Add bus whitelist, route exclusions, crow-fly shape filter, and KML export
- modes.yaml: bus_whitelist (A-buses + selected refs) and exclude list (Snälltåget 083 night train — sparse crow-fly stubs) - prepare.py: drop degenerate crow-fly shapes below 0.05 pts/km; apply bus whitelist and route exclusions from modes.yaml - export_google_mymaps.py: new script — master.gpkg -> KML for Google My Maps import (stops, routes, boundary, coastline layers) - coastline.kml: reference coastline layer for the KML export - .gitignore: also ignore generated output/*.kml
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marvin
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#!/usr/bin/env python3
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"""Export the master GeoPackage to a Google My Maps-importable KML.
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Reads (from data/processed): master.gpkg (lines, stops, stations), area.gpkg
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Read (from config): coastline.kml — the coastline layer extracted verbatim
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from the reference map
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(https://www.google.com/maps/d/u/0/kml?mid=17T6ZDYbGz72h_eteL-CxdkiaXcgDLEA&forcekml=1)
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Writes: output/copenhagen-mymaps.kml
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My Maps turns each top-level KML Folder into a layer on import. We emit:
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Bus stops / Bus routes
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Train stations / Train routes (metro + S-tog + light rail + regional)
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Ferry stops / Ferry routes
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City Pass boundary (outline + faint fill)
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Coastline (verbatim from the reference map's layer)
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Colours match the PNG map: routes use colour_final from prepare.py; stop
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icons use styling.yaml palette defaults (train stations match the reference
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map's red pin). Import manually in Google My Maps:
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Create map → Import → upload the .kml.
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"""
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import re
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import sys
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import xml.etree.ElementTree as ET
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import geopandas as gpd
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import yaml
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from _common import CONFIG, OUTPUT, PROCESSED
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KML = "http://www.opengis.net/kml/2.2"
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ET.register_namespace("", KML)
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# My Maps stock pin (same as the reference map uses); tinted via IconStyle.
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ICON_HREF = "https://www.gstatic.com/mapspro/images/stock/503-wht-blank_maps.png"
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ICON_SCALE = 1.0
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TRAIN_STATION_COLOR = "#C2185B" # reference map's station-pin red
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TRAIN_STYLES = ["metro", "s_tog", "light_rail", "regional"]
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# route line widths in pixels, per style
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LINE_WIDTH = {
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"metro": 4.5,
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"s_tog": 4.25,
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"light_rail": 4.25,
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"regional": 3.5,
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"ferry": 3.75,
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"bus": 2.75,
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}
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BOUNDARY_COLOR = "#006064"
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BOUNDARY_LINE_WIDTH = 3.0
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BOUNDARY_FILL_ALPHA = 0x54 # ~33 %
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class Styles:
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"""Registry of unique (kind, color, width) -> KML <Style> ids."""
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def __init__(self):
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self._map = {}
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def get(self, kind, color_hex, width=0.0):
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key = (kind, color_hex, width)
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if key not in self._map:
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self._map[key] = f"s{len(self._map):03d}"
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return self._map[key]
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def elements(self):
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"""Yield <Style> elements for everything registered so far."""
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by_id = sorted(self._map.items(), key=lambda kv: kv[1])
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for (kind, color_hex, width), sid in by_id:
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st = ET.Element(f"{{{KML}}}Style", id=sid)
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if kind == "icon":
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el = ET.SubElement(st, f"{{{KML}}}IconStyle")
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el.append(_tex("color", kml_color(color_hex)))
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el.append(_tex("scale", str(ICON_SCALE)))
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icon = ET.SubElement(el, f"{{{KML}}}Icon")
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icon.append(_tex("href", ICON_HREF))
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else:
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el = ET.SubElement(st, f"{{{KML}}}LineStyle")
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el.append(_tex("color", kml_color(color_hex)))
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el.append(_tex("width", str(width)))
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if kind == "poly":
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poly = ET.SubElement(st, f"{{{KML}}}PolyStyle")
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poly.append(_tex("color", kml_color(color_hex, BOUNDARY_FILL_ALPHA)))
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balloon = ET.SubElement(st, f"{{{KML}}}BalloonStyle")
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balloon.append(_tex("text", "<h3>$[name]</h3>"))
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yield st
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def _tex(tag, value):
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el = ET.Element(f"{{{KML}}}{tag}")
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el.text = value
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return el
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def kml_color(hex_color, alpha=0xFF):
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"""#RRGGBB -> KML AABBGGRR."""
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h = hex_color.lstrip("#")
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return f"{alpha:02x}{h[4:6]}{h[2:4]}{h[0:2]}"
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def placemark(folder_el, name, sid, geom_el):
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pm = ET.SubElement(folder_el, f"{{{KML}}}Placemark")
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pm.append(_tex("name", str(name)))
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pm.append(_tex("styleUrl", f"#{sid}"))
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pm.append(geom_el)
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def point_el(geom):
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pt = ET.Element(f"{{{KML}}}Point")
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pt.append(_tex("coordinates", f"{geom.x:.7f},{geom.y:.7f}"))
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return pt
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def linestring_el(geom):
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ls = ET.Element(f"{{{KML}}}LineString")
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ls.append(_tex("tessellate", "1"))
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ls.append(_tex("coordinates", " ".join(f"{x:.7f},{y:.7f}" for x, y in geom.coords)))
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return ls
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def polygon_el(geom):
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pg = ET.Element(f"{{{KML}}}Polygon")
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pg.append(_tex("tessellate", "1"))
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outer = ET.SubElement(pg, f"{{{KML}}}outerBoundaryIs")
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ring = ET.SubElement(outer, f"{{{KML}}}LinearRing")
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ring.append(_tex("coordinates", " ".join(f"{x:.7f},{y:.7f}" for x, y in geom.exterior.coords)))
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for inner in geom.interiors:
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b = ET.SubElement(pg, f"{{{KML}}}innerBoundaryIs")
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ring = ET.SubElement(b, f"{{{KML}}}LinearRing")
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ring.append(_tex("coordinates", " ".join(f"{x:.7f},{y:.7f}" for x, y in inner.coords)))
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return pg
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def multi_el(geom, single):
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"""Wrap (Multi)Geometry into a KML element (MultiGeometry if needed)."""
