0e17d53f42
Unblocks ZeLonewolf/openstreetmap-americana#51 Currently, OpenMapTiles renders protected areas at zoom 6 and higher. However, the western United States has protected areas that are so vast that it makes sense to render these areas as low as zoom 4, as noted in ZeLonewolf/openstreetmap-americana#51 This PR extends the generalization of park features from its current termination at zoom 6 to zoom 4. Here is an example from the Americana style of rendering protected areas at zoom 6, which is currently the lowest supported zoom: https://zelonewolf.github.io/openstreetmap-americana/#6/45.313/-111.721 We would like to provide rendering at zoom 4 (no labels) and zoom 5 (with labels) in the Americana style. Below are samples generated from this PR for Idaho, USA: Zoom 4:  Zoom 5: 
193 lines
7.4 KiB
PL/PgSQL
193 lines
7.4 KiB
PL/PgSQL
ALTER TABLE osm_park_polygon
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z13
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z12
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z11
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z10
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z9
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z8
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z7
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z6
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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ALTER TABLE osm_park_polygon_gen_z5
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ADD COLUMN IF NOT EXISTS geometry_point geometry;
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-- etldoc: osm_park_polygon_dissolve_z4 -> osm_park_polygon_gen_z4
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DROP MATERIALIZED VIEW IF EXISTS osm_park_polygon_dissolve_z4 CASCADE;
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CREATE MATERIALIZED VIEW osm_park_polygon_dissolve_z4 AS
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(
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SELECT
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(ST_Dump(
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ST_Union(geometry))).geom AS geometry
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FROM osm_park_polygon_gen_z4
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);
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z13;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z12;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z11;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z10;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z9;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z8;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z7;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z6;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z5;
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DROP TRIGGER IF EXISTS update_row ON osm_park_polygon_gen_z4;
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-- etldoc: osm_park_polygon -> osm_park_polygon
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-- etldoc: osm_park_polygon_gen_z13 -> osm_park_polygon_gen_z13
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-- etldoc: osm_park_polygon_gen_z12 -> osm_park_polygon_gen_z12
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-- etldoc: osm_park_polygon_gen_z11 -> osm_park_polygon_gen_z11
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-- etldoc: osm_park_polygon_gen_z10 -> osm_park_polygon_gen_z10
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-- etldoc: osm_park_polygon_gen_z9 -> osm_park_polygon_gen_z9
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-- etldoc: osm_park_polygon_gen_z8 -> osm_park_polygon_gen_z8
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-- etldoc: osm_park_polygon_gen_z7 -> osm_park_polygon_gen_z7
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-- etldoc: osm_park_polygon_gen_z6 -> osm_park_polygon_gen_z6
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-- etldoc: osm_park_polygon_gen_z5 -> osm_park_polygon_gen_z5
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-- etldoc: osm_park_polygon_gen_z4 -> osm_park_polygon_gen_z4
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CREATE OR REPLACE FUNCTION update_osm_park_polygon() RETURNS void AS
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$$
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BEGIN
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UPDATE osm_park_polygon
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z13
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z12
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z11
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z10
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z9
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z8
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z7
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z6
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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UPDATE osm_park_polygon_gen_z5
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SET tags = update_tags(tags, geometry),
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geometry_point = st_centroid(geometry);
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REFRESH MATERIALIZED VIEW osm_park_polygon_dissolve_z4;
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END;
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$$ LANGUAGE plpgsql;
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SELECT update_osm_park_polygon();
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CREATE INDEX IF NOT EXISTS osm_park_polygon_point_geom_idx ON osm_park_polygon USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z13_point_geom_idx ON osm_park_polygon_gen_z13 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z12_point_geom_idx ON osm_park_polygon_gen_z12 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z11_point_geom_idx ON osm_park_polygon_gen_z11 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z10_point_geom_idx ON osm_park_polygon_gen_z10 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z9_point_geom_idx ON osm_park_polygon_gen_z9 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z8_point_geom_idx ON osm_park_polygon_gen_z8 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z7_point_geom_idx ON osm_park_polygon_gen_z7 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z6_point_geom_idx ON osm_park_polygon_gen_z6 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z5_point_geom_idx ON osm_park_polygon_gen_z5 USING gist (geometry_point);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_gen_z4_polygon_geom_idx ON osm_park_polygon_gen_z4 USING gist (geometry);
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CREATE INDEX IF NOT EXISTS osm_park_polygon_dissolve_z4_polygon_geom_idx ON osm_park_polygon_dissolve_z4 USING gist (geometry);
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CREATE OR REPLACE FUNCTION update_osm_park_polygon_row()
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RETURNS trigger
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AS
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$$
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BEGIN
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NEW.tags = update_tags(NEW.tags, NEW.geometry);
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NEW.geometry_point = st_centroid(NEW.geometry);
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z13
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z12
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z11
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z10
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z9
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z8
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z7
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z6
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z5
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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CREATE TRIGGER update_row
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BEFORE INSERT OR UPDATE
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ON osm_park_polygon_gen_z4
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FOR EACH ROW
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EXECUTE PROCEDURE update_osm_park_polygon_row();
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