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simplify postcode area for lookups

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Sarah Hoffmann
2025-12-23 23:24:33 +01:00
parent 3bcd1aa721
commit f2110e12d6
1 changed files with 2 additions and 1 deletions
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3
src/nominatim_db/tools/postcodes.py
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@@ -269,7 +269,8 @@ def _update_guessed_postcode(conn: Connection, analyzer: AbstractAnalyzer,
with conn.cursor() as cur: with conn.cursor() as cur:
cur.execute("DROP TABLE IF EXISTS _global_postcode_area") cur.execute("DROP TABLE IF EXISTS _global_postcode_area")
cur.execute("""CREATE TABLE _global_postcode_area AS cur.execute("""CREATE TABLE _global_postcode_area AS
(SELECT ST_SubDivide(ST_Union(geometry)) as geometry (SELECT ST_SubDivide(ST_SimplifyPreserveTopology(
ST_Union(geometry), 0.00001), 128) as geometry
FROM place_postcode WHERE geometry is not null) FROM place_postcode WHERE geometry is not null)
""") """)
cur.execute("CREATE INDEX ON _global_postcode_area USING gist(geometry)") cur.execute("CREATE INDEX ON _global_postcode_area USING gist(geometry)")