{
 "ocl_version": "0.1.0",
 "name": "Sketch Place North",
 "slug": "sketch-place-north",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 26.82776227529544,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 93.0,
   "end_distance_m": 95.0,
   "start_elevation_m": 44.90810164321144,
   "end_elevation_m": 45.44465688871735,
   "min_gradient_pct": -0.7250312126940273
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 26.308225333819735,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 93.0,
   "end_distance_m": 96.0,
   "start_elevation_m": 44.90810164321144,
   "end_elevation_m": 45.69734840322603,
   "min_gradient_pct": 0.3086921318169307
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 25.626726000612337,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 93.0,
   "end_distance_m": 98.0,
   "start_elevation_m": 44.90810164321144,
   "end_elevation_m": 46.189437943242055,
   "min_gradient_pct": 2.2866813238299954
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 23.74832431903748,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 88.0,
   "end_distance_m": 98.0,
   "start_elevation_m": 43.81460551133831,
   "end_elevation_m": 46.189437943242055,
   "min_gradient_pct": 5.631448135496839
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.26069967792604,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 78.0,
   "end_distance_m": 98.0,
   "start_elevation_m": 41.73729800765685,
   "end_elevation_m": 46.189437943242055,
   "min_gradient_pct": 7.181435048863101
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.7826300974165,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 81.0,
   "end_distance_m": 106.0,
   "start_elevation_m": 42.33626005870191,
   "end_elevation_m": 47.781917583056035,
   "min_gradient_pct": 7.643597000075232
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 20.680352040665383,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 72.0,
   "end_distance_m": 122.0,
   "start_elevation_m": 40.67865716284084,
   "end_elevation_m": 51.018833183173534,
   "min_gradient_pct": 9.639132681652214
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 18.85828292808592,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 57.0,
   "end_distance_m": 157.0,
   "start_elevation_m": 38.32125939929959,
   "end_elevation_m": 57.17954232738551,
   "min_gradient_pct": 11.839608442142977
  }
 ],
 "shape": {
  "ascent_concentration": 0.337,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 164.0,
  "shape_class": "sustained"
 },
 "length_m": 266.0987503375368,
 "start_elevation_m": 30.039620066516427,
 "end_elevation_m": 69.8461065278964,
 "endpoint_gain_m": 39.80648646137997,
 "overall_gradient_pct": 14.959291019174971,
 "accumulated_ascent_m": 39.845142728433345,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 25.626726000612337,
   "start_distance_m": 93.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 95.5,
   "start_elevation_m": 44.90810164321144,
   "end_elevation_m": 46.189437943242055,
   "start_xy": [
    584365.7572510359,
    4519948.437515021
   ],
   "end_xy": [
    584369.6879096937,
    4519945.34722013
   ]
  },
  "max_10m": {
   "gradient_pct": 23.74832431903748,
   "start_distance_m": 88.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 93.0,
   "start_elevation_m": 43.81460551133831,
   "end_elevation_m": 46.189437943242055,
   "start_xy": [
    584361.8265923781,
    4519951.527809912
   ],
   "end_xy": [
    584369.6879096937,
    4519945.34722013
   ]
  },
  "max_20m": {
   "gradient_pct": 22.26069967792604,
   "start_distance_m": 78.0,
   "end_distance_m": 98.0,
   "midpoint_distance_m": 88.0,
   "start_elevation_m": 41.73729800765685,
   "end_elevation_m": 46.189437943242055,
   "start_xy": [
    584353.9652750624,
    4519957.708399695
   ],
   "end_xy": [
    584369.6879096937,
    4519945.34722013
   ]
  },
  "max_25m": {
   "gradient_pct": 21.7826300974165,
   "start_distance_m": 81.0,
   "end_distance_m": 106.0,
   "midpoint_distance_m": 93.5,
   "start_elevation_m": 42.33626005870191,
   "end_elevation_m": 47.781917583056035,
   "start_xy": [
    584356.3236702571,
    4519955.854222761
   ],
   "end_xy": [
    584375.9769635462,
    4519940.4027483035
   ]
  },
  "max_50m": {
   "gradient_pct": 20.680352040665383,
   "start_distance_m": 72.0,
   "end_distance_m": 122.0,
