{
 "ocl_version": "0.1.0",
 "name": "Rhiw Staerdywyll",
 "slug": "rhiw-staerdywyll",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 46.205339633807796,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 257.0,
   "end_distance_m": 259.0,
   "start_elevation_m": 117.41895940397923,
   "end_elevation_m": 118.34306619665539,
   "min_gradient_pct": -40.177088541667416,
   "suppressed_max_gradient_pct": 97.57356003309354,
   "suppressed_location_m": [
    194.0,
    196.0
   ]
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 44.19805220114578,
   "diagnostic": true,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 256.0,
   "end_distance_m": 259.0,
   "start_elevation_m": 117.01712463062101,
   "end_elevation_m": 118.34306619665539,
   "min_gradient_pct": -24.092405635391856,
   "suppressed_max_gradient_pct": 72.99938311286762,
   "suppressed_location_m": [
    194.0,
    197.0
   ]
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 39.00246078824438,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 255.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 116.66364585530557,
   "end_elevation_m": 118.6137688947178,
   "min_gradient_pct": -21.78170871134455,
   "suppressed_max_gradient_pct": 53.38157063454304,
   "suppressed_location_m": [
    194.0,
    199.0
   ]
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 32.34565721303582,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 260.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 118.6137688947178,
   "min_gradient_pct": -13.479290415635319,
   "suppressed_max_gradient_pct": 38.131006905610576,
   "suppressed_location_m": [
    194.0,
    204.0
   ]
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 24.249224095344815,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "texture_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 270.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 120.22904799248317,
   "min_gradient_pct": 0.2685529463201419,
   "suppressed_max_gradient_pct": 28.58598149273689,
   "suppressed_location_m": [
    194.0,
    214.0
   ]
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 23.114313842280634,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 275.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 121.15778163398437,
   "min_gradient_pct": 0.3015445475476781,
   "suppressed_max_gradient_pct": 24.397336962573263,
   "suppressed_location_m": [
    194.0,
    219.0
   ]
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 19.865758530340855,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 300.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 125.31208243858464,
   "min_gradient_pct": 0.4690528682345416
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 17.471360841178964,
   "diagnostic": false,
   "flags": [
    "structure_excluded",
    "canopy_or_structure"
   ],
   "start_distance_m": 250.0,
   "end_distance_m": 350.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 132.85056401459317,
   "min_gradient_pct": 0.7378438772784364,
   "suppressed_max_gradient_pct": 18.874210146645808,
   "suppressed_location_m": [
    194.0,
    294.0
   ]
  }
 ],
 "shape": {
  "ascent_concentration": 0.477,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 111.0,
  "shape_class": "stepped"
 },
 "length_m": 1304.2118288152249,
 "start_elevation_m": 89.25935153927756,
 "end_elevation_m": 199.45118758873144,
 "endpoint_gain_m": 110.19183604945388,
 "overall_gradient_pct": 8.448921687020322,
 "accumulated_ascent_m": 116.89156074228285,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 39.00246078824438,
   "start_distance_m": 255.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 257.5,
   "start_elevation_m": 116.66364585530557,
