{
 "ocl_version": "0.1.0",
 "name": "Florence Hill",
 "slug": "florence-hill",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 23.229850159508203,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 645.0,
   "end_distance_m": 647.0,
   "start_elevation_m": 199.0790862312646,
   "end_elevation_m": 199.54368323445476,
   "min_gradient_pct": -4.134782991141606
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 22.974936375219574,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 649.0,
   "end_distance_m": 652.0,
   "start_elevation_m": 199.9394489896254,
   "end_elevation_m": 200.62869708088198,
   "min_gradient_pct": -4.0391717630077055
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 22.7347074060782,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 649.0,
   "end_distance_m": 654.0,
   "start_elevation_m": 199.9394489896254,
   "end_elevation_m": 201.0761843599293,
   "min_gradient_pct": -3.8990672692443695
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 22.497359620142845,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 648.0,
   "end_distance_m": 658.0,
   "start_elevation_m": 199.73262085286518,
   "end_elevation_m": 201.98235681487947,
   "min_gradient_pct": -3.5127117015829867
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 22.098762774927962,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 638.0,
   "end_distance_m": 658.0,
   "start_elevation_m": 197.56260425989387,
   "end_elevation_m": 201.98235681487947,
   "min_gradient_pct": -3.009592444424527
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 21.925151172374854,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 633.0,
   "end_distance_m": 658.0,
   "start_elevation_m": 196.50106902178575,
   "end_elevation_m": 201.98235681487947,
   "min_gradient_pct": -2.9215830556245237
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 21.02876084611267,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 628.0,
   "end_distance_m": 678.0,
   "start_elevation_m": 195.54242001767963,
   "end_elevation_m": 206.05680044073597,
   "min_gradient_pct": -2.709651567547837
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 19.56939088263843,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 625.0,
   "end_distance_m": 725.0,
   "start_elevation_m": 195.0093547560706,
   "end_elevation_m": 214.57874563870902,
   "min_gradient_pct": -1.1473306601524484
  }
 ],
 "shape": {
  "ascent_concentration": 0.512,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 310.0,
  "shape_class": "stepped"
 },
 "length_m": 726.5878002104436,
 "start_elevation_m": 153.00381859863268,
 "end_elevation_m": 214.79857459509185,
 "endpoint_gain_m": 61.79475599645917,
 "overall_gradient_pct": 8.504788544283484,
 "accumulated_ascent_m": 63.854364083927976,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 22.7347074060782,
   "start_distance_m": 649.0,
   "end_distance_m": 654.0,
   "midpoint_distance_m": 651.5,
   "start_elevation_m": 199.9394489896254,
   "end_elevation_m": 201.0761843599293,
   "start_xy": [
    236342.01250137278,
    70551.36102843481
   ],
   "end_xy": [
    236345.99376840194,
    70554.38163937422
   ]
  },
  "max_10m": {
   "gradient_pct": 22.497359620142845,
   "start_distance_m": 648.0,
   "end_distance_m": 658.0,
   "midpoint_distance_m": 653.0,
   "start_elevation_m": 199.73262085286518,
   "end_elevation_m": 201.98235681487947,
   "start_xy": [
    236341.2274472354,
    70550.74160163816
   ],
   "end_xy": [
    236349.36819112237,
    70556.52949185375
   ]
  },
  "max_20m": {
   "gradient_pct": 22.098762774927962,
   "start_distance_m": 638.0,
   "end_distance_m": 658.0,
   "midpoint_distance_m": 648.0,
   "start_elevation_m": 197.56260425989387,
   "end_elevation_m": 201.98235681487947,
   "start_xy": [
    236333.3743729388,
    70544.55054295804
   ],
   "end_xy": [
    236349.36819112237,
    70556.52949185375
   ]
  },
  "max_25m": {
   "gradient_pct": 21.925151172374854,
   "start_distance_m": 633.0,
   "end_distance_m": 658.0,
   "midpoint_distance_m": 645.5,
   "start_elevation_m": 196.50106902178575,
   "end_elevation_m": 201.98235681487947,
   "start_xy": [
    236329.44770045468,
    70541.45518521812
   ],
   "end_xy": [
    236349.36819112237,
    70556.52949185375
   ]
  },
  "max_50m": {
   "gradient_pct": 21.02876084611267,
   "start_distance_m": 628.0,
   "end_distance_m": 678.0,
   "midpoint_distance_m": 653.0,
   "start_elevation_m": 195.54242001767963,
   "end_elevation_m": 206.05680044073597,
   "start_xy": [
    236325.5212986422,
