{
 "ocl_version": "0.1.0",
 "name": "Dell Road",
 "slug": "dell-road-2",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 47.87841324145177,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 195.0,
   "end_distance_m": 197.0,
   "start_elevation_m": 110.46569019636972,
   "end_elevation_m": 111.42325846119876,
   "min_gradient_pct": -19.652556896055984
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 45.966716314110556,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 195.0,
   "end_distance_m": 198.0,
   "start_elevation_m": 110.46569019636972,
   "end_elevation_m": 111.84469168579304,
   "min_gradient_pct": -11.053046402038072
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 36.2103430422124,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 194.0,
   "end_distance_m": 199.0,
   "start_elevation_m": 110.33176427747154,
   "end_elevation_m": 112.14228142958216,
   "min_gradient_pct": -7.093868660484759
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 33.05055659064308,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 195.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 110.46569019636972,
   "end_elevation_m": 113.77074585543403,
   "min_gradient_pct": -2.4436667998845962
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 23.876904954521905,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 185.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 108.99536486452965,
   "end_elevation_m": 113.77074585543403,
   "min_gradient_pct": 1.4219114602828853
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.533205255476787,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 180.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 108.38744454156483,
   "end_elevation_m": 113.77074585543403,
   "min_gradient_pct": 1.4150632344656628
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 17.64350762518069,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 155.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 104.94899204284368,
   "end_elevation_m": 113.77074585543403,
   "min_gradient_pct": 1.7069787722934677
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 15.562085514797502,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 105.0,
   "end_distance_m": 205.0,
   "start_elevation_m": 98.20866034063653,
   "end_elevation_m": 113.77074585543403,
   "min_gradient_pct": 1.9566323078124697
  }
 ],
 "shape": {
  "ascent_concentration": 0.45,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 97.0,
  "shape_class": "sustained"
 },
 "length_m": 397.7154580870492,
 "start_elevation_m": 89.23138528975859,
 "end_elevation_m": 121.83006622790585,
 "endpoint_gain_m": 32.598680938147254,
 "overall_gradient_pct": 8.196483258393311,
 "accumulated_ascent_m": 34.881927307160254,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 36.2103430422124,
   "start_distance_m": 194.0,
   "end_distance_m": 199.0,
   "midpoint_distance_m": 196.5,
   "start_elevation_m": 110.33176427747154,
   "end_elevation_m": 112.14228142958216,
   "start_xy": [
    321439.4483567207,
    669137.37046881
   ],
   "end_xy": [
    321435.4933913788,
    669140.4295943623
   ]
  },
  "max_10m": {
   "gradient_pct": 33.05055659064308,
   "start_distance_m": 195.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 200.0,
   "start_elevation_m": 110.46569019636972,
   "end_elevation_m": 113.77074585543403,
   "start_xy": [
    321438.6573636523,
    669137.9822939204
   ],
   "end_xy": [
    321430.7474329686,
    669144.100545025
   ]
  },
  "max_20m": {
   "gradient_pct": 23.876904954521905,
   "start_distance_m": 185.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 195.0,
   "start_elevation_m": 108.99536486452965,
   "end_elevation_m": 113.77074585543403,
   "start_xy": [
    321446.3151439011,
    669131.5617073557
   ],
   "end_xy": [
    321430.7474329686,
    669144.100545025
   ]
  },
  "max_25m": {
   "gradient_pct": 21.533205255476787,
   "start_distance_m": 180.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 192.5,
   "start_elevation_m": 108.38744454156483,
   "end_elevation_m": 113.77074585543403,
   "start_xy": [
    321450.0346483394,
    669128.2202575605
   ],
   "end_xy": [
    321430.7474329686,
    669144.100545025
   ]
  },
  "max_50m": {
   "gradient_pct": 17.64350762518069,
   "start_distance_m": 155.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 180.0,
   "start_elevation_m": 104.94899204284368,
   "end_elevation_m": 113.77074585543403,
