37 lines
1.4 KiB
PL/PgSQL
37 lines
1.4 KiB
PL/PgSQL
CREATE OR REPLACE FUNCTION fix_win1252_shp_encoding(str TEXT) RETURNS TEXT
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AS $$
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BEGIN
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RETURN convert_from(convert_to(str, 'WIN1252'), 'UTF-8');
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EXCEPTION WHEN others THEN RETURN str;
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END;
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$$ LANGUAGE plpgsql IMMUTABLE;
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CREATE TABLE IF NOT EXISTS state_label AS (
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SELECT topoint(geom) AS geometry,
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NULL::bigint AS osm_id,
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name_local, fix_win1252_shp_encoding(name) AS name_en,
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abbrev, postal,
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scalerank, labelrank,
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shape_area, datarank, type
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FROM ne_10m_admin_1_states_provinces_shp
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WHERE type IN ('State', 'Avtonomnyy Okrug', 'Sheng', 'Estado')
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AND scalerank <= 3 AND labelrank <= 2
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);
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CREATE INDEX IF NOT EXISTS state_label_geometry_idx ON state_label USING gist(geometry);
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CREATE OR REPLACE FUNCTION layer_state(bbox geometry, zoom_level int)
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RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, abbrev text, postal text, scalerank int, labelrank int) AS $$
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SELECT osm_id, geometry,
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COALESCE(name_local, name_en) AS name, name_en,
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abbrev, postal, scalerank::int, labelrank::int FROM (
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SELECT * FROM state_label
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WHERE (zoom_level = 3)
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AND ((scalerank <= 2 AND labelrank <= 1) OR type = 'Avtonomnyy Okrug')
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UNION ALL
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SELECT * FROM state_label
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WHERE zoom_level >= 4
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) AS t
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WHERE geometry && bbox
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ORDER BY scalerank ASC, labelrank ASC, shape_area DESC;
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$$ LANGUAGE SQL IMMUTABLE;
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