More

pipeline/transform/postcode_boundaries/__main__.py

@@ -32,6 +32,12 @@ def main() -> None:
     parser.add_argument(
         "--limit", type=int, default=0, help="Process only first N OAs (0=all)"
     )
+    parser.add_argument(
+        "--greenspace",
+        type=Path,
+        default=None,
+        help="Greenspace/water parquet for boundary trimming (optional)",
+    )
     args = parser.parse_args()
 
     # Phase 1: Load all data
@@ -115,7 +121,20 @@ def main() -> None:
     print("Phase 4: Merging fragments and writing GeoJSON")
     print("=" * 60)
 
-    merged = merge_fragments(all_fragments)
+    greenspace_tree = None
+    greenspace_geoms = None
+    if args.greenspace and args.greenspace.exists():
+        from .greenspace import load_greenspace
+
+        print(f"  Loading greenspace/water from {args.greenspace}...")
+        greenspace_tree, greenspace_geoms = load_greenspace(args.greenspace)
+        print(f"  Loaded {len(greenspace_geoms)} greenspace/water polygons")
+
+    merged = merge_fragments(
+        all_fragments,
+        greenspace_tree=greenspace_tree,
+        greenspace_geoms=greenspace_geoms,
+    )
     print(f"  Merged into {len(merged)} unique postcodes")
 
     file_count = write_district_geojson(merged, args.output)