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geoms = list(getattr(geom, "geoms", [geom]))
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if len(geoms) == 1:
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return single(geoms[0])
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mg = ET.Element(f"{{{KML}}}MultiGeometry")
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for g in geoms:
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mg.append(single(g))
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return mg
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def add_folder(document, name):
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f = ET.SubElement(document, f"{{{KML}}}Folder")
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f.append(_tex("name", name))
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return f
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def add_stops_folder(document, name, gdf, tint, styles):
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f = add_folder(document, name)
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sid = styles.get("icon", tint)
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for _, row in gdf.sort_values("name").iterrows():
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placemark(f, row["name"], sid, point_el(row.geometry))
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return len(gdf)
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def add_routes_folder(document, name, gdf, styles):
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f = add_folder(document, name)
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for _, row in gdf.iterrows():
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sid = styles.get("line", row["colour_final"], LINE_WIDTH[row["style"]])
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placemark(f, f'{row["ref"]} {row["name"]}', sid, multi_el(row.geometry, linestring_el))
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return len(gdf)
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def add_boundary_folder(document, area_geom, styles):
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f = add_folder(document, "City Pass boundary")
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sid = styles.get("poly", BOUNDARY_COLOR, BOUNDARY_LINE_WIDTH)
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placemark(f, "City Pass boundary", sid, multi_el(area_geom, polygon_el))
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return 1
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def append_coastline(document):
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"""Append the verbatim coastline layer stored in config/coastline.kml."""
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src = ET.parse(CONFIG / "coastline.kml").getroot().find(f"{{{KML}}}Document")
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n = 0
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for el in src:
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if el.tag == f"{{{KML}}}Folder":
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document.append(el)
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n = len(el.findall(f"{{{KML}}}Placemark"))
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elif el.tag in (f"{{{KML}}}Style", f"{{{KML}}}StyleMap"):
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document.append(el)
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return n
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def natural_key(ref):
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return tuple(int(t) if t.isdigit() else t for t in re.split(r"(\d+)", str(ref)))
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def main():
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lines = gpd.read_file(PROCESSED / "master.gpkg", layer="lines")
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stops = gpd.read_file(PROCESSED / "master.gpkg", layer="stops")
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stations = gpd.read_file(PROCESSED / "master.gpkg", layer="stations")
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area = gpd.read_file(PROCESSED / "area.gpkg").geometry.union_all()
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styling = yaml.safe_load((CONFIG / "styling.yaml").read_text())
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palette = styling["palette"]
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kml = ET.Element(f"{{{KML}}}kml")
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document = ET.SubElement(kml, f"{{{KML}}}Document")
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document.append(_tex("name", "Kurragömma Köpenhamn"))
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styles = Styles()
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counts = {}
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counts["Bus stops"] = add_stops_folder(
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document, "Bus stops", stops[stops["style"] == "bus"],
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palette["bus"]["default"], styles,
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)
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bus_lines = lines[lines["style"] == "bus"].copy()
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bus_lines["_k"] = bus_lines["ref"].map(natural_key)
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counts["Bus routes"] = add_routes_folder(
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document, "Bus routes", bus_lines.sort_values("_k"), styles
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)
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counts["Train stations"] = add_stops_folder(
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document, "Train stations", stations, TRAIN_STATION_COLOR, styles
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)
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train = lines[lines["style"].isin(TRAIN_STYLES)].copy()
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train["_order"] = train["style"].map(TRAIN_STYLES.index)
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train["_k"] = train["ref"].map(natural_key)
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counts["Train routes"] = add_routes_folder(
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document, "Train routes", train.sort_values(["_order", "_k"]), styles
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)
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counts["Ferry stops"] = add_stops_folder(
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document, "Ferry stops", stops[stops["style"] == "ferry"],
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palette["ferry"]["default"], styles,
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)
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ferry_lines = lines[lines["style"] == "ferry"].sort_values("ref")
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counts["Ferry routes"] = add_routes_folder(document, "Ferry routes", ferry_lines, styles)
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counts["City Pass boundary"] = add_boundary_folder(document, area, styles)
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counts["Coastline"] = append_coastline(document)
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# <Style> elements belong before the first <Folder> (KML resolves style
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# ids regardless of order; this is conventional + nicer on the eyes).
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insert_at = list(document).index(document.find(f"{{{KML}}}name")) + 1
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for offset, st in enumerate(styles.elements()):
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document.insert(insert_at + offset, st)
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out = OUTPUT / "copenhagen-mymaps.kml"
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tree = ET.ElementTree(kml)
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ET.indent(tree, space=" ")
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tree.write(out, encoding="utf-8", xml_declaration=True)
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print(f"wrote {out}")
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for n, c in counts.items():
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print(f" {n}: {c} placemarks")
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if __name__ == "__main__":
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main()
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