pct": -0.928394631959236
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.095070671590065,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1912.0,
   "end_distance_m": 1962.0,
   "start_elevation_m": 652.687296267511,
   "end_elevation_m": 663.234831603306,
   "min_gradient_pct": -0.6710577210535575
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.29949845058195,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 1911.0,
   "end_distance_m": 2011.0,
   "start_elevation_m": 652.5224078816375,
   "end_elevation_m": 671.8219063322194,
   "min_gradient_pct": 0.8011269603019286
  }
 ],
 "shape": {
  "ascent_concentration": 0.323,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 236.0,
  "shape_class": "sustained"
 },
 "length_m": 2111.4826535309066,
 "start_elevation_m": 449.0804187607779,
 "end_elevation_m": 689.0281025696021,
 "endpoint_gain_m": 239.9476838088242,
 "overall_gradient_pct": 11.363942934012456,
 "accumulated_ascent_m": 240.88930161922428,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 27.09278976491305,
   "start_distance_m": 1934.0,
   "end_distance_m": 1939.0,
   "midpoint_distance_m": 1936.5,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 658.1941074890758,
   "start_xy": [
    264703.9655454569,
    4749319.580232226
   ],
   "end_xy": [
    264706.0575987396,
    4749324.121522028
   ]
  },
  "max_10m": {
   "gradient_pct": 24.46858942405356,
   "start_distance_m": 1934.0,
   "end_distance_m": 1944.0,
   "midpoint_distance_m": 1939.0,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 659.2863269432355,
   "start_xy": [
    264703.9655454569,
    4749319.580232226
   ],
   "end_xy": [
    264708.4063422107,
    4749328.532596171
   ]
  },
  "max_20m": {
   "gradient_pct": 23.71052772168639,
   "start_distance_m": 1934.0,
   "end_distance_m": 1954.0,
   "midpoint_distance_m": 1944.0,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 661.5815735451674,
   "start_xy": [
    264703.9655454569,
    4749319.580232226
   ],
   "end_xy": [
    264713.26388652925,
    4749337.273549391
   ]
  },
  "max_25m": {
   "gradient_pct": 23.25534635882832,
   "start_distance_m": 1934.0,
   "end_distance_m": 1959.0,
   "midpoint_distance_m": 1946.5,
   "start_elevation_m": 656.8394680008302,
   "end_elevation_m": 662.6533045905372,
   "start_xy": [
    264703.9655454569,
    4749319.580232226
   ],
   "end_xy": [
    264715.6926586885,
    4749341.644026001
   ]
  },
  "max_50m": {
   "gradient_pct": 21.095070671590065,
   "start_distance_m": 1912.0,
   "end_distance_m": 1962.0,
   "midpoint_distance_m": 1937.0,
   "start_elevation_m": 652.687296267511,
   "end_elevation_m": 663.234831603306,
   "start_xy": [
    264695.0576719163,
    4749299.472751712
   ],
   "end_xy": [
    264717.14992198406,
    4749344.266311967
   ]
  },
  "max_100m": {
   "gradient_pct": 19.29949845058195,
   "start_distance_m": 1911.0,
   "end_distance_m": 2011.0,
   "midpoint_distance_m": 1961.0,
   "start_elevation_m": 652.5224078816375,
   "end_elevation_m": 671.8219063322194,
   "start_xy": [
    264694.6967437009,
    4749298.540158112
   ],
   "end_xy": [
    264744.77696604846,
    4749384.729346627
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.8869159465330085,
   "start_distance_m": 1218.0,
   "end_distance_m": 1223.0,
   "midpoint_distance_m": 1220.5,
   "start_elevation_m": 591.8407985836594,
   "end_elevation_m": 591.6964527863328,
   "start_xy": [
    264391.55135876144,
    4748724.586676243
   ],
   "end_xy": [
    264392.16733428446,
    4748729.548588592
   ]
  },
  "min_10m": {
   "gradient_pct": -2.241485871313671,
   "start_distance_m": 1218.0,
   "end_distance_m": 1228.0,
   "midpoint_distance_m": 1223.0,
   "start_elevation_m": 591.8407985836594,
