Reworked the POI mapping so that a subtype is available. Needed for wind_turbine, but might also prove useful later.

layers/poi/class.sql

@@ -62,7 +62,7 @@ SELECT CASE class
 $$ LANGUAGE SQL IMMUTABLE
                 PARALLEL SAFE;
 
-CREATE OR REPLACE FUNCTION poi_class(subclass text, mapping_key text)
+CREATE OR REPLACE FUNCTION poi_class(subclass text, mapping_key text, subtype text)
     RETURNS text AS
 $$
 SELECT CASE

layers/poi/layer.sql

@@ -26,7 +26,9 @@ SELECT osm_id_hash                                  AS osm_id,
        COALESCE(NULLIF(name_en, ''), name)          AS name_en,
        COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
        tags,
-       poi_class(subclass, mapping_key)             AS class,
+       poi_class(
+        subclass,
+        mapping_key,
         CASE
            WHEN subclass = 'information'
                THEN NULLIF(information, '')
@@ -34,11 +36,19 @@ SELECT osm_id_hash                                  AS osm_id,
                THEN NULLIF(religion, '')
            WHEN subclass = 'pitch'
                THEN NULLIF(sport, '')
-           WHEN power = 'generator' AND source = 'wind'
+           WHEN subclass = 'generator' AND mapping_key = 'power'
-                THEN 'wind_turbine'
-           WHEN power = 'generator'
                THEN NULLIF(source, '')
            ELSE subclass
+        END
+       )                                            AS class,
+       CASE
+           WHEN subclass = 'information'
+               THEN NULLIF(information, '')
+           WHEN subclass = 'place_of_worship'
+               THEN NULLIF(religion, '')
+           WHEN subclass = 'pitch'
+               THEN NULLIF(sport, '')
+           ELSE subclass
            END                                      AS subclass,
        agg_stop,
        NULLIF(layer, 0)                             AS layer,

layers/poi/poi.yaml

@@ -131,7 +131,10 @@ layer:
         heliport:
           subclass: ['helipad']
         wind_turbine:
-          subclass: ['wind']
+          __AND__:
+            subclass: ['generator']
+            subtype: ['wind']
+            mapping_key: 'aerialway'
         communications_tower:
           subclass: ['communications_tower']
         water_tower: