kopia lustrzana https://github.com/openmaptiles/openmaptiles
56 wiersze
2.3 KiB
PL/PgSQL
56 wiersze
2.3 KiB
PL/PgSQL
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-- etldoc: layer_city[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_city | <z2_14> z2-z14+" ] ;
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-- etldoc: osm_city_point -> layer_city:z2_14
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CREATE OR REPLACE FUNCTION layer_city(bbox geometry, zoom_level int, pixel_width numeric)
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RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, name_de text, tags hstore, place city_place, "rank" int, capital int) AS $$
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SELECT * FROM (
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SELECT osm_id, geometry, name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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place, "rank", normalize_capital_level(capital) AS capital
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FROM osm_city_point
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WHERE geometry && bbox
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AND ((zoom_level = 2 AND "rank" = 1)
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OR (zoom_level BETWEEN 3 AND 7 AND "rank" <= zoom_level + 1)
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)
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UNION ALL
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SELECT osm_id, geometry, name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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place,
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COALESCE("rank", gridrank + 10),
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normalize_capital_level(capital) AS capital
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FROM (
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SELECT osm_id, geometry, name,
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COALESCE(NULLIF(name_en, ''), name) AS name_en,
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COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
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tags,
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place, "rank", capital,
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row_number() OVER (
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PARTITION BY LabelGrid(geometry, 128 * pixel_width)
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ORDER BY "rank" ASC NULLS LAST,
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place ASC NULLS LAST,
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population DESC NULLS LAST,
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length(name) ASC
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)::int AS gridrank
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FROM osm_city_point
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WHERE geometry && bbox
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AND ((zoom_level = 7 AND place <= 'town'::city_place
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OR (zoom_level BETWEEN 8 AND 10 AND place <= 'village'::city_place)
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OR (zoom_level BETWEEN 11 AND 13 AND place <= 'suburb'::city_place)
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OR (zoom_level >= 14)
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))
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) AS ranked_places
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WHERE (zoom_level BETWEEN 7 AND 8 AND (gridrank <= 4 OR "rank" IS NOT NULL))
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OR (zoom_level = 9 AND (gridrank <= 8 OR "rank" IS NOT NULL))
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OR (zoom_level = 10 AND (gridrank <= 12 OR "rank" IS NOT NULL))
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OR (zoom_level BETWEEN 11 AND 12 AND (gridrank <= 14 OR "rank" IS NOT NULL))
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OR (zoom_level >= 13)
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) as city_all;
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$$ LANGUAGE SQL IMMUTABLE;
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