   "end_elevation_m": 591.616649996528,
   "start_xy": [
    264391.55135876144,
    4748724.586676243
   ],
   "end_xy": [
    264392.7833098075,
    4748734.51050094
   ]
  },
  "min_20m": {
   "gradient_pct": -1.04888394151061,
   "start_distance_m": 83.0,
   "end_distance_m": 103.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 451.3897353434999,
   "end_elevation_m": 451.1799585551978,
   "start_xy": [
    264098.62247548834,
    4748207.888295052
   ],
   "end_xy": [
    264102.23156021326,
    4748227.55577543
   ]
  },
  "min_25m": {
   "gradient_pct": -0.928394631959236,
   "start_distance_m": 80.0,
   "end_distance_m": 105.0,
   "midpoint_distance_m": 92.5,
   "start_elevation_m": 451.400187576023,
   "end_elevation_m": 451.16808891803316,
   "start_xy": [
    264097.9159918721,
    4748204.972668035
   ],
   "end_xy": [
    264102.71675406944,
    4748229.4943680065
   ]
  },
  "min_50m": {
   "gradient_pct": -0.6710577210535575,
   "start_distance_m": 54.0,
   "end_distance_m": 104.0,
   "midpoint_distance_m": 79.0,
   "start_elevation_m": 451.5051526691374,
   "end_elevation_m": 451.1696238086106,
   "start_xy": [
    264090.69849999086,
    4748180.019139689
   ],
   "end_xy": [
    264102.4520256137,
    4748228.530045008
   ]
  },
  "min_100m": {
   "gradient_pct": 0.8011269603019286,
   "start_distance_m": 26.0,
   "end_distance_m": 126.0,
   "midpoint_distance_m": 76.0,
   "start_elevation_m": 451.026547963325,
   "end_elevation_m": 451.82767492362694,
   "start_xy": [
    264081.1582400822,
    4748153.69744364
   ],
   "end_xy": [
    264108.27605164016,
    4748249.7451509675
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 29.192731066342503,
   "start_distance_m": 1935.0,
   "end_distance_m": 1937.0,
   "midpoint_distance_m": 1936.0,
   "start_elevation_m": 657.1015133569894,
   "end_elevation_m": 657.6853679783162,
   "start_xy": [
    264704.3839561134,
    4749320.488490187
   ],
   "end_xy": [
    264705.2207774265,
    4749322.305006107
   ]
  },
  "max_3m": {
   "gradient_pct": 28.588324029370444,
   "start_distance_m": 1935.0,
   "end_distance_m": 1938.0,
   "midpoint_distance_m": 1936.5,
   "start_elevation_m": 657.1015133569894,
   "end_elevation_m": 657.9591630778705,
   "start_xy": [
    264704.3839561134,
    4749320.488490187
   ],
   "end_xy": [
    264705.63918808306,
    4749323.213264068
   ]
  }
 },
 "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": {
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.524,
   "obstruction_max_height_m": 22.46,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "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:26919",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/nh/USGS_1M_19_x26y475_NH_Coastal_2019_B19.tif"
  ],
  "calculated_at": "2026-08-22T14:29:54+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_ids": [
   5568982
  ],
  "osm_versions": {
   "5568982": 4
  },
  "osm_timestamps": {
   "5568982": "2020-11-11 16:46:11+00:00"
  },
  "osm_retrieved_at": "2026-08-22T14:29:54+00:00",
  "osm_pbf_path": "data/cache/pbf/new-hampshire-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "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_Coastal_2019_B19 (collected 2019)",
  "elevation_tile_ids": [
   "x26y475"
  ],
  "climb_origin": "named",
  "notes": "ANNEX - state-park summit road, BUMPS venue. Miller Park Road asphalt; single way from park entrance to 55 m from GNIS summit (the other Miller Park Road fragments are a disconnected summit loop, dropped 2026-08-22).",
  "canopy_source": {
   "kind": "ept_corridor_max_return",
   "ept_source": "https://s3-us-west-2.amazonaws.com/usgs-lidar-public/NH_Coastal_2_2019",
   "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": "New Hampshire",
  "county": ""
 }
}