{
 "ocl_version": "0.1.0",
 "name": "Round-the-Pond Road",
 "slug": "round-the-pond-road",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 38.85511621173805,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2105.0,
   "end_distance_m": 2107.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 161.00774680597743,
   "min_gradient_pct": -33.34109500902258
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 31.169520032152793,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 2104.0,
   "end_distance_m": 2107.0,
   "start_elevation_m": 160.07266120501285,
   "end_elevation_m": 161.00774680597743,
   "min_gradient_pct": -28.311466461509365
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.993949474005376,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2105.0,
   "end_distance_m": 2110.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 161.68034195544294,
   "min_gradient_pct": -25.164030888391267
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.40784138699985,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2105.0,
   "end_distance_m": 2115.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 162.87142862044266,
   "min_gradient_pct": -23.843855394639775
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.947082688730575,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2105.0,
   "end_distance_m": 2125.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 164.6200610194888,
   "min_gradient_pct": -20.494762899377577
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.92922853021207,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2100.0,
   "end_distance_m": 2125.0,
   "start_elevation_m": 159.38775388693577,
   "end_elevation_m": 164.6200610194888,
   "min_gradient_pct": -19.491720408745778
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.813723643196056,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2076.0,
   "end_distance_m": 2126.0,
   "start_elevation_m": 156.36871377572083,
   "end_elevation_m": 164.77557559731886,
   "min_gradient_pct": -14.039337093824884
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 11.05419586452936,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 2033.0,
   "end_distance_m": 2133.0,
   "start_elevation_m": 154.19724819141902,
   "end_elevation_m": 165.25144405594838,
   "min_gradient_pct": -10.729762455941
  }
 ],
 "shape": {
  "ascent_concentration": 0.383,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 59.0,
  "shape_class": "sustained"
 },
 "length_m": 5376.302317002008,
 "start_elevation_m": 147.1385681806685,
 "end_elevation_m": 182.22654645172665,
 "endpoint_gain_m": 35.08797827105815,
 "overall_gradient_pct": 0.6526414662377894,
 "accumulated_ascent_m": 145.07107993497053,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.993949474005376,
   "start_distance_m": 2105.0,
   "end_distance_m": 2110.0,
   "midpoint_distance_m": 2107.5,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 161.68034195544294,
   "start_xy": [
    372069.64066636056,
    4902584.322187865
   ],
   "end_xy": [
    372072.7343401648,
    4902580.39418807
   ]
  },
  "max_10m": {
   "gradient_pct": 26.40784138699985,
   "start_distance_m": 2105.0,
   "end_distance_m": 2115.0,
   "midpoint_distance_m": 2110.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 162.87142862044266,
   "start_xy": [
    372069.64066636056,
    4902584.322187865
   ],
   "end_xy": [
    372075.82801396906,
    4902576.466188274
   ]
  },
  "max_20m": {
   "gradient_pct": 21.947082688730575,
   "start_distance_m": 2105.0,
   "end_distance_m": 2125.0,
   "midpoint_distance_m": 2115.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 164.6200610194888,
   "start_xy": [
    372069.64066636056,
    4902584.322187865
   ],
   "end_xy": [
    372082.01536157756,
    4902568.6101886835
   ]
  },
  "max_25m": {
   "gradient_pct": 20.92922853021207,
   "start_distance_m": 2100.0,
   "end_distance_m": 2125.0,
   "midpoint_distance_m": 2112.5,
   "start_elevation_m": 159.38775388693577,
   "end_elevation_m": 164.6200610194888,
   "start_xy": [
    372066.5469925563,
    4902588.250187661
   ],
   "end_xy": [
    372082.01536157756,
    4902568.6101886835
   ]
  },
  "max_50m": {
   "gradient_pct": 16.813723643196056,
   "start_distance_m": 2076.0,
   "end_distance_m": 2126.0,
   "midpoint_distance_m": 2101.0,
   "start_elevation_m": 156.36871377572083,
