7e9a6812d7
Closes #1082 This PR moves the aerodrome/aerodrome_type consolidation (via template) into the lower-level `osm_aerodrome_label_point` table, and creates a partial index on class `international` for airports with an `iata` code. The presence of an `iata` code is more significant than an `icao` code which exists at many smaller, general aviation airport. Therefore, `international` + `iata` should be a sufficient filter. Zoom 8 international airports in the NYC area (blue dots):  Zoom 10 in the same area: 
63 lines
2.0 KiB
PL/PgSQL
63 lines
2.0 KiB
PL/PgSQL
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-- etldoc: layer_aerodrome_label[shape=record fillcolor=lightpink, style="rounded,filled", label="layer_aerodrome_label | <z10_> z10+" ] ;
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CREATE OR REPLACE FUNCTION layer_aerodrome_label(bbox geometry,
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zoom_level integer)
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RETURNS TABLE
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(
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id bigint,
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geometry geometry,
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name text,
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name_en text,
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name_de text,
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tags hstore,
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class text,
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iata text,
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icao text,
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ele int,
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ele_ft int
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)
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AS
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$$
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SELECT
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-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z8
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-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z9
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ABS(osm_id) AS id, -- mvt feature IDs can't be negative
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geometry,
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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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aerodrome_type AS class,
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NULLIF(iata, '') AS iata,
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NULLIF(icao, '') AS icao,
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substring(ele FROM E'^(-?\\d+)(\\D|$)')::int AS ele,
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round(substring(ele FROM E'^(-?\\d+)(\\D|$)')::int * 3.2808399)::int AS ele_ft
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FROM osm_aerodrome_label_point
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WHERE geometry && bbox
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AND aerodrome_type = 'international'
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AND iata <> ''
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AND zoom_level BETWEEN 8 AND 9
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UNION ALL
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SELECT
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-- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z10_
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ABS(osm_id) AS id, -- mvt feature IDs can't be negative
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geometry,
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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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aerodrome_type AS class,
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NULLIF(iata, '') AS iata,
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NULLIF(icao, '') AS icao,
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substring(ele FROM E'^(-?\\d+)(\\D|$)')::int AS ele,
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round(substring(ele FROM E'^(-?\\d+)(\\D|$)')::int * 3.2808399)::int AS ele_ft
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FROM osm_aerodrome_label_point
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WHERE geometry && bbox
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AND zoom_level >= 10;
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$$ LANGUAGE SQL STABLE
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-- STRICT
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PARALLEL SAFE;
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