Show larger water_polygons already from z11

osm2vectortiles.tm2source/data.yml

@@ -145,8 +145,12 @@ Layer:
             WHERE z(!scale_denominator!) BETWEEN 5 AND 7
             UNION ALL
             SELECT osm_id, geometry
-            FROM water_z8toz12
-            WHERE z(!scale_denominator!) BETWEEN 8 AND 12
+            FROM water_z8toz10
+            WHERE z(!scale_denominator!) BETWEEN 8 AND 10
+            UNION ALL
+            SELECT osm_id, geometry
+            FROM water_z11toz12
+            WHERE z(!scale_denominator!) BETWEEN 11 AND 12
             UNION ALL
             SELECT osm_id, geometry
             FROM water_z13toz14

src/import-sql/layers/water.sql

@@ -33,13 +33,21 @@ CREATE OR REPLACE VIEW water_z5toz7 AS
     SELECT osm_id, geometry
     FROM osm_water_polygon_gen1;
 
-CREATE OR REPLACE VIEW water_z8toz12 AS
+CREATE OR REPLACE VIEW water_z8toz10 AS
     SELECT 0 AS osm_id, way AS geometry
     FROM osm_ocean_polygons
     UNION ALL
     SELECT osm_id, geometry
     FROM osm_water_polygon_gen1;
 
+CREATE OR REPLACE VIEW water_z11toz12 AS
+    SELECT 0 AS osm_id, way AS geometry
+    FROM osm_ocean_polygons
+    UNION ALL
+    SELECT osm_id, geometry
+    FROM osm_water_polygon
+    WHERE ST_Area(geometry) > 20000;
+
 CREATE OR REPLACE VIEW water_z13toz14 AS
     SELECT 0 AS osm_id, way AS geometry
     FROM osm_ocean_polygons
@@ -58,7 +66,9 @@ CREATE OR REPLACE VIEW water_layer AS (
     UNION
     SELECT osm_id FROM water_z5toz7
     UNION
-    SELECT osm_id FROM water_z8toz12
+    SELECT osm_id FROM water_z8toz10
+    UNION
+    SELECT osm_id FROM water_z11toz12
     UNION
     SELECT osm_id FROM water_z13toz14
 );