    70538.35948427793
   ],
   "end_xy": [
    236366.2403903072,
    70567.26861873662
   ]
  },
  "max_100m": {
   "gradient_pct": 19.56939088263843,
   "start_distance_m": 625.0,
   "end_distance_m": 725.0,
   "midpoint_distance_m": 675.0,
   "start_elevation_m": 195.0093547560706,
   "end_elevation_m": 214.57874563870902,
   "start_xy": [
    236323.16535957914,
    70536.50218799934
   ],
   "end_xy": [
    236405.88948952194,
    70592.50646193516
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -3.8990672692443695,
   "start_distance_m": 160.0,
   "end_distance_m": 165.0,
   "midpoint_distance_m": 162.5,
   "start_elevation_m": 157.5334606058471,
   "end_elevation_m": 157.33850724238488,
   "start_xy": [
    236083.6419573319,
    70180.18990277505
   ],
   "end_xy": [
    236085.3018645982,
    70184.90633227739
   ]
  },
  "min_10m": {
   "gradient_pct": -3.5127117015829867,
   "start_distance_m": 157.0,
   "end_distance_m": 167.0,
   "midpoint_distance_m": 162.0,
   "start_elevation_m": 157.62248424675096,
   "end_elevation_m": 157.27121307659266,
   "start_xy": [
    236082.64579098418,
    70177.36012318706
   ],
   "end_xy": [
    236085.96692920153,
    70186.79251577424
   ]
  },
  "min_20m": {
   "gradient_pct": -3.009592444424527,
   "start_distance_m": 153.0,
   "end_distance_m": 173.0,
   "midpoint_distance_m": 163.0,
   "start_elevation_m": 157.73330643561826,
   "end_elevation_m": 157.13138794673335,
   "start_xy": [
    236080.84037279317,
    70173.86771196763
   ],
   "end_xy": [
    236087.95882778233,
    70192.45222770705
   ]
  },
  "min_25m": {
   "gradient_pct": -2.9215830556245237,
   "start_distance_m": 155.0,
   "end_distance_m": 180.0,
   "midpoint_distance_m": 167.5,
   "start_elevation_m": 157.68499606700905,
   "end_elevation_m": 156.95460030310292,
   "start_xy": [
    236081.9813129572,
    70175.47373308905
   ],
   "end_xy": [
    236090.06583986292,
    70199.12280526351
   ]
  },
  "min_50m": {
   "gradient_pct": -2.709651567547837,
   "start_distance_m": 154.0,
   "end_distance_m": 204.0,
   "midpoint_distance_m": 179.0,
   "start_elevation_m": 157.71094224252252,
   "end_elevation_m": 156.3561164587486,
   "start_xy": [
    236081.5172551828,
    70174.593221482
   ],
   "end_xy": [
    236096.2141724653,
    70222.32189795306
   ]
  },
  "min_100m": {
   "gradient_pct": -1.1473306601524484,
   "start_distance_m": 139.0,
   "end_distance_m": 239.0,
   "midpoint_distance_m": 189.0,
   "start_elevation_m": 157.65463244742878,
   "end_elevation_m": 156.50730178727633,
   "start_xy": [
    236068.99522446882,
    70166.83374449468
   ],
   "end_xy": [
    236102.2868162961,
    70256.66583367696
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 23.229850159508203,
   "start_distance_m": 645.0,
   "end_distance_m": 647.0,
   "midpoint_distance_m": 646.0,
   "start_elevation_m": 199.0790862312646,
   "end_elevation_m": 199.54368323445476,
   "start_xy": [
    236338.87150826442,
    70548.8843052429
   ],
   "end_xy": [
    236340.44237372244,
    70550.12219915184
   ]
  },
  "max_3m": {
   "gradient_pct": 22.974936375219574,
   "start_distance_m": 649.0,
   "end_distance_m": 652.0,
   "midpoint_distance_m": 650.5,
   "start_elevation_m": 199.9394489896254,
   "end_elevation_m": 200.62869708088198,
   "start_xy": [
    236342.01250137278,
    70551.36102843481
   ],
   "end_xy": [
    236344.36860798884,
    70553.21811239833
   ]
  }
 },
 "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": 0.047,
   "obstruction_max_height_m": 9.29,
   "flagged_windows_m": []
  },
  "review": [],
  "extent": [
   "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:27700",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/england/bulk_dtm_1m/SX3570.tif"
  ],
  "calculated_at": "2026-08-19T18:34:15+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/england-2026-08-12.osm.pbf",
  "osm_snapshot": "2026-08-12T20:21:46Z",
  "elevation_provider": "Environment Agency",
  "elevation_dataset": "EA LIDAR Composite DTM 1m (2022)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Environment Agency",
  "elevation_coverage_id": "13787b9a-26a4-4775-8523-806d13af58fc__Lidar_Composite_Elevation_DTM_1m",
  "elevation_tile_ids": [
   "SX3570.tif"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 17.1% over 200 m (Terrain 50), gain 57.6 m over 604 m way. EXTENDED by graph walk: +1 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (England launch slice 2026-08-16): clean-steep."
 },
 "area": {
  "place": "Callington",
  "county": "Cornwall"
 }
}