{
 "ocl_version": "0.1.0",
 "name": "Rue des Grenouilloux",
 "slug": "impasse-des-reservoirs",
 "confidence": "B",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 32.147287244114864,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 217.0,
   "end_distance_m": 219.0,
   "start_elevation_m": 134.7524592629108,
   "end_elevation_m": 135.3954050077931,
   "min_gradient_pct": -4.221360136534713
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 30.092161804099266,
   "diagnostic": true,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 142.0,
   "end_distance_m": 145.0,
   "start_elevation_m": 119.244099048925,
   "end_elevation_m": 120.14686390304797,
   "min_gradient_pct": -3.330277401164494
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 28.56888252185172,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 142.0,
   "end_distance_m": 147.0,
   "start_elevation_m": 119.244099048925,
   "end_elevation_m": 120.67254317501758,
   "min_gradient_pct": -2.444236406166169
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 26.730494838630534,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 197.0,
   "end_distance_m": 207.0,
   "start_elevation_m": 130.41039318842166,
   "end_elevation_m": 133.08344267228472,
   "min_gradient_pct": -1.409606770627363
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 25.737138427948736,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 189.0,
   "end_distance_m": 209.0,
   "start_elevation_m": 128.4574227392108,
   "end_elevation_m": 133.60485042480056,
   "min_gradient_pct": -0.17718309151590006
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 25.652158359033418,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 184.0,
   "end_distance_m": 209.0,
   "start_elevation_m": 127.1918108350422,
   "end_elevation_m": 133.60485042480056,
   "min_gradient_pct": 0.1940759845890625
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 23.237515352024758,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 171.0,
   "end_distance_m": 221.0,
   "start_elevation_m": 124.22956896452165,
   "end_elevation_m": 135.84832664053403,
   "min_gradient_pct": 0.4027120029268758
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 20.069500567537716,
   "diagnostic": false,
   "flags": [
    "canopy_or_structure"
   ],
   "start_distance_m": 140.0,
   "end_distance_m": 240.0,
   "start_elevation_m": 118.77568880455931,
   "end_elevation_m": 138.84518937209702,
   "min_gradient_pct": 1.9625939348351835
  }
 ],
 "shape": {
  "ascent_concentration": 0.543,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 211.0,
  "shape_class": "stepped"
 },
 "length_m": 677.781860800596,
 "start_elevation_m": 110.08177110259912,
 "end_elevation_m": 165.15512032105252,
 "endpoint_gain_m": 55.0733492184534,
 "overall_gradient_pct": 8.125527164949615,
 "accumulated_ascent_m": 55.652638198164865,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 28.56888252185172,
   "start_distance_m": 142.0,
   "end_distance_m": 147.0,
   "midpoint_distance_m": 144.5,
   "start_elevation_m": 119.244099048925,
   "end_elevation_m": 120.67254317501758,
   "start_xy": [
    567072.123546938,
    6419021.078081406
   ],
   "end_xy": [
    567067.8177012462,
    6419023.619673993
   ]
  },
  "max_10m": {
   "gradient_pct": 26.730494838630534,
   "start_distance_m": 197.0,
   "end_distance_m": 207.0,
   "midpoint_distance_m": 202.0,
   "start_elevation_m": 130.41039318842166,
   "end_elevation_m": 133.08344267228472,
   "start_xy": [
    567028.7471696198,
    6419054.1740751015
   ],
   "end_xy": [
    567023.0814513313,
    6419062.013435393
   ]
  },
  "max_20m": {
   "gradient_pct": 25.737138427948736,
   "start_distance_m": 189.0,
   "end_distance_m": 209.0,
   "midpoint_distance_m": 199.0,
   "start_elevation_m": 128.4574227392108,
   "end_elevation_m": 133.60485042480056,
   "start_xy": [
    567034.3963616495,
    6419048.509568997
   ],
   "end_xy": [
    567022.6610646645,
    6419063.968755073
   ]
  },
  "max_25m": {
   "gradient_pct": 25.652158359033418,
   "start_distance_m": 184.0,
   "end_distance_m": 209.0,
   "midpoint_distance_m": 196.5,
   "start_elevation_m": 127.1918108350422,
   "end_elevation_m": 133.60485042480056,
   "start_xy": [
    567037.9271066682,
