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Show large OSM water areas already at z7

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This commit is contained in:
lukasmartinelli 2016-10-09 17:42:51 +02:00
parent a9ff2cc04e
commit c2a0902e2c
1 changed files with 15 additions and 1 deletions
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16
schema/layers/water.sql
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@ -52,6 +52,17 @@ CREATE OR REPLACE VIEW water_z6 AS (
WHERE featurecla = 'River' WHERE featurecla = 'River'
); );
CREATE TABLE IF NOT EXISTS water_z7 AS (
SELECT geom FROM ne_10m_ocean
UNION ALL
SELECT ST_SimplifyPreserveTopology(way, 350) AS geom FROM water_areas
WHERE way_area > 9000000
UNION ALL
SELECT geom FROM ne_10m_rivers_lake_centerlines
WHERE featurecla = 'River'
);
CREATE INDEX IF NOT EXISTS water_z7_geom_idx ON water_z7 USING gist(geom);
CREATE TABLE IF NOT EXISTS water_z8 AS ( CREATE TABLE IF NOT EXISTS water_z8 AS (
SELECT geom FROM ne_10m_ocean SELECT geom FROM ne_10m_ocean
UNION ALL UNION ALL
@ -124,7 +135,10 @@ RETURNS TABLE(geom geometry) AS $$
WHERE zoom_level = 5 WHERE zoom_level = 5
UNION ALL UNION ALL
SELECT * FROM water_z6 SELECT * FROM water_z6
WHERE zoom_level BETWEEN 6 AND 7 WHERE zoom_level = 6
UNION ALL
SELECT * FROM water_z7
WHERE zoom_level = 7
UNION ALL UNION ALL
SELECT geom FROM water_z8 SELECT geom FROM water_z8
WHERE zoom_level = 8 WHERE zoom_level = 8