Create zoom level view and update source project query

osm2vectortiles.tm2source/data.yml

@@ -46,20 +46,8 @@ Layer:
           SELECT osm_id_polygon(osm_id) as osm_id, geometry, landuse_class(type) as class, type
             FROM (
               SELECT osm_id, geometry, type
-              FROM landuse_z5
-              WHERE z(!scale_denominator!) = 5
-              UNION ALL
-              SELECT osm_id, geometry, type
-              FROM landuse_z6
-              WHERE z(!scale_denominator!) = 6
-              UNION ALL
-              SELECT osm_id, geometry, type
-              FROM landuse_z7
-              WHERE z(!scale_denominator!) = 7
-              UNION ALL
-              SELECT osm_id, geometry, type
-              FROM landuse_z8
-              WHERE z(!scale_denominator!) = 8
+              FROM landuse_z5toz8
+              WHERE z(!scale_denominator!) BETWEEN 5 AND 8
               UNION ALL
               SELECT osm_id, geometry, type
               FROM landuse_z9

src/import-sql/layers/landuse.sql

@@ -1,26 +1,6 @@
-CREATE OR REPLACE VIEW landuse_z5 AS
-    SELECT *
-    FROM osm_landuse_polygon_gen0
-    WHERE landuse_class(type) IN ('wood', 'grass')
-      AND st_area(geometry) > 300000000;
-
-CREATE OR REPLACE VIEW landuse_z6 AS
-    SELECT *
-    FROM osm_landuse_polygon_gen0
-    WHERE landuse_class(type) IN ('wood', 'grass')
-      AND st_area(geometry) > 100000000;
-
-CREATE OR REPLACE VIEW landuse_z7 AS
-    SELECT *
-    FROM osm_landuse_polygon_gen0
-    WHERE landuse_class(type) IN ('wood', 'grass')
-      AND st_area(geometry) > 25000000;
-
-CREATE OR REPLACE VIEW landuse_z8 AS
-    SELECT *
-    FROM osm_landuse_polygon_gen0
-    WHERE landuse_class(type) IN ('wood', 'grass')
-      AND st_area(geometry) > 5000000;
+CREATE OR REPLACE VIEW landuse_z5toz8 AS
+    SELECT 0 AS osm_id, geometry, 'wood' AS type
+    FROM osm_landuse_clustered;
 
 CREATE OR REPLACE VIEW landuse_z9 AS
     SELECT *
@@ -52,13 +32,7 @@ CREATE OR REPLACE VIEW landuse_z13toz14 AS
     WHERE type NOT IN ('wetland', 'marsh', 'swamp', 'bog', 'mud', 'tidalflat', 'national_park', 'nature_reserve', 'protected_area');
 
 CREATE OR REPLACE VIEW landuse_layer AS (
-    SELECT osm_id, timestamp, geometry FROM landuse_z5
-    UNION
-    SELECT osm_id, timestamp, geometry FROM landuse_z6
-    UNION
-    SELECT osm_id, timestamp, geometry FROM landuse_z7
-    UNION
-    SELECT osm_id, timestamp, geometry FROM landuse_z8
+    SELECT osm_id, timestamp, geometry FROM landuse_z5toz8
     UNION
     SELECT osm_id, timestamp, geometry FROM landuse_z9
     UNION