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Adjust zoom levels of transportation_name layer

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This commit is contained in:
jirik
2017-03-15 11:08:26 +01:00
parent ca1b9a95a8
commit 6b523a5e0a
5 changed files with 171 additions and 5 deletions
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11
layers/transportation_name/merge_highways.sql
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@@ -80,12 +80,20 @@ CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen2_geometry_idx
-- etldoc: osm_transportation_name_linestring_gen2 -> osm_transportation_name_linestring_gen3
CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen3 AS (
SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, name_en, ref, highway, network, z_order
SELECT ST_Simplify(geometry, 200) AS geometry, osm_id, member_osm_ids, name, name_en, ref, highway, network, z_order
FROM osm_transportation_name_linestring_gen2
WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
);
CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen3_geometry_idx ON osm_transportation_name_linestring_gen3 USING gist(geometry);
-- etldoc: osm_transportation_name_linestring_gen3 -> osm_transportation_name_linestring_gen4
CREATE MATERIALIZED VIEW osm_transportation_name_linestring_gen4 AS (
SELECT ST_Simplify(geometry, 500) AS geometry, osm_id, member_osm_ids, name, name_en, ref, highway, network, z_order
FROM osm_transportation_name_linestring_gen3
WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
);
CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen4_geometry_idx ON osm_transportation_name_linestring_gen4 USING gist(geometry);
-- Handle updates
CREATE SCHEMA IF NOT EXISTS transportation_name;
@@ -106,6 +114,7 @@ CREATE OR REPLACE FUNCTION transportation_name.refresh() RETURNS trigger AS
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen1;
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen2;
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen3;
REFRESH MATERIALIZED VIEW osm_transportation_name_linestring_gen4;
DELETE FROM transportation_name.updates;
RETURN null;
END;