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This commit is contained in:
Andras Schmelczer 2026-07-03 18:28:56 +01:00
parent 909e241907
commit 1ee796b282
29 changed files with 250 additions and 126 deletions
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pipeline/transform/postcode_boundaries/uprn.py
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@ -82,7 +82,7 @@ def load_uprns(
# Remap terminated postcodes to their nearest active successor. The
# successor generally lives in a DIFFERENT OA (and at different grid
# coordinates), so the remapped point must adopt the successor's
# authoritative OA/coords — keeping the terminated postcode's original
# authoritative OA/coords. Keeping the terminated postcode's original
# OA would seed the successor into an OA it doesn't belong to, splitting
# its boundary across OAs. Genuine (non-remapped) UPRN rows keep their
# own OA, since a live postcode can legitimately span several OAs.
@ -127,7 +127,7 @@ def load_uprns(
uprns.sort("OA21CD").sink_parquet(tmp_path)
release_memory()
# Read the sorted data — only one copy in memory (~2GB)
# Read the sorted data: only one copy in memory (~2GB)
df = pl.read_parquet(tmp_path)
tmp_path.unlink()
n = len(df)