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Extract boundary into table function

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This commit is contained in:
lukasmartinelli 2016-10-08 16:30:11 +02:00
parent 66d4405ed3
commit dea365463f
2 changed files with 39 additions and 36 deletions
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38
data.yml
View File

@ -87,42 +87,8 @@ Layer:
max_size: 512 max_size: 512
password: osm password: osm
port: 5432 port: 5432
srid: '' srid: 900913
table: |- table: (SELECT * FROM layer_boundary(!bbox!, z(!scale_denominator!))) AS t
( SELECT *
FROM (
SELECT * FROM boundary_z0 WHERE z(!scale_denominator!) = 0
UNION ALL
SELECT * FROM boundary_z1 WHERE z(!scale_denominator!) BETWEEN 1 AND 2
UNION ALL
SELECT * FROM boundary_z3 WHERE z(!scale_denominator!) = 3
UNION ALL
SELECT * FROM boundary_z4 WHERE z(!scale_denominator!) = 4
UNION ALL
SELECT * FROM boundary_z5 WHERE z(!scale_denominator!) BETWEEN 5 AND 6
UNION ALL
SELECT * FROM boundary_z7 WHERE z(!scale_denominator!) = 7
UNION ALL
SELECT ST_Simplify(geom, 400) AS geom, admin_level, scalerank, class
FROM boundary_z8 WHERE z(!scale_denominator!) = 8
UNION ALL
SELECT ST_Simplify(geom, 320) AS geom, admin_level, scalerank, class
FROM boundary_z8 WHERE z(!scale_denominator!) = 9
UNION ALL
SELECT ST_Simplify(geom, 150) AS geom, admin_level, scalerank, class
FROM boundary_z10 WHERE z(!scale_denominator!) = 10
UNION ALL
SELECT ST_Simplify(geom, 100) AS geom, admin_level, scalerank, class
FROM boundary_z10 WHERE z(!scale_denominator!) = 11
UNION ALL
SELECT ST_Simplify(geom, 50) AS geom, admin_level, scalerank, class
FROM boundary_z10 WHERE z(!scale_denominator!) = 12
UNION ALL
SELECT geom, admin_level, scalerank, class
FROM boundary_z10 WHERE z(!scale_denominator!) >= 13
) AS admin
WHERE geom && !bbox!
) AS data
type: postgis type: postgis
user: osm user: osm
description: Buildings description: Buildings

37
schema/layers/boundary.sql
View File

@ -85,3 +85,40 @@ CREATE OR REPLACE VIEW boundary_z10 AS (
FROM admin_line FROM admin_line
WHERE level <= 8 WHERE level <= 8
); );
CREATE OR REPLACE FUNCTION layer_boundary (bbox geometry, zoom_level int)
RETURNS TABLE(geom geometry, admin_level int, scalerank int, class text) AS $$
WITH zoom_levels AS (
SELECT * FROM boundary_z0 WHERE zoom_level = 0
UNION ALL
SELECT * FROM boundary_z1 WHERE zoom_level BETWEEN 1 AND 2
UNION ALL
SELECT * FROM boundary_z3 WHERE zoom_level = 3
UNION ALL
SELECT * FROM boundary_z4 WHERE zoom_level = 4
UNION ALL
SELECT * FROM boundary_z5 WHERE zoom_level BETWEEN 5 AND 6
UNION ALL
SELECT * FROM boundary_z7 WHERE zoom_level = 7
UNION ALL
SELECT ST_Simplify(geom, 400) AS geom, admin_level, scalerank, class
FROM boundary_z8 WHERE zoom_level = 8
UNION ALL
SELECT ST_Simplify(geom, 320) AS geom, admin_level, scalerank, class
FROM boundary_z8 WHERE zoom_level = 9
UNION ALL
SELECT ST_Simplify(geom, 150) AS geom, admin_level, scalerank, class
FROM boundary_z10 WHERE zoom_level = 10
UNION ALL
SELECT ST_Simplify(geom, 100) AS geom, admin_level, scalerank, class
FROM boundary_z10 WHERE zoom_level = 11
UNION ALL
SELECT ST_Simplify(geom, 50) AS geom, admin_level, scalerank, class
FROM boundary_z10 WHERE zoom_level = 12
UNION ALL
SELECT geom, admin_level, scalerank, class
FROM boundary_z10 WHERE zoom_level >= 13
)
SELECT geom, admin_level, scalerank::int, class FROM zoom_levels
WHERE geom && bbox;
$$ LANGUAGE SQL;