kopia lustrzana https://github.com/openmaptiles/openmaptiles
99 wiersze
3.7 KiB
PL/PgSQL
99 wiersze
3.7 KiB
PL/PgSQL
-- etldoc: layer_poi[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_poi | <z12> z12 | <z13> z13 | <z14_> z14+" ] ;
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CREATE OR REPLACE FUNCTION layer_poi(bbox geometry, zoom_level integer, pixel_width numeric)
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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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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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subclass text,
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agg_stop integer,
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layer integer,
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level integer,
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indoor integer,
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"rank" int
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)
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AS
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$$
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SELECT osm_id_hash AS osm_id,
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geometry,
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NULLIF(name, '') AS 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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poi_class(subclass, mapping_key) AS class,
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CASE
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WHEN subclass = 'information'
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THEN NULLIF(information, '')
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WHEN subclass = 'place_of_worship'
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THEN NULLIF(religion, '')
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WHEN subclass = 'pitch'
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THEN NULLIF(sport, '')
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ELSE subclass
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END AS subclass,
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agg_stop,
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NULLIF(layer, 0) AS layer,
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"level",
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CASE WHEN indoor = TRUE THEN 1 END AS indoor,
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row_number() OVER (
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PARTITION BY LabelGrid(geometry, 100 * pixel_width)
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ORDER BY CASE WHEN name = '' THEN 2000 ELSE poi_class_rank(poi_class(subclass, mapping_key)) END ASC
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)::int AS "rank"
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FROM (
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-- etldoc: osm_poi_point -> layer_poi:z12
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-- etldoc: osm_poi_point -> layer_poi:z13
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SELECT *,
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osm_id * 10 AS osm_id_hash
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FROM osm_poi_point
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WHERE geometry && bbox
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AND zoom_level BETWEEN 12 AND 13
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AND ((subclass = 'station' AND mapping_key = 'railway')
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OR subclass IN ('halt', 'ferry_terminal'))
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UNION ALL
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-- etldoc: osm_poi_point -> layer_poi:z14_
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SELECT *,
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osm_id * 10 AS osm_id_hash
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FROM osm_poi_point
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WHERE geometry && bbox
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AND zoom_level >= 14
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UNION ALL
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-- etldoc: osm_poi_polygon -> layer_poi:z12
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-- etldoc: osm_poi_polygon -> layer_poi:z13
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-- etldoc: osm_poi_polygon -> layer_poi:z14_
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SELECT *,
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NULL::integer AS agg_stop,
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CASE
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WHEN osm_id < 0 THEN -osm_id * 10 + 4
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ELSE osm_id * 10 + 1
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END AS osm_id_hash
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FROM osm_poi_polygon
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WHERE geometry && bbox AND
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CASE
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WHEN zoom_level >= 14 THEN TRUE
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WHEN zoom_level >= 12 AND
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((subclass = 'station' AND mapping_key = 'railway')
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OR subclass IN ('halt', 'ferry_terminal')) THEN TRUE
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WHEN zoom_level BETWEEN 10 AND 14 THEN
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subclass IN ('university', 'college') AND
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POWER(4,zoom_level)
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-- Compute percentage of the earth's surface covered by this feature (approximately)
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-- The constant below is 111,842^2 * 180 * 180, where 111,842 is the length of one degree of latitude at the equator in meters.
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* area / (405279708033600 * COS(ST_Y(ST_Transform(geometry,4326))*PI()/180))
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-- Match features that are at least 10% of a tile at this zoom
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> 0.10
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ELSE FALSE END
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) AS poi_union
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ORDER BY "rank"
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$$ LANGUAGE SQL STABLE
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PARALLEL SAFE;
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-- TODO: Check if the above can be made STRICT -- i.e. if pixel_width could be NULL
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