3b4650fca1
This PR introduces simple filtering of duplicate housenumbers. Simple means that filtering is done withing the tile. Duplicates are defined as same housenumber, street, block_number[1]. Duplicates are usually caused by POIs. People like to add addresses to them. Most POIs have names so to prioritize addresses we pick features without names first. Formula is: `row_number() OVER(PARTITION BY concat(street, block_number, housenumber) ORDER BY has_name ASC) == 1`
34 lines
883 B
PL/PgSQL
34 lines
883 B
PL/PgSQL
-- etldoc: layer_housenumber[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_housenumber | <z14_> z14+" ] ;
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CREATE OR REPLACE FUNCTION layer_housenumber(bbox geometry, zoom_level integer)
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RETURNS TABLE
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(
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osm_id bigint,
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geometry geometry,
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housenumber text
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)
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AS
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$$
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SELECT
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-- etldoc: osm_housenumber_point -> layer_housenumber:z14_
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osm_id,
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geometry,
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housenumber
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FROM (
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SELECT
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osm_id,
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geometry,
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housenumber,
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row_number() OVER(PARTITION BY concat(street, block_number, housenumber) ORDER BY has_name ASC) as rn
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FROM osm_housenumber_point
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WHERE 1=1
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AND zoom_level >= 14
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AND geometry && bbox
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) t
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WHERE rn = 1;
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$$ LANGUAGE SQL STABLE
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-- STRICT
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PARALLEL SAFE;
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