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Use platform nodes + route membership for bus stop clustering

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Replaces distance-based clustering with route-membership grouping:
- download_osm.py: collect route_refs per stop node; use platform roles
  for bus stops, stop roles for rail stops
- prepare.py: carry route_refs through to master.gpkg
- render.py: group_by_route_membership() uses union-find to cluster
  same-name stops sharing at least one route into one marker; stops on
  disjoint routes are kept separate. No distance threshold needed.

Results: 786 bus platforms -> 465 markers (was 1610 -> 781).
Veksøvej: 2 platforms sharing routes 2A+5C -> 1 marker.
Peter Bangs Vej: 7 platforms on routes 10/21/22/4A/7A -> 2 markers.
This commit is contained in:
marvin
2026-09-14 00:00:28 +02:00
parent 977a3ffb4c
commit dccf04349a
3 changed files with 106 additions and 29 deletions
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copenhagen/scripts/prepare.py
+1 -1
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@@ -171,7 +171,7 @@ def main():
if stops is not None and not stops.empty:
stops = stops[~stops.geometry.isna() & stops.geometry.is_valid]
stops_clipped = gpd.clip(stops, area_geom)
keep = ["mode", "style", "name", "ref", "public_transport", "railway", "geometry"]
keep = ["mode", "style", "name", "ref", "public_transport", "railway", "route_refs", "geometry"]
for c in keep:
if c not in stops_clipped.columns:
stops_clipped[c] = None