    6419044.969252681
   ],
   "end_xy": [
    567022.6610646645,
    6419063.968755073
   ]
  },
  "max_50m": {
   "gradient_pct": 23.237515352024758,
   "start_distance_m": 171.0,
   "end_distance_m": 221.0,
   "midpoint_distance_m": 196.0,
   "start_elevation_m": 124.22956896452165,
   "end_elevation_m": 135.84832664053403,
   "start_xy": [
    567047.149641926,
    6419035.819318412
   ],
   "end_xy": [
    567020.1387446639,
    6419075.700673152
   ]
  },
  "max_100m": {
   "gradient_pct": 20.069500567537716,
   "start_distance_m": 140.0,
   "end_distance_m": 240.0,
   "midpoint_distance_m": 190.0,
   "start_elevation_m": 118.77568880455931,
   "end_elevation_m": 138.84518937209702,
   "start_xy": [
    567073.8458852146,
    6419020.061444371
   ],
   "end_xy": [
    567003.4468860378,
    6419083.14449522
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -2.444236406166169,
   "start_distance_m": 657.0,
   "end_distance_m": 662.0,
   "midpoint_distance_m": 659.5,
   "start_elevation_m": 164.46425871018204,
   "end_elevation_m": 164.34204688987373,
   "start_xy": [
    566833.0456406972,
    6419101.025321298
   ],
   "end_xy": [
    566833.8839581454,
    6419105.9545427235
   ]
  },
  "min_10m": {
   "gradient_pct": -1.409606770627363,
   "start_distance_m": 653.0,
   "end_distance_m": 663.0,
   "midpoint_distance_m": 658.0,
   "start_elevation_m": 164.47868478717766,
   "end_elevation_m": 164.33772411011492,
   "start_xy": [
    566832.3749867388,
    6419097.081944158
   ],
   "end_xy": [
    566834.051621635,
    6419106.940387009
   ]
  },
  "min_20m": {
   "gradient_pct": -0.17718309151590006,
   "start_distance_m": 645.0,
   "end_distance_m": 665.0,
   "midpoint_distance_m": 655.0,
   "start_elevation_m": 164.49548860183586,
   "end_elevation_m": 164.46005198353268,
   "start_xy": [
    566831.0336788218,
    6419089.195189878
   ],
   "end_xy": [
    566834.3869486143,
    6419108.912075578
   ]
  },
  "min_25m": {
   "gradient_pct": 0.1940759845890625,
   "start_distance_m": 470.0,
   "end_distance_m": 495.0,
   "midpoint_distance_m": 482.5,
   "start_elevation_m": 158.37084675526876,
   "end_elevation_m": 158.41936575141602,
   "start_xy": [
    566918.3032066604,
    6418938.518440154
   ],
   "end_xy": [
    566903.4021712698,
    6418958.592282444
   ]
  },
  "min_50m": {
   "gradient_pct": 0.4027120029268758,
   "start_distance_m": 461.0,
   "end_distance_m": 511.0,
   "midpoint_distance_m": 486.0,
   "start_elevation_m": 158.2907006405407,
   "end_elevation_m": 158.49205664200414,
   "start_xy": [
    566923.4872709283,
    6418933.75456785
   ],
   "end_xy": [
    566893.8655086198,
    6418971.43954151
   ]
  },
  "min_100m": {
   "gradient_pct": 1.9625939348351835,
   "start_distance_m": 441.0,
   "end_distance_m": 541.0,
   "midpoint_distance_m": 491.0,
   "start_elevation_m": 157.31057119595079,
   "end_elevation_m": 159.27316513078597,
   "start_xy": [
    566932.941971262,
    6418951.378660496
   ],
   "end_xy": [
    566876.7250331051,
    6418996.030559935
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 32.147287244114864,
   "start_distance_m": 217.0,
   "end_distance_m": 219.0,
   "midpoint_distance_m": 218.0,
   "start_elevation_m": 134.7524592629108,
   "end_elevation_m": 135.3954050077931,
   "start_xy": [
    567020.9795179975,
    6419071.790033792
   ],
   "end_xy": [
    567020.5591313307,
    6419073.7453534715
   ]
  },
  "max_3m": {
   "gradient_pct": 30.092161804099266,
   "start_distance_m": 142.0,
   "end_distance_m": 145.0,
   "midpoint_distance_m": 143.5,
   "start_elevation_m": 119.244099048925,
   "end_elevation_m": 120.14686390304797,
   "start_xy": [
    567072.123546938,
    6419021.078081406
   ],
   "end_xy": [
    567069.5400395229,
    6419022.603036959
   ]
  }
 },
 "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": 0.29,
   "obstruction_max_height_m": 17.24,
   "flagged_windows_m": [
    2,
    3,
    5,
    20,
    25,
    50,
    100
   ]
  },
  "review": [],
  "extent": []
 },
 "provenance": {
  "analysis_version": "0.1.0",
  "run_manifest": {
   "manifest_version": "1",
   "code_git_sha": "16bcc1553fe58b280e0c4a66a3ab0980530490a6",
   "code_git_dirty": "false",
   "analysis_version": "0.1.0",
   "analysis_config_digest": "sha256:8c94015b54267da4",