   "start_xy": [
    321470.6267162634,
    669117.8460716421
   ],
   "end_xy": [
    321430.7474329686,
    669144.100545025
   ]
  },
  "max_100m": {
   "gradient_pct": 15.562085514797502,
   "start_distance_m": 105.0,
   "end_distance_m": 205.0,
   "midpoint_distance_m": 155.0,
   "start_elevation_m": 98.20866034063653,
   "end_elevation_m": 113.77074585543403,
   "start_xy": [
    321520.0588591743,
    669125.3602746762
   ],
   "end_xy": [
    321430.7474329686,
    669144.100545025
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -7.093868660484759,
   "start_distance_m": 41.0,
   "end_distance_m": 46.0,
   "midpoint_distance_m": 43.5,
   "start_elevation_m": 93.71556874083915,
   "end_elevation_m": 93.36087530781491,
   "start_xy": [
    321541.1358483472,
    669169.1481158822
   ],
   "end_xy": [
    321542.3322932676,
    669164.2933739166
   ]
  },
  "min_10m": {
   "gradient_pct": -2.4436667998845962,
   "start_distance_m": 41.0,
   "end_distance_m": 51.0,
   "midpoint_distance_m": 46.0,
   "start_elevation_m": 93.71556874083915,
   "end_elevation_m": 93.47120206085069,
   "start_xy": [
    321541.1358483472,
    669169.1481158822
   ],
   "end_xy": [
    321543.528738188,
    669159.438631951
   ]
  },
  "min_20m": {
   "gradient_pct": 1.4219114602828853,
   "start_distance_m": 269.0,
   "end_distance_m": 289.0,
   "midpoint_distance_m": 279.0,
   "start_elevation_m": 118.95385999408897,
   "end_elevation_m": 119.23824228614555,
   "start_xy": [
    321369.1870677988,
    669154.1761389242
   ],
   "end_xy": [
    321349.2243458212,
    669155.3966843941
   ]
  },
  "min_25m": {
   "gradient_pct": 1.4150632344656628,
   "start_distance_m": 263.0,
   "end_distance_m": 288.0,
   "midpoint_distance_m": 275.5,
   "start_elevation_m": 118.85213428899338,
   "end_elevation_m": 119.2059000976098,
   "start_xy": [
    321375.1758843921,
    669153.8099752832
   ],
   "end_xy": [
    321350.2224819201,
    669155.3356571207
   ]
  },
  "min_50m": {
   "gradient_pct": 1.7069787722934677,
   "start_distance_m": 269.0,
   "end_distance_m": 319.0,
   "midpoint_distance_m": 294.0,
   "start_elevation_m": 118.95385999408897,
   "end_elevation_m": 119.8073493802357,
   "start_xy": [
    321369.1870677988,
    669154.1761389242
   ],
   "end_xy": [
    321323.0510111556,
    669161.3739886513
   ]
  },
  "min_100m": {
   "gradient_pct": 1.9566323078124697,
   "start_distance_m": 263.0,
   "end_distance_m": 363.0,
   "midpoint_distance_m": 313.0,
   "start_elevation_m": 118.85213428899338,
   "end_elevation_m": 120.80876659680585,
   "start_xy": [
    321375.1758843921,
    669153.8099752832
   ],
   "end_xy": [
    321323.56861608534,
    669205.3709440589
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 47.87841324145177,
   "start_distance_m": 195.0,
   "end_distance_m": 197.0,
   "midpoint_distance_m": 196.0,
   "start_elevation_m": 110.46569019636972,
   "end_elevation_m": 111.42325846119876,
   "start_xy": [
    321438.6573636523,
    669137.9822939204
   ],
   "end_xy": [
    321437.0753775156,
    669139.2059441414
   ]
  },
  "max_3m": {
   "gradient_pct": 45.966716314110556,
   "start_distance_m": 195.0,
   "end_distance_m": 198.0,
   "midpoint_distance_m": 196.5,
   "start_elevation_m": 110.46569019636972,
   "end_elevation_m": 111.84469168579304,
   "start_xy": [
    321438.6573636523,
    669137.9822939204
   ],
   "end_xy": [
    321436.2843844472,
    669139.8177692518
   ]
  }
 },
 "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": 0.378,
   "obstruction_max_height_m": 16.01,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": [
   "may_start_earlier"
  ]
 },
 "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:27700",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/scotland/phase-5/dtm/NT26NW.tif"
  ],
  "calculated_at": "2026-08-27T23:35:43+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/scotland-2026-08-27.osm.pbf",
  "osm_snapshot": "2026-08-26T20:22:15Z",
  "run_id": "chains-scot-260827",
  "elevation_provider": "Scottish Remote Sensing Portal (AWS Open Data, srsp-open-data)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Scottish Government, SEPA and partners; Crown copyright",
  "elevation_dataset": "Scottish Public Sector LiDAR Phase 5 50cm",
  "elevation_tile_ids": [
   "NT26NW"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing.html"
 },
 "area": {
  "place": "Colinton",
  "county": "City of Edinburgh"
 }
}