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Classify road

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This commit is contained in:
lukasmartinelli 2016-10-06 19:10:00 +02:00
parent dceed82851
commit 8d443df890
1 changed files with 16 additions and 3 deletions
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19
schema/layers/road.sql
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@ -1,9 +1,22 @@
CREATE OR REPLACE FUNCTION ne_road_class(type VARCHAR) RETURNS VARCHAR AS $$
SELECT CASE type
WHEN 'Major Highway' THEN 'motorway'
WHEN 'Secondary Highway' THEN 'trunk'
WHEN 'Road' THEN 'primary'
ELSE type
END;
$$ LANGUAGE SQL IMMUTABLE;
CREATE OR REPLACE VIEW ne_10m_global_roads AS (
SELECT geom, scalerank, type
FROM ne_10m_roads WHERE continent <> 'North America' AND featurecla = 'Road'
SELECT geom, scalerank, ne_road_class(type) AS class
FROM ne_10m_roads
WHERE continent <> 'North America'
AND featurecla = 'Road'
AND type IN ('Major Highway', 'Secondary Highway', 'Road')
UNION ALL
SELECT geom, scalerank, type
SELECT geom, scalerank, ne_road_class(type) AS class
FROM ne_10m_roads_north_america
WHERE type IN ('Major Highway', 'Secondary Highway', 'Road')
);
CREATE OR REPLACE VIEW road_z4 AS (