Source Copenhagen transit data from Rejseplanen GTFS

- Replace OSM Overpass transit data with the Rejseplanen GTFS feed
  (routes keyed by (agency, short name); styles from modes.yaml)
- Draw one shape per (style, ref, direction), choosing the shape that
  serves the most in-area stops so lines pass the stops we show
- Collapse stops by names (verified unambiguous); prune stops whose
  serving refs have no drawn line within 300 m
- Patch Københavns Havn + Nordhavn into the area polygon so ferry
  routes and sub-harbour metro tunnels survive clipping; 100 m buffer
  closes relation boundary slivers
- Drop OSM download pipeline; keep tiled basemap

copenhagen/config/modes.yaml

@@ -1,40 +1,34 @@
-# Mapping of map modes to OSM route filters, GTFS route types, and style keys.
-# `style` references a key in styling.yaml.
+# Mapping of map styles to GTFS agency / route_type filters.
 #
-# OSM filter keys map directly to Overpass tag filters. A key suffixed with
-# `_neq` emits a negated tag filter (["k"!="v"]); any other key emits an
-# equality filter (["k"="v"]). The bbox is appended by download_osm.py.
+# Used by prepare.py to classify GTFS routes (lines layer) and the routes
+# serving each stop pole (stops/stations layers). Style keys are referenced
+# by styling.yaml (palette, zorder, widths).
 #
-# S-tog are tagged route=light_rail in OSM (NOT route=train); they are scoped
-# by network="Takst Sjælland". The separate `light_rail` mode catches other
-# light rail (e.g. Hovedstadens Letbane, opened Aug 2026) via network!=Takst.
-# GTFS route_type: 0=tram,1=subway,2=rail,3=bus,4=ferry.
+# `agencies` matches GTFS agency_name from agency.txt.
+# `route_types` optionally restricts GTFS route_type values, including the
+# extended codes used in this feed (109 = S-tog suburban rail, 700/715 =
+# Movia bus service types). Without `route_types`, all of the agency's
+# routes match (e.g. Movia including harbour ferries 991/992).
+#
+# ORDER MATTERS: the styles listed here are also the priority order when a
+# pole is served by several modes (e.g. S-tog and regional trains share
+# platforms at hub stations — the higher style wins).
 modes:
-  subway:
-    osm:
-      route: subway
-    gtfs_route_type: 1
-    style: metro
+  metro:
+    agencies: [Metroselskabet]
   s_tog:
-    osm:
-      route: light_rail
-      network: "Takst Sjælland"
-    gtfs_route_type: 2
-    style: s_tog
+    agencies: [DSB S-tog]
+    route_types: [109, 2]
   light_rail:
-    osm:
-      route: light_rail
-      network_neq: "Takst Sjælland"
-    gtfs_route_type: 2
-    style: light_rail
+    agencies: [Hovedstadens Letbane]
   regional:
-    osm:
-      route: train
-    gtfs_route_type: 2
-    style: regional
+    agencies: [DSB, Lokaltog A/S, Skånetrafiken, Snälltåget AB, DSB Vores Tog]
+    route_types: [2]
+  ferry:
+    # harbour buses 991/992 (route_type 4); their shapes cross the harbour
+    # water and are intentionally NOT clipped to the land area polygon
+    agencies: [Movia]
+    route_types: [4]
   bus:
-    osm:
-      route: bus
-      network: Movia
-    gtfs_route_type: 3
-    style: bus
+    agencies: [Movia]
+    route_types: [3, 700, 715]