71 lines
3.1 KiB
PL/PgSQL
71 lines
3.1 KiB
PL/PgSQL
-- etldoc: layer_park_label[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_park |<z6> z6 |<z7> z7 |<z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14> z14+" ] ;
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CREATE OR REPLACE FUNCTION layer_park_label(bbox geometry, zoom_level int, pixel_width numeric)
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RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, name_de text, tags hstore, class text, rank int) AS $$
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SELECT osm_id, geometry_point, name, name_en, name_de, tags,
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COALESCE(NULLIF(boundary, ''), NULLIF(leisure, '')) AS class,
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row_number() OVER (
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PARTITION BY LabelGrid(geometry_point, 100 * pixel_width)
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ORDER BY
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(CASE WHEN boundary = 'national_park' THEN true ELSE false END) DESC,
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(COALESCE(NULLIF(tags->'wikipedia', ''), NULLIF(tags->'wikidata', '')) IS NOT NULL) DESC,
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area DESC
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)::int AS "rank"
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FROM (
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-- etldoc: osm_park_polygon_gen8 -> layer_park_label:z6
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen8
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WHERE zoom_level = 6
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UNION ALL
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-- etldoc: osm_park_polygon_gen7 -> layer_park_label:z7
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen7
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WHERE zoom_level = 7
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UNION ALL
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-- etldoc: osm_park_polygon_gen6 -> layer_park_label:z8
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen6
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WHERE zoom_level = 8
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UNION ALL
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-- etldoc: osm_park_polygon_gen5 -> layer_park_label:z9
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen5
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WHERE zoom_level = 9
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UNION ALL
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-- etldoc: osm_park_polygon_gen4 -> layer_park_label:z10
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen4
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WHERE zoom_level = 10
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UNION ALL
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-- etldoc: osm_park_polygon_gen3 -> layer_park_label:z11
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen3
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WHERE zoom_level = 11
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UNION ALL
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-- etldoc: osm_park_polygon_gen2 -> layer_park_label:z12
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen2
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WHERE zoom_level = 12
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UNION ALL
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-- etldoc: osm_park_polygon_gen1 -> layer_park_label:z13
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon_gen1
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WHERE zoom_level = 13
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UNION ALL
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-- etldoc: osm_park_polygon -> layer_park_label:z14
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SELECT osm_id, geometry_point, name, name_en, name_de, tags, leisure, boundary, area
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FROM osm_park_polygon
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WHERE zoom_level >= 14
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) AS zoom_levels
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WHERE geometry_point && bbox;
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$$ LANGUAGE SQL IMMUTABLE;
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