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Constitution Hill

347.9 m · gain 60.6 m · overall 17.4% · Mount Pleasant · Abertawe - Swansea

Shape: sustained — 30% of the climbing sits in a quarter of the distance; longest continuous stretch at 10%+ is 287 m.

Known from: Wikipedia — Constitution Hill, Swansea — has its own article.

Gradient ladder what do windows mean?

Window	Maximum	Located at
2 m (diagnostic)	24.2%	309–311 m
3 m (diagnostic)	23.8%	309–312 m
5 m	23.1%	309–314 m
10 m	22.3%	307–317 m
20 m	21.9%	161–181 m
25 m	21.9%	309–334 m
50 m	21.6%	297–347 m
100 m	21.2%	81–181 m

may_continue_beyond_end Extent detection suggests reviewing where this climb starts/ends.

Map

Check this route yourself: Google Maps route via their router · Street View at the base where coverage exists · geojson.io our exact measured line · OpenTopoMap

Constitution Hill LiDAR hillshade map with contours

Profile

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_21_264193_20220113dtm.tif"
  ],
  "calculated_at": "2026-08-12T09:06:25+00:00",
  "road_source": "OpenStreetMap (local PBF extract)",
  "road_attribution": "\u00a9 OpenStreetMap contributors, ODbL",
  "osm_pbf_path": "data/cache/pbf/wales-2026-08-11.osm.pbf",
  "osm_snapshot": "2026-08-10T20:21:40Z",
  "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_21_264193_20220113dtm.tif"
  ],
  "elevation_capture_dates": [
    "13-01-2022"
  ],
  "climb_origin": "discovered",
  "notes": "Coarse pass: max 19.6% over 200 m (Terrain 50), gain 52.4 m over 266 m way. EXTENDED by graph walk: +2 segment(s) at base, +0 at top (stop: base=no_descending_continuation, top=no_ascending_continuation; min_avg=2.0%). Review before adopting. ADOPTED (notable slice 2026-08-11): clean-steep."
}