X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/cf98cff2a166eb35ed2c946e03f1610069bdd1d4..6dbec931f58c659075a903db1e8eab15b1c93b03:/nominatim/tools/postcodes.py diff --git a/nominatim/tools/postcodes.py b/nominatim/tools/postcodes.py index 3f8f4e38..9c66719b 100644 --- a/nominatim/tools/postcodes.py +++ b/nominatim/tools/postcodes.py @@ -1,15 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# This file is part of Nominatim. (https://nominatim.org) +# +# Copyright (C) 2022 by the Nominatim developer community. +# For a full list of authors see the git log. """ Functions for importing, updating and otherwise maintaining the table of artificial postcode centroids. """ +from collections import defaultdict import csv import gzip import logging from math import isfinite -from psycopg2.extras import execute_values +from psycopg2 import sql as pysql from nominatim.db.connection import connect +from nominatim.utils.centroid import PointsCentroid +from nominatim.data.postcode_format import PostcodeFormatter LOG = logging.getLogger() @@ -24,20 +33,31 @@ def _to_float(num, max_value): return num -class _CountryPostcodesCollector: +class _PostcodeCollector: """ Collector for postcodes of a single country. """ - def __init__(self, country): + def __init__(self, country, matcher): self.country = country - self.collected = dict() + self.matcher = matcher + self.collected = defaultdict(PointsCentroid) + self.normalization_cache = None def add(self, postcode, x, y): """ Add the given postcode to the collection cache. If the postcode already existed, it is overwritten with the new centroid. """ - self.collected[postcode] = (x, y) + if self.matcher is not None: + if self.normalization_cache and self.normalization_cache[0] == postcode: + normalized = self.normalization_cache[1] + else: + match = self.matcher.match(postcode) + normalized = self.matcher.normalize(match) if match else None + self.normalization_cache = (postcode, normalized) + + if normalized: + self.collected[normalized] += (x, y) def commit(self, conn, analyzer, project_dir): @@ -52,27 +72,26 @@ class _CountryPostcodesCollector: with conn.cursor() as cur: if to_add: - execute_values(cur, - """INSERT INTO location_postcode - (place_id, indexed_status, country_code, - postcode, geometry) VALUES %s""", - to_add, - template="""(nextval('seq_place'), 1, '{}', - %s, 'SRID=4326;POINT(%s %s)') - """.format(self.country)) + cur.execute_values( + """INSERT INTO location_postcode + (place_id, indexed_status, country_code, + postcode, geometry) VALUES %s""", + to_add, + template=pysql.SQL("""(nextval('seq_place'), 1, {}, + %s, 'SRID=4326;POINT(%s %s)') + """).format(pysql.Literal(self.country))) if to_delete: cur.execute("""DELETE FROM location_postcode WHERE country_code = %s and postcode = any(%s) """, (self.country, to_delete)) if to_update: - execute_values(cur, - """UPDATE location_postcode - SET indexed_status = 2, - geometry = ST_SetSRID(ST_Point(v.x, v.y), 4326) - FROM (VALUES %s) AS v (pc, x, y) - WHERE country_code = '{}' and postcode = pc - """.format(self.country), - to_update) + cur.execute_values( + pysql.SQL("""UPDATE location_postcode + SET indexed_status = 2, + geometry = ST_SetSRID(ST_Point(v.x, v.y), 4326) + FROM (VALUES %s) AS v (pc, x, y) + WHERE country_code = {} and postcode = pc + """).format(pysql.Literal(self.country)), to_update) def _compute_changes(self, conn): @@ -88,16 +107,16 @@ class _CountryPostcodesCollector: WHERE country_code = %s""", (self.country, )) for postcode, x, y in cur: - newx, newy = self.collected.pop(postcode, (None, None)) - if newx is not None: - dist = (x - newx)**2 + (y - newy)**2 - if dist > 0.0000001: + pcobj = self.collected.pop(postcode, None) + if pcobj: + newx, newy = pcobj.centroid() + if (x - newx) > 0.0000001 or (y - newy) > 0.0000001: to_update.append((postcode, newx, newy)) else: to_delete.append(postcode) - to_add = [(k, v[0], v[1]) for k, v in self.collected.items()] - self.collected = [] + to_add = [(k, *v.centroid()) for k, v in self.collected.items()] + self.collected = None return to_add, to_delete, to_update @@ -120,8 +139,10 @@ class _CountryPostcodesCollector: postcode = analyzer.normalize_postcode(row['postcode']) if postcode not in self.collected: try: - self.collected[postcode] = (_to_float(row['lon'], 180), - _to_float(row['lat'], 90)) + # Do float conversation separately, it might throw + centroid = (_to_float(row['lon'], 180), + _to_float(row['lat'], 90)) + self.collected[postcode] += centroid except ValueError: LOG.warning("Bad coordinates %s, %s in %s country postcode file.", row['lat'], row['lon'], self.country) @@ -131,13 +152,13 @@ class _CountryPostcodesCollector: def _open_external(self, project_dir): - fname = project_dir / '{}_postcodes.csv'.format(self.country) + fname = project_dir / f'{self.country}_postcodes.csv' if fname.is_file(): LOG.info("Using external postcode file '%s'.", fname) - return open(fname, 'r') + return open(fname, 'r', encoding='utf-8') - fname = project_dir / '{}_postcodes.csv.gz'.format(self.country) + fname = project_dir / f'{self.country}_postcodes.csv.gz' if fname.is_file(): LOG.info("Using external postcode file '%s'.", fname) @@ -153,6 +174,7 @@ def update_postcodes(dsn, project_dir, tokenizer): potentially enhances it with external data and then updates the postcodes in the table 'location_postcode'. """ + matcher = PostcodeFormatter() with tokenizer.name_analyzer() as analyzer: with connect(dsn) as conn: # First get the list of countries that currently have postcodes. @@ -164,19 +186,17 @@ def update_postcodes(dsn, project_dir, tokenizer): # Recompute the list of valid postcodes from placex. with conn.cursor(name="placex_postcodes") as cur: cur.execute(""" - SELECT cc as country_code, pc, ST_X(centroid), ST_Y(centroid) + SELECT cc, pc, ST_X(centroid), ST_Y(centroid) FROM (SELECT COALESCE(plx.country_code, get_country_code(ST_Centroid(pl.geometry))) as cc, - token_normalized_postcode(pl.address->'postcode') as pc, - ST_Centroid(ST_Collect(COALESCE(plx.centroid, - ST_Centroid(pl.geometry)))) as centroid + pl.address->'postcode' as pc, + COALESCE(plx.centroid, ST_Centroid(pl.geometry)) as centroid FROM place AS pl LEFT OUTER JOIN placex AS plx ON pl.osm_id = plx.osm_id AND pl.osm_type = plx.osm_type - WHERE pl.address ? 'postcode' AND pl.geometry IS NOT null - GROUP BY cc, pc) xx + WHERE pl.address ? 'postcode' AND pl.geometry IS NOT null) xx WHERE pc IS NOT null AND cc IS NOT null - ORDER BY country_code, pc""") + ORDER BY cc, pc""") collector = None @@ -184,7 +204,7 @@ def update_postcodes(dsn, project_dir, tokenizer): if collector is None or country != collector.country: if collector is not None: collector.commit(conn, analyzer, project_dir) - collector = _CountryPostcodesCollector(country) + collector = _PostcodeCollector(country, matcher.get_matcher(country)) todo_countries.discard(country) collector.add(postcode, x, y) @@ -193,7 +213,8 @@ def update_postcodes(dsn, project_dir, tokenizer): # Now handle any countries that are only in the postcode table. for country in todo_countries: - _CountryPostcodesCollector(country).commit(conn, analyzer, project_dir) + fmt = matcher.get_matcher(country) + _PostcodeCollector(country, fmt).commit(conn, analyzer, project_dir) conn.commit()