All changes

pipeline/transform/merge.py

@@ -306,7 +306,7 @@ def _build(
         .rename(
             {
                 "date_of_transfer": "Date of last transaction",
-                "construction_age_band": "Construction age",
+                "construction_age_band": "Construction year",
                 "is_construction_date_approximate": "Is construction date approximate",
                 "pp_address": "Address per Property Register",
                 "epc_address": "Address per EPC",

pipeline/transform/postcode_boundaries/voronoi.py

@@ -2,6 +2,7 @@ from collections import defaultdict
 
 import numpy as np
 from scipy.spatial import Voronoi
+from scipy.spatial.qhull import QhullError
 from shapely import make_valid
 from shapely.geometry import MultiPolygon, Polygon
 from shapely.ops import unary_union
@@ -67,7 +68,7 @@ def compute_voronoi_regions(
 
     try:
         vor = Voronoi(all_points)
-    except Exception:
+    except (ValueError, QhullError):
         # Fallback: split boundary equally among all postcodes present
         all_pcs = list(dict.fromkeys(unique_pcs))
         if len(all_pcs) == 1:

pipeline/transform/transform_geosure.py

@@ -8,10 +8,14 @@ Source: Ordnance Survey GeoSure (Open Data)
 """
 
 import argparse
+from pathlib import Path
 
 import numpy as np
 import polars as pl
-from pathlib import Path
+import shapefile as shp
+from pyproj import Transformer
+from shapely import STRtree, points
+from shapely.geometry import shape as to_shapely
 
 _GEOSURE_RISKS = [
     ("CollapsibleDeposits", "collapsible_deposits_risk"),
@@ -25,11 +29,6 @@ _GEOSURE_RISKS = [
 
 def transform(geosure_dir: Path, arcgis_path: Path) -> pl.DataFrame:
     """Spatial-join GeoSure 5km hex grid risk data to postcode centroids."""
-    import shapefile as shp
-    from pyproj import Transformer
-    from shapely import STRtree, points
-    from shapely.geometry import shape as to_shapely
-
     to_wgs84 = Transformer.from_crs("EPSG:27700", "EPSG:4326", always_xy=True)
 
     print("Loading postcode centroids for GeoSure join...")