45 lines
1.1 KiB
PL/PgSQL
45 lines
1.1 KiB
PL/PgSQL
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, 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, 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 (
|
|
SELECT *
|
|
FROM ne_10m_global_roads
|
|
WHERE scalerank <= 4
|
|
);
|
|
|
|
CREATE OR REPLACE VIEW road_z5 AS (
|
|
SELECT *
|
|
FROM ne_10m_global_roads
|
|
WHERE scalerank <= 5
|
|
);
|
|
|
|
CREATE OR REPLACE VIEW road_z6 AS (
|
|
SELECT *
|
|
FROM ne_10m_global_roads
|
|
WHERE scalerank <= 6
|
|
);
|
|
|
|
CREATE OR REPLACE VIEW road_z7 AS (
|
|
SELECT *
|
|
FROM ne_10m_global_roads
|
|
WHERE scalerank <= 7
|
|
);
|