   "end_elevation_m": 118.6137688947178,
   "start_xy": [
    273019.46477348567,
    310470.71855693747
   ],
   "end_xy": [
    273022.1368899409,
    310466.4924728971
   ]
  },
  "max_10m": {
   "gradient_pct": 32.34565721303582,
   "start_distance_m": 250.0,
   "end_distance_m": 260.0,
   "midpoint_distance_m": 255.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 118.6137688947178,
   "start_xy": [
    273017.9563983486,
    310475.4750148954
   ],
   "end_xy": [
    273022.1368899409,
    310466.4924728971
   ]
  },
  "max_20m": {
   "gradient_pct": 24.249224095344815,
   "start_distance_m": 250.0,
   "end_distance_m": 270.0,
   "midpoint_distance_m": 260.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 120.22904799248317,
   "start_xy": [
    273017.9563983486,
    310475.4750148954
   ],
   "end_xy": [
    273027.48170150456,
    310458.0406708402
   ]
  },
  "max_25m": {
   "gradient_pct": 23.114313842280634,
   "start_distance_m": 250.0,
   "end_distance_m": 275.0,
   "midpoint_distance_m": 262.5,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 121.15778163398437,
   "start_xy": [
    273017.9563983486,
    310475.4750148954
   ],
   "end_xy": [
    273030.15491011745,
    310453.81527722965
   ]
  },
  "max_50m": {
   "gradient_pct": 19.865758530340855,
   "start_distance_m": 250.0,
   "end_distance_m": 300.0,
   "midpoint_distance_m": 275.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 125.31208243858464,
   "start_xy": [
    273017.9563983486,
    310475.4750148954
   ],
   "end_xy": [
    273044.9915567917,
    310433.77154899406
   ]
  },
  "max_100m": {
   "gradient_pct": 17.471360841178964,
   "start_distance_m": 250.0,
   "end_distance_m": 350.0,
   "midpoint_distance_m": 300.0,
   "start_elevation_m": 115.37920317341421,
   "end_elevation_m": 132.85056401459317,
   "start_xy": [
    273017.9563983486,
    310475.4750148954
   ],
   "end_xy": [
    273079.809390001,
    310398.2650808038
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -21.78170871134455,
   "start_distance_m": 462.0,
   "end_distance_m": 467.0,
   "midpoint_distance_m": 464.5,
   "start_elevation_m": 149.68826490488993,
   "end_elevation_m": 148.5991794693227,
   "start_xy": [
    273168.0248807032,
    310329.31984170305
   ],
   "end_xy": [
    273171.87501543213,
    310326.12978489534
   ]
  },
  "min_10m": {
   "gradient_pct": -13.479290415635319,
   "start_distance_m": 461.0,
   "end_distance_m": 471.0,
   "midpoint_distance_m": 466.0,
   "start_elevation_m": 149.7785166798197,
   "end_elevation_m": 148.43058763825616,
   "start_xy": [
    273167.2544002254,
    310329.9573052681
   ],
   "end_xy": [
    273174.95597272064,
    310323.57876546006
   ]
  },
  "min_20m": {
   "gradient_pct": 0.2685529463201419,
   "start_distance_m": 1036.0,
   "end_distance_m": 1056.0,
   "midpoint_distance_m": 1046.0,
   "start_elevation_m": 193.3663616713861,
   "end_elevation_m": 193.42007226065013,
   "start_xy": [
    273516.50792998384,
    309944.61084066035
   ],
   "end_xy": [
    273524.30150818435,
    309926.1976830322
   ]
  },
  "min_25m": {
   "gradient_pct": 0.3015445475476781,
   "start_distance_m": 1029.0,
   "end_distance_m": 1054.0,
   "midpoint_distance_m": 1041.5,
   "start_elevation_m": 193.31831173034627,
   "end_elevation_m": 193.3936978672332,
   "start_xy": [
    273513.5969266299,
    309950.97684799705
   ],
   "end_xy": [
    273523.5597290431,
    309928.05503697833
   ]
  },
  "min_50m": {
   "gradient_pct": 0.4690528682345416,
   "start_distance_m": 1002.0,
   "end_distance_m": 1052.0,
   "midpoint_distance_m": 1027.0,
   "start_elevation_m": 193.16483498034083,
   "end_elevation_m": 193.3993614144581,
   "start_xy": [
    273502.40259633266,
    309975.54663859954
   ],
   "end_xy": [
    273522.8176375372,
    309929.9122661131
   ]
  },
  "min_100m": {
   "gradient_pct": 0.7378438772784364,
   "start_distance_m": 999.0,
   "end_distance_m": 1099.0,
   "midpoint_distance_m": 1049.0,
   "start_elevation_m": 193.12367641447813,
   "end_elevation_m": 193.86152029175656,
   "start_xy": [
    273501.1965136366,
    309978.29352116626
   ],
   "end_xy": [
    273539.5879847592,
    309886.01663259
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 46.205339633807796,
   "start_distance_m": 257.0,
   "end_distance_m": 259.0,
   "midpoint_distance_m": 258.0,
   "start_elevation_m": 117.41895940397923,
   "end_elevation_m": 118.34306619665539,
   "start_xy": [
    273020.5339708834,
    310469.0283450534
   ],
   "end_xy": [
    273021.6026258781,
    310467.33779051126
   ]
  },
  "max_3m": {
   "gradient_pct": 44.19805220114578,
   "start_distance_m": 256.0,
   "end_distance_m": 259.0,
   "midpoint_distance_m": 257.5,
   "start_elevation_m": 117.01712463062101,
   "end_elevation_m": 118.34306619665539,
   "start_xy": [
    273019.9990377459,
    310469.8732394482
   ],
   "end_xy": [
    273021.6026258781,
    310467.33779051126
   ]
  }
 },
 "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": {
  "structure_suppression": {
   "masked_fraction": 0.014,
   "windows_resited": [
    2.0,
    3.0,
    5.0,
    10.0,
    20.0,
    25.0,
    100.0
   ],
   "windows_unresolved": []
  },
  "no_bench_suppression": {
   "masked_fraction": 0.062,
   "windows_resited": [],
   "windows_unresolved": []
  },
  "texture_suppression": {
   "masked_fraction": 0.08,
   "windows_resited": [
    10.0,
    20.0
   ],
   "windows_unresolved": []
  },
  "texture_windows": {
   "rounds": 1,
   "windows_masked": [
    {
     "window_m": 20.0,
     "start_m": 472.0,
     "end_m": 492.0,
     "raw_pct": 26.73,
     "reason": "hump+mask-edge"
    },
    {
     "window_m": 10.0,
     "start_m": 473.0,
     "end_m": 483.0,
     "raw_pct": 33.14,
     "reason": "hump+mask-edge+short-step"
    }
   ],
   "advisory": [],
   "unresolved": []
  },
  "overhead_obstruction": {
   "obstruction_threshold_m": 2.0,
   "obstructed_fraction": 0.341,
   "obstruction_max_height_m": 22.14,
   "flagged_windows_m": [
    2,
    3,
    5,
    10,
    20,
    25,
    50,
    100
   ]
  },
  "excluded_ranges_m": [
   [
    130.0,
    173.0
   ],
   [
    193.0,
    198.0
   ],
   [
    440.0,
    494.0
   ]
  ],
  "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:27700",
  "elevation_resolution_m": 1.0,
  "elevation_tiles": [
   "data/cache/wales/dtm_1m/wg_del_22_272309_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_272310_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_273309_20220114dtm.tif",
   "data/cache/wales/dtm_1m/wg_del_22_273310_20220114dtm.tif"
  ],
  "calculated_at": "2026-09-12T01:42:40+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "output/texture-uk-wales/batch-england-rchunk04.pbf",
  "osm_snapshot": "",
  "run_id": "texture-uk-wales-260912",
  "elevation_provider": "Welsh Government",
  "elevation_dataset": "Welsh Government LiDAR 1m DTM (2020-2023)",
  "elevation_licence": "Open Government Licence v3 \u2014 \u00a9 Crown copyright Welsh Government",
  "elevation_catalogue_layer": "geonode:welsh_government_lidar_tile_catalogue_2020_2023",
  "elevation_tile_ids": [
   "wg_del_22_272309_20220114dtm.tif",
   "wg_del_22_272310_20220114dtm.tif",
   "wg_del_22_273309_20220114dtm.tif",
   "wg_del_22_273310_20220114dtm.tif"
  ],
  "elevation_capture_dates": [
   "14-01-2022"
  ],
  "climb_origin": "discovered",
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Dol-ffanog",
  "county": "Gwynedd - Gwynedd"
 }
}