{
 "ocl_version": "0.1.0",
 "name": "May Street",
 "slug": "may-street-2-2",
 "confidence": "A",
 "reported_claims": [],
 "ladder": [
  {
   "window_m": 2.0,
   "max_gradient_pct": 30.1032883532514,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 825.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 300.4673523845471,
   "end_elevation_m": 301.0694181516121,
   "min_gradient_pct": -20.639908413258468
  },
  {
   "window_m": 3.0,
   "max_gradient_pct": 25.684658881194384,
   "diagnostic": true,
   "flags": [],
   "start_distance_m": 823.0,
   "end_distance_m": 826.0,
   "start_elevation_m": 300.0797817488169,
   "end_elevation_m": 300.85032151525274,
   "min_gradient_pct": -18.889921402976977
  },
  {
   "window_m": 5.0,
   "max_gradient_pct": 23.787015337876483,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 822.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 299.8800673847183,
   "end_elevation_m": 301.0694181516121,
   "min_gradient_pct": -16.360106852713443
  },
  {
   "window_m": 10.0,
   "max_gradient_pct": 21.312371217711643,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 808.0,
   "end_distance_m": 818.0,
   "start_elevation_m": 297.28750805972123,
   "end_elevation_m": 299.4187451814924,
   "min_gradient_pct": -12.554834026432218
  },
  {
   "window_m": 20.0,
   "max_gradient_pct": 21.017634014348232,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 799.0,
   "end_distance_m": 819.0,
   "start_elevation_m": 295.37589538828007,
   "end_elevation_m": 299.5794221911497,
   "min_gradient_pct": -10.81097365612294
  },
  {
   "window_m": 25.0,
   "max_gradient_pct": 20.430642982365953,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 802.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 295.96175740602064,
   "end_elevation_m": 301.0694181516121,
   "min_gradient_pct": -10.171002021805862
  },
  {
   "window_m": 50.0,
   "max_gradient_pct": 16.780970753894053,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 777.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 292.6789327746651,
   "end_elevation_m": 301.0694181516121,
   "min_gradient_pct": -7.319449171600581
  },
  {
   "window_m": 100.0,
   "max_gradient_pct": 13.065465235221666,
   "diagnostic": false,
   "flags": [],
   "start_distance_m": 727.0,
   "end_distance_m": 827.0,
   "start_elevation_m": 288.00395291639046,
   "end_elevation_m": 301.0694181516121,
   "min_gradient_pct": -5.978830441192315
  }
 ],
 "shape": {
  "ascent_concentration": 0.418,
  "concentration_window_frac": 0.25,
  "longest_pitch_10pct_m": 72.0,
  "shape_class": "sustained"
 },
 "length_m": 1162.045407302739,
 "start_elevation_m": 262.1942258037187,
 "end_elevation_m": 305.41791417749863,
 "endpoint_gain_m": 43.22368837377991,
 "overall_gradient_pct": 3.719621290368317,
 "accumulated_ascent_m": 56.75885628051611,
 "window_maxima": {
  "max_5m": {
   "gradient_pct": 23.787015337876483,
   "start_distance_m": 822.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 824.5,
   "start_elevation_m": 299.8800673847183,
   "end_elevation_m": 301.0694181516121,
   "start_xy": [
    246663.26565621028,
    4838751.312290183
   ],
   "end_xy": [
    246663.48251090795,
    4838756.3075853735
   ]
  },
  "max_10m": {
   "gradient_pct": 21.312371217711643,
   "start_distance_m": 808.0,
   "end_distance_m": 818.0,
   "midpoint_distance_m": 813.0,
   "start_elevation_m": 297.28750805972123,
   "end_elevation_m": 299.4187451814924,
   "start_xy": [
    246662.6584630568,
    4838737.32546365
   ],
   "end_xy": [
    246663.09217245216,
    4838747.31605403
   ]
  },
  "max_20m": {
   "gradient_pct": 21.017634014348232,
   "start_distance_m": 799.0,
   "end_distance_m": 819.0,
   "midpoint_distance_m": 809.0,
   "start_elevation_m": 295.37589538828007,
   "end_elevation_m": 299.5794221911497,
   "start_xy": [
    246662.26812460102,
    4838728.333932307
   ],
   "end_xy": [
    246663.1355433917,
    4838748.315113069
   ]
  },
  "max_25m": {
   "gradient_pct": 20.430642982365953,
   "start_distance_m": 802.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 814.5,
   "start_elevation_m": 295.96175740602064,
   "end_elevation_m": 301.0694181516121,
   "start_xy": [
    246662.3982374196,
    4838731.331109421
   ],
   "end_xy": [
    246663.48251090795,
    4838756.3075853735
   ]
  },
  "max_50m": {
   "gradient_pct": 16.780970753894053,
   "start_distance_m": 777.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 802.0,