   "end_elevation_m": 164.77557559731886,
   "start_xy": [
    372051.6973582959,
    4902607.104586679
   ],
   "end_xy": [
    372082.6340963384,
    4902567.824588724
   ]
  },
  "max_100m": {
   "gradient_pct": 11.05419586452936,
   "start_distance_m": 2033.0,
   "end_distance_m": 2133.0,
   "midpoint_distance_m": 2083.0,
   "start_elevation_m": 154.19724819141902,
   "end_elevation_m": 165.25144405594838,
   "start_xy": [
    372025.0917635793,
    4902640.885384919
   ],
   "end_xy": [
    372086.96523966437,
    4902562.325389011
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -25.164030888391267,
   "start_distance_m": 4319.0,
   "end_distance_m": 4324.0,
   "midpoint_distance_m": 4321.5,
   "start_elevation_m": 155.69126404229323,
   "end_elevation_m": 154.43306249787366,
   "start_xy": [
    373057.3334361161,
    4900631.33902619
   ],
   "end_xy": [
    373060.3665833216,
    4900627.36410254
   ]
  },
  "min_10m": {
   "gradient_pct": -23.843855394639775,
   "start_distance_m": 2315.0,
   "end_distance_m": 2325.0,
   "midpoint_distance_m": 2320.0,
   "start_elevation_m": 165.28459320521333,
   "end_elevation_m": 162.90020766574935,
   "start_xy": [
    372172.51436743495,
    4902402.648624381
   ],
   "end_xy": [
    372177.2420476246,
    4902393.836755112
   ]
  },
  "min_20m": {
   "gradient_pct": -20.494762899377577,
   "start_distance_m": 2308.0,
   "end_distance_m": 2328.0,
   "midpoint_distance_m": 2318.0,
   "start_elevation_m": 166.5535859654555,
   "end_elevation_m": 162.45463338558,
   "start_xy": [
    372169.2081675596,
    4902408.818524152
   ],
   "end_xy": [
    372178.6603516815,
    4902391.193194331
   ]
  },
  "min_25m": {
   "gradient_pct": -19.491720408745778,
   "start_distance_m": 2304.0,
   "end_distance_m": 2329.0,
   "midpoint_distance_m": 2316.5,
   "start_elevation_m": 167.12958895997517,
   "end_elevation_m": 162.25665885778872,
   "start_xy": [
    372167.5172551703,
    4902412.443550399
   ],
   "end_xy": [
    372179.1331197005,
    4902390.312007404
   ]
  },
  "min_50m": {
   "gradient_pct": -14.039337093824884,
   "start_distance_m": 986.0,
   "end_distance_m": 1036.0,
   "midpoint_distance_m": 1011.0,
   "start_elevation_m": 155.2117431262304,
   "end_elevation_m": 148.19207457931796,
   "start_xy": [
    371209.6834220917,
    4902639.967071549
   ],
   "end_xy": [
    371251.67934275314,
    4902667.10270583
   ]
  },
  "min_100m": {
   "gradient_pct": -10.729762455941,
   "start_distance_m": 103.0,
   "end_distance_m": 203.0,
   "midpoint_distance_m": 153.0,
   "start_elevation_m": 147.2543888419513,
   "end_elevation_m": 136.5246263860103,
   "start_xy": [
    370423.0725768977,
    4902241.814049986
   ],
   "end_xy": [
    370513.93333116727,
    4902283.5791470595
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 38.85511621173805,
   "start_distance_m": 2105.0,
   "end_distance_m": 2107.0,
   "midpoint_distance_m": 2106.0,
   "start_elevation_m": 160.23064448174267,
   "end_elevation_m": 161.00774680597743,
   "start_xy": [
    372069.64066636056,
    4902584.322187865
   ],
   "end_xy": [
    372070.87813588226,
    4902582.750987947
   ]
  },
  "max_3m": {
   "gradient_pct": 31.169520032152793,
   "start_distance_m": 2104.0,
   "end_distance_m": 2107.0,
   "midpoint_distance_m": 2105.5,
   "start_elevation_m": 160.07266120501285,
   "end_elevation_m": 161.00774680597743,
   "start_xy": [
    372069.0219315997,
    4902585.107787824
   ],
   "end_xy": [
    372070.87813588226,
    4902582.750987947
   ]
  }
 },
 "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": []
 },
 "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_x37y491_ME_WesternMtns_B24.tif"
  ],
  "calculated_at": "2026-08-24T20:58:12+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": "redo-me-5-260824",
  "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": [
   "x37y491"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 8.2% over 200 m (Terrain 50), gain 35.5 m over 5376 m way. KEPT at seed extent: no ascending continuation (min_avg=2.0%). ADOPTED (NE wave 1, 2026-08-25): clean-steep. Wales dials per PRODUCTION 'US ADOPTION DIALS'.",
  "canopy_check": "unavailable \u2014 no surface model (DSM or point cloud) registered for this coverage",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Norway",
  "county": "Maine"
 }
}