First commit

scripts/overlay/cities2-geojson-generate.py

@@ -0,0 +1,31 @@
+import geopandas as gpd
+
+# --- Input shapefile ---
+shapefile_path = "ne_10m_populated_places.shp"
+output_geojson = "world_cities_europe_clean.geojson"
+
+# --- Load cities shapefile ---
+cities = gpd.read_file(shapefile_path)
+
+# --- Filter Europe + Nordics ---
+europe_iso3 = [
+    'AUT','BEL','CHE','DEU','DNK','ESP','FIN','FRA',
+    'GBR','ITA','NOR','NLD','SWE','ISL','IRL','LUX'
+]
+cities = cities[cities['ADM0_A3'].isin(europe_iso3)]
+
+# --- Ensure columns ---
+if 'POP_MAX' not in cities.columns:
+    cities['POP_MAX'] = 0
+else:
+    cities['POP_MAX'] = cities['POP_MAX'].fillna(0).astype(int)
+
+cities = cities[['NAME','POP_MAX','geometry']]
+
+# --- Remove empty geometries ---
+cities = cities[~cities['geometry'].is_empty]
+
+# --- Save to GeoJSON ---
+cities.to_file(output_geojson, driver="GeoJSON")
+print(f"[+] Saved {len(cities)} cities to {output_geojson}")
+