   "midpoint_distance_m": 97.0,
   "start_elevation_m": 40.67865716284084,
   "end_elevation_m": 51.018833183173534,
   "start_xy": [
    584349.248484673,
    4519961.416753565
   ],
   "end_xy": [
    584387.4816394118,
    4519929.366933656
   ]
  },
  "max_100m": {
   "gradient_pct": 18.85828292808592,
   "start_distance_m": 57.0,
   "end_distance_m": 157.0,
   "midpoint_distance_m": 107.0,
   "start_elevation_m": 38.32125939929959,
   "end_elevation_m": 57.17954232738551,
   "start_xy": [
    584337.4565086995,
    4519970.687638239
   ],
   "end_xy": [
    584395.5904483693,
    4519896.331783495
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": 2.2866813238299954,
   "start_distance_m": 0.0,
   "end_distance_m": 5.0,
   "midpoint_distance_m": 2.5,
   "start_elevation_m": 30.039620066516427,
   "end_elevation_m": 30.153954132707927,
   "start_xy": [
    584292.647,
    4520005.917
   ],
   "end_xy": [
    584296.5776586578,
    4520002.826705109
   ]
  },
  "min_10m": {
   "gradient_pct": 5.631448135496839,
   "start_distance_m": 161.0,
   "end_distance_m": 171.0,
   "midpoint_distance_m": 166.0,
   "start_elevation_m": 57.58953598532437,
   "end_elevation_m": 58.15268079887405,
   "start_xy": [
    584394.643303991,
    4519892.45480597
   ],
   "end_xy": [
    584391.4437731355,
    4519882.996448709
   ]
  },
  "min_20m": {
   "gradient_pct": 7.181435048863101,
   "start_distance_m": 164.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 174.0,
   "start_elevation_m": 57.84087403570492,
   "end_elevation_m": 59.27716104547754,
   "start_xy": [
    584393.8435602823,
    4519889.563368611
   ],
   "end_xy": [
    584401.9694435217,
    4519875.380003678
   ]
  },
  "min_25m": {
   "gradient_pct": 7.643597000075232,
   "start_distance_m": 159.0,
   "end_distance_m": 184.0,
   "midpoint_distance_m": 171.5,
   "start_elevation_m": 57.36626179545873,
   "end_elevation_m": 59.27716104547754,
   "start_xy": [
    584395.1764664634,
    4519894.382430876
   ],
   "end_xy": [
    584401.9694435217,
    4519875.380003678
   ]
  },
  "min_50m": {
   "gradient_pct": 9.639132681652214,
   "start_distance_m": 157.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 182.0,
   "start_elevation_m": 57.17954232738551,
   "end_elevation_m": 61.99910866821162,
   "start_xy": [
    584395.5904483693,
    4519896.331783495
   ],
   "end_xy": [
    584420.6130500651,
    4519861.910930397
   ]
  },
  "min_100m": {
   "gradient_pct": 11.839608442142977,
   "start_distance_m": 166.0,
   "end_distance_m": 266.0,
   "midpoint_distance_m": 216.0,
   "start_elevation_m": 58.004301980248044,
   "end_elevation_m": 69.84391042239102,
   "start_xy": [
    584393.2980368206,
    4519887.639907138
   ],
   "end_xy": [
    584468.4379538071,
    4519827.359829371
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 26.82776227529544,
   "start_distance_m": 93.0,
   "end_distance_m": 95.0,
   "midpoint_distance_m": 94.0,
   "start_elevation_m": 44.90810164321144,
   "end_elevation_m": 45.44465688871735,
   "start_xy": [
    584365.7572510359,
    4519948.437515021
   ],
   "end_xy": [
    584367.329514499,
    4519947.201397065
   ]
  },
  "max_3m": {
   "gradient_pct": 26.308225333819735,
   "start_distance_m": 93.0,
   "end_distance_m": 96.0,
   "midpoint_distance_m": 94.5,
   "start_elevation_m": 44.90810164321144,
   "end_elevation_m": 45.69734840322603,
   "start_xy": [
    584365.7572510359,
    4519948.437515021
   ],
   "end_xy": [
    584368.1156462306,
    4519946.5833380865
   ]
  }
 },
 "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:26918",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/usa/nj/USGS_one_meter_x58y452_NJ_SdL5_2014.tif",
   "data/cache/usa/nj/USGS_one_meter_x58y453_NJ_SdL5_2014.tif"
  ],
  "calculated_at": "2026-09-06T21:18:15+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-jersey-2026-09-06.osm.pbf",
  "osm_snapshot": "2026-09-04T20:21:21Z",
  "run_id": "nj-wave2-260906",
  "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, NJ_SdL5_2014 (collected 2014)",
  "elevation_tile_ids": [
   "x58y452",
   "x58y453"
  ],
  "climb_origin": "discovered",
  "canopy_check": "unavailable \u2014 EPT corridor failed: NY_NewYorkCity: no corridor points fetched",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Ridgefield",
  "county": "New Jersey"
 }
}