kopia lustrzana https://github.com/openmaptiles/openmaptiles
23 wiersze
871 B
PL/PgSQL
23 wiersze
871 B
PL/PgSQL
CREATE OR REPLACE VIEW building_z13 AS (
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SELECT osm_id, geometry, height, levels FROM osm_building_polygon_gen1 WHERE area > 1400
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);
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CREATE OR REPLACE VIEW building_z14 AS (
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SELECT osm_id, geometry, height, levels FROM osm_building_polygon
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);
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CREATE OR REPLACE FUNCTION layer_building(bbox geometry, zoom_level int)
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RETURNS TABLE(geom geometry, osm_id bigint, render_height numeric) AS $$
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SELECT geometry, osm_id,
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least(greatest(3, COALESCE(height, levels*3.66,5)),400)^.7 AS render_height
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FROM (
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SELECT osm_id, ST_Simplify(geometry, 10) AS geometry, height, levels FROM building_z13
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WHERE zoom_level = 13 AND geometry && bbox
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UNION ALL
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SELECT * FROM building_z14
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WHERE zoom_level >= 14 AND geometry && bbox
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) AS zoom_levels
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ORDER BY render_height, ST_YMin(geometry) DESC;
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$$ LANGUAGE SQL IMMUTABLE;
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