   "start_elevation_m": 292.6789327746651,
   "end_elevation_m": 301.0694181516121,
   "start_xy": [
    246661.25769224143,
    4838706.358033937
   ],
   "end_xy": [
    246663.48251090795,
    4838756.3075853735
   ]
  },
  "max_100m": {
   "gradient_pct": 13.065465235221666,
   "start_distance_m": 727.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 777.0,
   "start_elevation_m": 288.00395291639046,
   "end_elevation_m": 301.0694181516121,
   "start_xy": [
    246657.3951632768,
    4838656.507448484
   ],
   "end_xy": [
    246663.48251090795,
    4838756.3075853735
   ]
  }
 },
 "window_minima": {
  "min_5m": {
   "gradient_pct": -16.360106852713443,
   "start_distance_m": 550.0,
   "end_distance_m": 555.0,
   "midpoint_distance_m": 552.5,
   "start_elevation_m": 290.0821001932871,
   "end_elevation_m": 289.2640948506514,
   "start_xy": [
    246641.78888750088,
    4838480.205660323
   ],
   "end_xy": [
    246642.2616770362,
    4838485.183257138
   ]
  },
  "min_10m": {
   "gradient_pct": -12.554834026432218,
   "start_distance_m": 550.0,
   "end_distance_m": 560.0,
   "midpoint_distance_m": 555.0,
   "start_elevation_m": 290.0821001932871,
   "end_elevation_m": 288.82661679064387,
   "start_xy": [
    246641.78888750088,
    4838480.205660323
   ],
   "end_xy": [
    246642.7344665715,
    4838490.160853953
   ]
  },
  "min_20m": {
   "gradient_pct": -10.81097365612294,
   "start_distance_m": 1105.0,
   "end_distance_m": 1125.0,
   "midpoint_distance_m": 1115.0,
   "start_elevation_m": 308.4165297589908,
   "end_elevation_m": 306.2543350277662,
   "start_xy": [
    246666.1834114398,
    4839033.802085313
   ],
   "end_xy": [
    246660.5274734708,
    4839052.920521695
   ]
  },
  "min_25m": {
   "gradient_pct": -10.171002021805862,
   "start_distance_m": 1105.0,
   "end_distance_m": 1130.0,
   "midpoint_distance_m": 1117.5,
   "start_elevation_m": 308.4165297589908,
   "end_elevation_m": 305.87377925353934,
   "start_xy": [
    246666.1834114398,
    4839033.802085313
   ],
   "end_xy": [
    246658.42145508848,
    4839057.4553520745
   ]
  },
  "min_50m": {
   "gradient_pct": -7.319449171600581,
   "start_distance_m": 539.0,
   "end_distance_m": 589.0,
   "midpoint_distance_m": 564.0,
   "start_elevation_m": 290.64191029864116,
   "end_elevation_m": 286.9821857128409,
   "start_xy": [
    246640.7487505232,
    4838469.25494733
   ],
   "end_xy": [
    246645.4766962765,
    4838519.030910695
   ]
  },
  "min_100m": {
   "gradient_pct": -5.978830441192315,
   "start_distance_m": 497.0,
   "end_distance_m": 597.0,
   "midpoint_distance_m": 547.0,
   "start_elevation_m": 292.64487622917517,
   "end_elevation_m": 286.66604578798285,
   "start_xy": [
    246637.73546001545,
    4838427.367056262
   ],
   "end_xy": [
    246646.23324123496,
    4838526.995057838
   ]
  }
 },
 "diagnostic_window_maxima": {
  "max_2m": {
   "gradient_pct": 30.1032883532514,
   "start_distance_m": 825.0,
   "end_distance_m": 827.0,
   "midpoint_distance_m": 826.0,
   "start_elevation_m": 300.4673523845471,
   "end_elevation_m": 301.0694181516121,
   "start_xy": [
    246663.3957690289,
    4838754.309467297
   ],
   "end_xy": [
    246663.48251090795,
    4838756.3075853735
   ]
  },
  "max_3m": {
   "gradient_pct": 25.684658881194384,
   "start_distance_m": 823.0,
   "end_distance_m": 826.0,
   "midpoint_distance_m": 824.5,
   "start_elevation_m": 300.0797817488169,
   "end_elevation_m": 300.85032151525274,
   "start_xy": [
    246663.30902714984,
    4838752.311349221
   ],
   "end_xy": [
    246663.43913996842,
    4838755.308526335
   ]
  }
 },
 "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": [
   "may_start_earlier"
  ],
  "suggested_summit_cut_m": 951.0,
  "trailing_descent_m": 3.6
 },
 "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/nh/USGS_one_meter_x24y484_NH_CT_RiverNorthL6_2015.tif"
  ],
  "calculated_at": "2026-08-24T20:23:58+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/new-hampshire-260822.osm.pbf",
  "osm_snapshot": "2026-08-21T20:21:11Z",
  "run_id": "redo-nh-6-260824",
  "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, NH_CT_RiverNorthL6_2015 (collected 2015)",
  "elevation_tile_ids": [
   "x24y484"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 10.2% over 200 m (Terrain 50), gain 43.3 m over 1162 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": "Enfield",
  "county": "New Hampshire"
 }
}