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Separated zoom level 5 and 6, with different simplify tolerance and length of geometry.

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This commit is contained in:
MartinMikita
2017-03-29 20:49:20 +02:00
committed by Jiri Kozel
parent bbe4e67c14
commit 52933f5cfc
2 changed files with 37 additions and 11 deletions
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29
layers/transportation/merge_highways.sql
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@@ -1,6 +1,7 @@
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring CASCADE;
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen5 CASCADE;
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen6 CASCADE;
DROP MATERIALIZED VIEW IF EXISTS osm_transportation_merge_linestring_gen7 CASCADE;
DROP TRIGGER IF EXISTS trigger_flag2 ON osm_highway_linestring;
@@ -39,8 +40,8 @@ CREATE MATERIALIZED VIEW osm_transportation_merge_linestring AS (
group by highway
) AS highway_union
);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_geometry_idx ON osm_transportation_merge_linestring USING gist(geometry);
-- Improve performance of the sql below
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_geometry_idx
ON osm_transportation_merge_linestring USING gist(geometry);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_highway_partial_idx
ON osm_transportation_merge_linestring(highway)
WHERE highway IN ('motorway','trunk');
@@ -51,19 +52,32 @@ CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen5 AS (
FROM osm_transportation_merge_linestring
WHERE highway IN ('motorway','trunk') AND ST_Length(geometry) > 100
);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen5_geometry_idx ON osm_transportation_merge_linestring_gen5 USING gist(geometry);
-- Improve performance of the sql below
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen5_geometry_idx
ON osm_transportation_merge_linestring_gen5 USING gist(geometry);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen5_highway_partial_idx
ON osm_transportation_merge_linestring_gen5(highway)
WHERE highway IN ('motorway');
WHERE highway IN ('motorway', 'trunk');
-- etldoc: osm_transportation_merge_linestring_gen5 -> osm_transportation_merge_linestring_gen6
CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen6 AS (
SELECT ST_Simplify(geometry, 2000) AS geometry, osm_id, highway, z_order
SELECT ST_Simplify(geometry, 1000) AS geometry, osm_id, highway, z_order
FROM osm_transportation_merge_linestring_gen5
WHERE highway IN ('motorway','trunk') AND ST_Length(geometry) > 500
);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen6_geometry_idx
ON osm_transportation_merge_linestring_gen6 USING gist(geometry);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen6_highway_partial_idx
ON osm_transportation_merge_linestring_gen6(highway)
WHERE highway IN ('motorway');
-- etldoc: osm_transportation_merge_linestring_gen6 -> osm_transportation_merge_linestring_gen7
CREATE MATERIALIZED VIEW osm_transportation_merge_linestring_gen7 AS (
SELECT ST_Simplify(geometry, 2000) AS geometry, osm_id, highway, z_order
FROM osm_transportation_merge_linestring_gen6
WHERE highway IN ('motorway') AND ST_Length(geometry) > 1000
);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen6_geometry_idx ON osm_transportation_merge_linestring_gen6 USING gist(geometry);
CREATE INDEX IF NOT EXISTS osm_transportation_merge_linestring_gen7_geometry_idx
ON osm_transportation_merge_linestring_gen7 USING gist(geometry);
-- Handle updates
@@ -85,6 +99,7 @@ CREATE OR REPLACE FUNCTION transportation.refresh() RETURNS trigger AS
REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring;
REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen5;
REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen6;
REFRESH MATERIALIZED VIEW osm_transportation_merge_linestring_gen7;
DELETE FROM transportation.updates;
RETURN null;
END;