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Use buildings from imposm3 mapping.

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lukasmartinelli
2016-10-10 19:35:07 +02:00
parent 28fedcc021
commit 908e6dc68c
3 changed files with 39 additions and 12 deletions
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16
layers/building/building.sql
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@@ -1,22 +1,22 @@
CREATE OR REPLACE VIEW building_z13 AS (
SELECT osm_id, way, height, levels FROM buildings WHERE way_area > 1400
SELECT osm_id, geometry, height, levels FROM osm_building_polygon_gen1 WHERE area > 1400
);
CREATE OR REPLACE VIEW building_z14 AS (
SELECT osm_id, way, height, levels FROM buildings
SELECT osm_id, geometry, height, levels FROM osm_building_polygon
);
CREATE OR REPLACE FUNCTION layer_building(bbox geometry, zoom_level int)
RETURNS TABLE(geom geometry, osm_id bigint, render_height float) AS $$
SELECT way, osm_id,
RETURNS TABLE(geom geometry, osm_id bigint, render_height numeric) AS $$
SELECT geometry, osm_id,
least(greatest(3, COALESCE(height, levels*3.66,5)),400)^.7 AS render_height
FROM (
SELECT osm_id, ST_Simplify(way, 10) AS way, height, levels FROM building_z13
WHERE zoom_level = 13 AND way && bbox
SELECT osm_id, ST_Simplify(geometry, 10) AS geometry, height, levels FROM building_z13
WHERE zoom_level = 13 AND geometry && bbox
UNION ALL
SELECT * FROM building_z14
WHERE zoom_level >= 14 AND way && bbox
WHERE zoom_level >= 14 AND geometry && bbox
) AS zoom_levels
ORDER BY render_height, ST_YMin(way) DESC;
ORDER BY render_height, ST_YMin(geometry) DESC;
$$ LANGUAGE SQL IMMUTABLE;