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Add waterway layer

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This commit is contained in:
lukasmartinelli
2016-10-24 09:40:14 +02:00
parent 250bcd01a4
commit 446544f5c8
8 changed files with 114 additions and 46 deletions
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46
layers/water/water.sql
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@@ -16,49 +16,28 @@ CREATE OR REPLACE VIEW water_z2 AS (
SELECT geom, 'lake' AS class FROM ne_110m_lakes
);
CREATE OR REPLACE VIEW water_z3 AS (
SELECT geom, 'ocean' AS class FROM ne_50m_ocean
UNION ALL
SELECT geom, 'lake' AS class FROM ne_110m_lakes
UNION ALL
SELECT geom, 'river' AS class FROM ne_110m_rivers_lake_centerlines
WHERE featurecla = 'River'
);
CREATE OR REPLACE VIEW water_z4 AS (
SELECT geom, 'ocean' AS class FROM ne_50m_ocean
UNION ALL
SELECT geom, 'lake' AS class FROM ne_50m_lakes
UNION ALL
SELECT geom, 'river' AS class FROM ne_50m_rivers_lake_centerlines
WHERE featurecla = 'River'
);
CREATE OR REPLACE VIEW water_z5 AS (
SELECT geom, 'ocean' AS class FROM ne_10m_ocean
UNION ALL
SELECT geom, 'lake' AS class FROM ne_10m_lakes
UNION ALL
SELECT geom, 'river' AS class FROM ne_50m_rivers_lake_centerlines
WHERE featurecla = 'River'
);
CREATE OR REPLACE VIEW water_z6 AS (
SELECT geom, 'ocean' AS class FROM ne_10m_ocean
UNION ALL
SELECT geom, 'lake' AS class FROM ne_10m_lakes
UNION ALL
SELECT geom, 'river' AS class FROM ne_10m_rivers_lake_centerlines
WHERE featurecla = 'River'
);
CREATE TABLE IF NOT EXISTS water_z7 AS (
SELECT geom, 'ocean' AS class FROM ne_10m_ocean
UNION ALL
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon_gen3
UNION ALL
SELECT geom, 'river' AS class FROM ne_10m_rivers_lake_centerlines
WHERE featurecla = 'River'
);
CREATE INDEX IF NOT EXISTS water_z7_geom_idx ON water_z7 USING gist(geom);
@@ -66,57 +45,38 @@ CREATE TABLE IF NOT EXISTS water_z8 AS (
SELECT geom, 'ocean' AS class FROM ne_10m_ocean
UNION ALL
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon_gen2
UNION ALL
SELECT ST_Simplify(geometry, 200) AS geom, waterway AS class FROM osm_water_linestring
WHERE waterway IN ('river') AND ST_Length(geometry) > 10000
);
CREATE INDEX IF NOT EXISTS water_z8_geom_idx ON water_z8 USING gist(geom);
CREATE TABLE IF NOT EXISTS water_z9 AS (
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon_gen1
UNION ALL
SELECT ST_Simplify(geometry, 100) AS geom, waterway AS class FROM osm_water_linestring
WHERE waterway IN ('river') AND ST_Length(geometry) > 5000
SELECT geometry AS geom, 'lake'::text AS class FROM osm_water_polygon_gen1
);
CREATE INDEX IF NOT EXISTS water_z9_geom_idx ON water_z9 USING gist(geom);
CREATE OR REPLACE VIEW water_z11 AS (
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon WHERE area > 40000
UNION ALL
SELECT geometry AS geom, waterway AS class FROM osm_water_linestring
WHERE waterway IN ('river') AND ST_Length(geometry) > 5000
);
CREATE OR REPLACE VIEW water_z12 AS (
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon WHERE area > 10000
UNION ALL
SELECT geometry AS geom, waterway AS class FROM osm_water_linestring
WHERE waterway IN ('river', 'canal') OR (waterway = 'stream' AND ST_Length(geometry) > 1000)
);
CREATE OR REPLACE VIEW water_z13 AS (
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon WHERE area > 5000
UNION ALL
SELECT geometry AS geom, waterway AS class FROM osm_water_linestring
WHERE waterway IN ('river', 'canal', 'stream', 'drain', 'ditch') AND ST_Length(geometry) > 300
);
CREATE OR REPLACE VIEW water_z14 AS (
SELECT geometry AS geom, 'lake' AS class FROM osm_water_polygon
UNION ALL
SELECT geometry AS geom, waterway AS class FROM osm_water_linestring
);
CREATE OR REPLACE FUNCTION layer_water (bbox geometry, zoom_level int)
RETURNS TABLE(geom geometry, class text) AS $$
SELECT geom, class FROM (
SELECT geom, class::text FROM (
SELECT * FROM water_z0 WHERE zoom_level = 0
UNION ALL
SELECT * FROM water_z1 WHERE zoom_level = 1
UNION ALL
SELECT * FROM water_z2 WHERE zoom_level = 2
UNION ALL
SELECT * FROM water_z3 WHERE zoom_level = 3
SELECT * FROM water_z2 WHERE zoom_level BETWEEN 2 AND 3
UNION ALL
SELECT * FROM water_z4 WHERE zoom_level = 4
UNION ALL