108 lines
3.4 KiB
PL/PgSQL
108 lines
3.4 KiB
PL/PgSQL
CREATE OR REPLACE VIEW boundary_z0 AS (
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SELECT geom, 2 AS admin_level
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FROM ne_110m_admin_0_boundary_lines_land
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);
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CREATE OR REPLACE VIEW boundary_z1 AS (
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SELECT geom, 2 AS admin_level
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FROM ne_50m_admin_0_boundary_lines_land
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UNION ALL
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SELECT geom, 4 AS admin_level
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FROM ne_50m_admin_1_states_provinces_lines
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WHERE scalerank <= 2
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);
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CREATE OR REPLACE VIEW boundary_z3 AS (
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SELECT geom, 2 AS admin_level
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FROM ne_50m_admin_0_boundary_lines_land
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UNION ALL
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SELECT geom, 4 AS admin_level
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FROM ne_50m_admin_1_states_provinces_lines
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);
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CREATE OR REPLACE VIEW boundary_z4 AS (
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SELECT geom, 2 AS admin_level
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FROM ne_10m_admin_0_boundary_lines_land
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UNION ALL
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SELECT geom, 4 AS admin_level
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FROM ne_10m_admin_1_states_provinces_lines_shp
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WHERE scalerank <= 3 AND featurecla = 'Adm-1 boundary'
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);
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CREATE OR REPLACE VIEW boundary_z5 AS (
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SELECT geom, 2 AS admin_level
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FROM ne_10m_admin_0_boundary_lines_land
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UNION ALL
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SELECT geom, 4 AS admin_level
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FROM ne_10m_admin_1_states_provinces_lines_shp
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WHERE scalerank <= 7 AND featurecla = 'Adm-1 boundary'
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);
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CREATE OR REPLACE VIEW boundary_z7 AS (
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SELECT geom, 2 AS admin_level
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FROM ne_10m_admin_0_boundary_lines_land
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UNION ALL
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SELECT geom, 4 AS admin_level
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FROM ne_10m_admin_1_states_provinces_lines_shp
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WHERE featurecla = 'Adm-1 boundary'
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);
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CREATE OR REPLACE VIEW boundary_z8 AS (
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SELECT geometry AS geom, admin_level
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FROM osm_boundary_linestring_gen5
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WHERE admin_level <= 4 AND ST_Length(geometry) > 1000
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);
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CREATE OR REPLACE VIEW boundary_z9 AS (
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SELECT geometry AS geom, admin_level
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FROM osm_boundary_linestring_gen4
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WHERE admin_level <= 6
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);
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CREATE OR REPLACE VIEW boundary_z10 AS (
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SELECT geometry AS geom, admin_level
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FROM osm_boundary_linestring_gen3
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WHERE admin_level <= 6
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);
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CREATE OR REPLACE VIEW boundary_z11 AS (
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SELECT geometry AS geom, admin_level
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FROM osm_boundary_linestring_gen2
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WHERE admin_level <= 8
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);
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CREATE OR REPLACE VIEW boundary_z12 AS (
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SELECT geometry AS geom, admin_level
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FROM osm_boundary_linestring_gen1
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);
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CREATE OR REPLACE FUNCTION layer_boundary (bbox geometry, zoom_level int)
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RETURNS TABLE(geometry geometry, admin_level int) AS $$
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SELECT geom, admin_level FROM (
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SELECT * FROM boundary_z0 WHERE geom && bbox AND zoom_level = 0
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UNION ALL
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SELECT * FROM boundary_z1 WHERE geom && bbox AND zoom_level BETWEEN 1 AND 2
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UNION ALL
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SELECT * FROM boundary_z3 WHERE geom && bbox AND zoom_level = 3
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UNION ALL
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SELECT * FROM boundary_z4 WHERE geom && bbox AND zoom_level = 4
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UNION ALL
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SELECT * FROM boundary_z5 WHERE geom && bbox AND zoom_level BETWEEN 5 AND 6
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UNION ALL
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SELECT * FROM boundary_z7 WHERE geom && bbox AND zoom_level = 7
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UNION ALL
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SELECT * FROM boundary_z8 WHERE geom && bbox AND zoom_level = 8
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UNION ALL
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SELECT * FROM boundary_z9 WHERE geom && bbox AND zoom_level = 9
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UNION ALL
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SELECT * FROM boundary_z10 WHERE geom && bbox AND zoom_level = 10
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UNION ALL
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SELECT * FROM boundary_z11 WHERE geom && bbox AND zoom_level = 11
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UNION ALL
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SELECT * FROM boundary_z12 WHERE geom && bbox AND zoom_level = 12
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UNION ALL
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SELECT * FROM boundary_z12 WHERE geom && bbox AND zoom_level >= 13
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) AS zoom_levels;
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$$ LANGUAGE SQL IMMUTABLE;
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