Add aeroway_label layer

layers/aerodrome_label/layer.sql

@@ -0,0 +1,60 @@
+
+-- etldoc: layer_aerodrome_label[shape=record fillcolor=lightpink, style="rounded,filled", label="layer_aerodrome_label | <z10_> z10+" ] ;
+
+CREATE OR REPLACE FUNCTION layer_aerodrome_label(
+    bbox geometry,
+    zoom_level integer,
+    pixel_width numeric)
+  RETURNS TABLE(
+    osm_id bigint,
+    geometry geometry,
+    name text,
+    name_en text,
+    name_de text,
+    tags hstore,
+    class text,
+    iata text,
+    icao text,
+    ele int,
+    ele_ft int) AS
+$$
+  -- etldoc: osm_aerodrome_label_point -> layer_aerodrome_label:z10_
+  SELECT
+    osm_id,
+    geometry,
+    name,
+    COALESCE(NULLIF(name_en, ''), name) AS name_en,
+    COALESCE(NULLIF(name_de, ''), name, name_en) AS name_de,
+    tags,
+    CASE
+      WHEN aerodrome = 'international'
+          OR aerodrome_type = 'international'
+        THEN 'international'
+      WHEN
+          aerodrome = 'public'
+          OR aerodrome_type LIKE '%public%'
+          OR aerodrome_type = 'civil'
+        THEN 'public'
+      WHEN
+          aerodrome = 'regional'
+          OR aerodrome_type = 'regional'
+        THEN 'regional'
+      WHEN
+          aerodrome = 'military'
+          OR aerodrome_type LIKE '%military%'
+          OR military = 'airfield'
+        THEN 'military'
+      WHEN
+          aerodrome = 'private'
+          OR aerodrome_type = 'private'
+        THEN 'private'
+      ELSE 'other'
+    END AS class,
+    NULLIF(iata, '') AS iata,
+    NULLIF(icao, '') AS icao,
+    substring(ele from E'^(-?\\d+)(\\D|$)')::int AS ele,
+    round(substring(ele from E'^(-?\\d+)(\\D|$)')::int*3.2808399)::int AS ele_ft
+  FROM osm_aerodrome_label_point
+  WHERE geometry && bbox AND zoom_level >= 10;
+
+$$ LANGUAGE SQL IMMUTABLE;