   "python": "3.14.4",
   "numpy": "2.5.3",
   "rasterio": "1.5.1",
   "pyproj": "3.8.0",
   "laspy": "2.7.0",
   "shapely": "2.1.2",
   "pyosmium": "4.3.1",
   "libosmium": "2.23.1",
   "gdal": "3.12.4",
   "proj": "9.8.1",
   "run_id": "fr-so8",
   "road_pbf": "block-batch-fr-so8.osm.pbf",
   "region_key": "france",
   "crs": "EPSG:2154",
   "elevation_provider_key": "ign-lidarhd",
   "tile_index": "wms-grid",
   "authority": "bdtopo",
   "registry_pbf": "france-vosges-2026-09-16.osm.pbf",
   "tile_index_snapshot": "sha256:18f786cf9fa98070"
  },
  "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:2154",
  "elevation_resolution_m": 0.5,
  "elevation_tiles": [
   "data/cache/fr/ign-lidarhd_dtm_E566-N6418_0m5@21LHD2IN-2025-03-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E566-N6419_0m5@21LHD2IN-2025-03-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E567-N6418_0m5@21LHD2IN-2025-03-14.tif",
   "data/cache/fr/ign-lidarhd_dtm_E567-N6419_0m5@21LHD2IN-2025-03-14.tif"
  ],
  "calculated_at": "2026-09-27T05:42:06+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/block-batch-fr-so8.osm.pbf",
  "osm_snapshot": "",
  "run_id": "fr-so8",
  "elevation_provider": "IGN LiDAR HD MNT 0.5 m",
  "elevation_licence": "Licence Ouverte / Open Licence 2.0 (Etalab) \u2014 \u00a9 IGN, LiDAR HD (MNT/MNS), data.geopf.fr; reproduction autoris\u00e9e avec mention de la source et de la date",
  "elevation_dataset": "LiDAR HD \u2014 MNT (sol) et MNS (surface), 0,50 m (Institut national de l'information g\u00e9ographique et foresti\u00e8re), RGF93 / Lambert-93 EPSG:2154, altitudes IGN69",
  "elevation_vertical_datum": "IGN69",
  "elevation_tile_ids": [
   "E566-N6418",
   "E566-N6419",
   "E567-N6418",
   "E567-N6419"
  ],
  "elevation_blocks": [
   "21LHD2IN@2025-03-14"
  ],
  "ign_dalles": [
   "LHD_FXX_0566_6419_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0566_6420_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0567_6419_MNT_O_0M50_LAMB93_IGN69",
   "LHD_FXX_0567_6420_MNT_O_0M50_LAMB93_IGN69"
  ],
  "ign_missions": [
   "21LHD2IN"
  ],
  "ign_editions": [
   "2025-03-14"
  ],
  "ign_dsm_edition": {
   "LHD_FXX_0566_6419_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0566_6420_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0567_6419_MNT_O_0M50_LAMB93_IGN69": "2025-03-14",
   "LHD_FXX_0567_6420_MNT_O_0M50_LAMB93_IGN69": "2025-03-14"
  },
  "climb_origin": "discovered",
  "seam_filled_samples": {
   "count": 0,
   "distances_m": []
  },
  "seam_filled_in_maximum": false,
  "structure_own_ways": "none \u2014 the route carried no way list and no mapped way runs along it; own decks unmasked",
  "carriageway": {
   "stations": 34,
   "stations_resolved": 34,
   "width_median_m": 5.12,
   "width_p10_m": 2.58,
   "width_min_m": 1.0,
   "width_max_m": 11.0,
   "bounded_share": 0.294,
   "unbounded_share": 0.706,
   "confidence_median": 0.0,
   "width_median_bounded_m": 3.38,
   "window_m": [
    184.0,
    209.0
   ],
   "width_at_max25_m": 4.5,
   "window_stations": 7,
   "single_track": false,
   "single_track_rule": "PROVISIONAL (2026-09-15): width_p10_m <= 3.0 m with bounded_share >= 0.6; recorded, not a rule",
   "status": "ok",
   "source": "dtm",
   "station_m": 25.0,
   "window_station_m": 5.0,
   "halfwidth_m": 6.0,
   "step_m": 0.25,
   "level_tol_m": 0.12,
   "break_min_m": 0.3,
   "stations_failed": 0,
   "hedge_to_hedge": {
    "stations": 34,
    "stations_resolved": 34,
    "width_median_m": 3.0,
    "width_p10_m": 1.0,
    "width_min_m": 0.5,
    "width_max_m": 12.0,
    "bounded_share": 0.853,
    "unbounded_share": 0.147,
    "confidence_median": 1.0,
    "width_median_bounded_m": 2.75,
    "window_m": [
     184.0,
     209.0
    ],
    "width_at_max25_m": 3.0,
    "window_stations": 7,
    "status": "ok",
    "source": "dsm",
    "station_m": 25.0,
    "window_station_m": 5.0,
    "halfwidth_m": 6.0,
    "step_m": 0.25,
    "level_tol_m": 0.5,
    "break_min_m": 0.3,
    "stations_failed": 0
   }
  },
  "license": "ODbL-1.0",
  "license_url": "https://howsteep.org/licensing"
 },
 "area": {
  "place": "Calviac-en-P\u00e9rigord",
  "county": "Dordogne",
  "source": "OpenStreetMap administrative boundaries (\u00a9 OpenStreetMap contributors, ODbL)"
 }
}