add sand and beach

layers/landcover/landcover.sql

@@ -21,6 +21,7 @@ CREATE OR REPLACE FUNCTION landcover_class(landuse VARCHAR, "natural" VARCHAR, l
             OR leisure IN ('park', 'garden')
             THEN 'grass'
         WHEN "natural"='wetland' OR wetland IN ('bog', 'swamp', 'wet_meadow', 'marsh', 'reedbed', 'saltern', 'tidalflat', 'saltmarsh', 'mangrove') THEN 'wetland'
+        WHEN "natural"IN ('beach', 'sand') THEN 'sand'
         ELSE NULL
     END;
 $$ LANGUAGE SQL IMMUTABLE;

layers/landcover/mapping.yaml

@@ -90,6 +90,8 @@ tables:
       - glacier
       - bare_rock
       - scree
+      - beach
+      - sand
       leisure:
       - park
       - garden