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Refactor road into table function

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This commit is contained in:
lukasmartinelli 2016-10-08 16:39:12 +02:00
parent c3aa9ae0a8
commit 7cb3b4a43a
2 changed files with 36 additions and 33 deletions
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30
data.yml
View File

@ -68,34 +68,8 @@ Layer:
max_size: 512 max_size: 512
password: osm password: osm
port: 5432 port: 5432
srid: '' srid: 900913
table: |- table: (SELECT * FROM layer_road(!bbox!, z(!scale_denominator!))) AS t
( SELECT *
FROM (
SELECT * FROM road_z4 WHERE z(!scale_denominator!) BETWEEN 4 AND 5
UNION ALL
SELECT * FROM road_z5 WHERE z(!scale_denominator!) = 5
UNION ALL
SELECT * FROM road_z6 WHERE z(!scale_denominator!) = 6
UNION ALL
SELECT * FROM road_z7 WHERE z(!scale_denominator!) = 7
UNION ALL
SELECT * FROM road_z8 WHERE z(!scale_denominator!) = 8
UNION ALL
SELECT ST_Simplify(geom, 200), class FROM road_z9 WHERE z(!scale_denominator!) = 9
UNION ALL
SELECT ST_Simplify(geom, 120), class FROM road_z10 WHERE z(!scale_denominator!) = 10
UNION ALL
SELECT ST_Simplify(geom, 50), class FROM road_z11 WHERE z(!scale_denominator!) = 11
UNION ALL
SELECT ST_Simplify(geom, 20), class FROM road_z12 WHERE z(!scale_denominator!) = 12
UNION ALL
SELECT * FROM road_z13 WHERE z(!scale_denominator!) = 13
UNION ALL
SELECT * FROM road_z14 WHERE z(!scale_denominator!) >= 14
) AS road
WHERE geom && !bbox!
) AS data
type: postgis type: postgis
user: osm user: osm
description: Buildings description: Buildings

29
schema/layers/road.sql
View File

@ -92,3 +92,32 @@ CREATE OR REPLACE VIEW road_z14 AS (
SELECT way AS geom, class::text SELECT way AS geom, class::text
FROM road_areas FROM road_areas
); );
CREATE OR REPLACE FUNCTION layer_road(bbox geometry, zoom_level int)
RETURNS TABLE(geom geometry, class text) AS $$
WITH zoom_levels AS (
SELECT * FROM road_z4 WHERE zoom_level BETWEEN 4 AND 5
UNION ALL
SELECT * FROM road_z5 WHERE zoom_level = 5
UNION ALL
SELECT * FROM road_z6 WHERE zoom_level = 6
UNION ALL
SELECT * FROM road_z7 WHERE zoom_level = 7
UNION ALL
SELECT * FROM road_z8 WHERE zoom_level = 8
UNION ALL
SELECT ST_Simplify(geom, 200), class FROM road_z9 WHERE zoom_level = 9
UNION ALL
SELECT ST_Simplify(geom, 120), class FROM road_z10 WHERE zoom_level = 10
UNION ALL
SELECT ST_Simplify(geom, 50), class FROM road_z11 WHERE zoom_level = 11
UNION ALL
SELECT ST_Simplify(geom, 20), class FROM road_z12 WHERE zoom_level = 12
UNION ALL
SELECT * FROM road_z13 WHERE zoom_level = 13
UNION ALL
SELECT * FROM road_z14 WHERE zoom_level >= 14
)
SELECT geom, class::text FROM zoom_levels
WHERE geom && bbox;
$$ LANGUAGE SQL IMMUTABLE;