af8c6883dd
* At zooms 9-13, water labels will now be rendered for water features that are at least 0.25 tiles in size. This means that water features that are the same size as a 128x128 pixel square will get a point label. * Labels for large water features are now shown at the lowest zoom at which it's appropriate to show a label. * Bay and strait names (`natural=bay` and `natural=strait`) are included. * Large seas modeled as areas (e.g. Caspian Sea) render as `class=sea` rather than `class=lake`
82 lines
2.7 KiB
PL/PgSQL
82 lines
2.7 KiB
PL/PgSQL
-- etldoc: layer_water_name[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_water_name | <z0_8> z0_8 | <z9_13> z9_13 | <z14_> z14+" ] ;
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CREATE OR REPLACE FUNCTION layer_water_name(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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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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intermittent 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_water_lakeline -> layer_water_name:z9_13
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-- etldoc: osm_water_lakeline -> layer_water_name:z14_
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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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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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'lake'::text AS class,
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is_intermittent::int AS intermittent
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FROM osm_water_lakeline
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WHERE geometry && bbox
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AND ((zoom_level BETWEEN 9 AND 13 AND LineLabel(zoom_level, NULLIF(name, ''), geometry))
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OR (zoom_level >= 14))
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UNION ALL
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SELECT
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-- etldoc: osm_water_point -> layer_water_name:z9_13
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-- etldoc: osm_water_point -> layer_water_name:z14_
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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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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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class,
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is_intermittent::int AS intermittent
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FROM osm_water_point
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WHERE geometry && bbox
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AND (
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-- Show a label if a water feature covers at least 1/4 of a tile or z14+
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(tags->'place' IN ('sea', 'ocean') AND POWER(4,zoom_level) * earth_area > 0.25)
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OR (zoom_level BETWEEN 3 AND 13 AND POWER(4,zoom_level) * earth_area > 0.25)
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OR (zoom_level >= 14)
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)
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UNION ALL
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SELECT
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-- etldoc: osm_marine_point -> layer_water_name:z0_8
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-- etldoc: osm_marine_point -> layer_water_name:z9_13
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-- etldoc: osm_marine_point -> layer_water_name:z14_
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osm_id * 10 AS osm_id_hash,
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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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COALESCE(NULLIF("natural",''), "place") AS class,
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is_intermittent::int AS intermittent
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FROM osm_marine_point
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WHERE geometry && bbox
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AND CASE
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WHEN place = 'ocean' THEN TRUE
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WHEN zoom_level >= "rank" AND "rank" IS NOT NULL THEN TRUE
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WHEN "natural" = 'bay' THEN zoom_level >= 13
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ELSE zoom_level >= 8 END;
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$$ LANGUAGE SQL STABLE
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-- STRICT
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PARALLEL SAFE;
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