373a28e7ad
* Add better support for 3d buildings Change key from "levels" to "building:levels" as the "levels" key is non-standard and sees much less use than "building:levels" * Fix typo in sql definition and missing render_min_height * Add render_height and min_height to building.yaml * Simplify the render, switch numeric to int. Assume min_height cannot be negative. There are a few examples in overpass, but can't show below ground anyways in mapbox (https://github.com/mapbox/mapbox-gl-js/issues/3456). Also don't attempt to fix min_height>height * Remove colour as it is not currently used
24 lines
1.1 KiB
PL/PgSQL
24 lines
1.1 KiB
PL/PgSQL
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-- etldoc: layer_building[shape=record fillcolor=lightpink, style="rounded,filled",
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-- etldoc: label="layer_building | <z13> z13 | <z14_> z14_ " ] ;
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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 int, render_min_height int) AS $$
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SELECT geometry, osm_id,
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greatest(5, COALESCE(height, levels*3.66,5))::int AS render_height,
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greatest(0, COALESCE(min_height, min_level*3.66,0))::int AS render_min_height
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FROM (
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-- etldoc: osm_building_polygon_gen1 -> layer_building:z13
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SELECT osm_id, geometry, height, levels, min_height, min_level FROM osm_building_polygon_gen1
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WHERE zoom_level = 13 AND geometry && bbox AND area > 1400
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UNION ALL
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-- etldoc: osm_building_polygon -> layer_building:z14_
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SELECT osm_id, geometry, height, levels, min_height, min_level FROM osm_building_polygon
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WHERE zoom_level >= 14 AND geometry && bbox
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) AS zoom_levels
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ORDER BY render_height ASC, ST_YMin(geometry) DESC;
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$$ LANGUAGE SQL IMMUTABLE;
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