Routes of Ireland (#1466)

This PR follows #1465 to implement pseudo-route relations for Republic of Ireland road routes as described in the [OSM wiki](https://wiki.openstreetmap.org/wiki/Ireland/Roads). Irish road routes work in the same way as UK road routes in that signage is derived from highway classification on a 1:1 basis. The scheme described in the OSM wiki is confirmed via [overpass query](https://overpass-turbo.eu/s/1por).

This feature follows the implementation currently used for UK road routes, in which a 10m Natural Earth polygon is used to determine which roads are located within Ireland to apply this processing.

This PR implements 3 classes of routes:
* M-roads, which are `highway=motorway` and signed with blue/white lettering.
* N-roads ("national roads"), which are `highway=trunk` or `highway=primary` and are signed with green/yellow lettering.
* R- and L-roads ("regional and local roads"), which are `highway=secondary`, `highway=tertiary` or `highway=unclassified`, and signed with white/black lettering

layers/transportation/network_type.sql

@@ -16,7 +16,8 @@ $$
             CREATE TYPE route_network_type AS enum (
                 'us-interstate', 'us-highway', 'us-state',
                 'ca-transcanada', 'ca-provincial-arterial', 'ca-provincial',
-                'gb-motorway', 'gb-trunk', 'gb-primary'
+                'gb-motorway', 'gb-trunk', 'gb-primary',
+                'ie-motorway', 'ie-national', 'ie-regional'
                 );
     END
 $$;

layers/transportation/transportation.yaml

@@ -127,7 +127,8 @@ layer:
           The network type derived mainly from [`network`](http://wiki.openstreetmap.org/wiki/Key:network) tag of the road.
           See more info about [`us-*`](http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_States),
           [`ca-transcanada`](https://en.wikipedia.org/wiki/Trans-Canada_Highway),
-          or [`gb-*`](http://wiki.openstreetmap.org/wiki/United_Kingdom_Tagging_Guidelines#UK_roads).
+          [`gb-*`](http://wiki.openstreetmap.org/wiki/United_Kingdom_Tagging_Guidelines#UK_roads),
+          or [`ie-*`](http://wiki.openstreetmap.org/wiki/Ireland/Roads).
     brunnel:
       description: |
           Mark whether way is a tunnel or bridge.

layers/transportation/update_route_member.sql

@@ -1,9 +1,20 @@
+-- Create bounding windows for country-specific processing
+
+-- etldoc: ne_10m_admin_0_countries ->  ne_10m_admin_0_gb_buffer
 CREATE TABLE IF NOT EXISTS ne_10m_admin_0_gb_buffer AS
 SELECT ST_Buffer(geometry, 10000)
 FROM ne_10m_admin_0_countries
 WHERE iso_a2 = 'GB';
 
--- etldoc:  osm_route_member ->  gbr_route_members_view
+-- etldoc: ne_10m_admin_0_countries ->  ne_10m_admin_0_ie_buffer
+CREATE TABLE IF NOT EXISTS ne_10m_admin_0_ie_buffer AS
+SELECT ST_Buffer(geometry, 10000)
+FROM ne_10m_admin_0_countries
+WHERE iso_a2 = 'IE';
+
+-- Assign pseudo-networks based highway classification
+-- etldoc:  osm_highway_linestring ->  gbr_route_members_view
+-- etldoc:  ne_10m_admin_0_gb_buffer ->  gbr_route_members_view
 CREATE OR REPLACE VIEW gbr_route_members_view AS
 SELECT 0,
        osm_id,
@@ -17,15 +28,40 @@ WHERE length(ref) > 1
   AND ST_Intersects(geometry, (SELECT * FROM ne_10m_admin_0_gb_buffer))
   AND highway IN ('motorway', 'trunk', 'primary', 'secondary')
 ;
--- Create GBR relations (so we can use it in the same way as other relations)
+
+-- etldoc:  osm_highway_linestring ->  ire_route_members_view
+-- etldoc:  ne_10m_admin_0_ie_buffer ->  ire_route_members_view
+CREATE OR REPLACE VIEW ire_route_members_view AS
+SELECT 0,
+       osm_id,
+       substring(ref FROM E'^[MNRL][0-9]+'),
+       -- See https://wiki.openstreetmap.org/wiki/Ireland/Roads
+       CASE WHEN highway = 'motorway' THEN 'omt-ie-motorway'
+            WHEN highway IN ('trunk','primary') THEN 'omt-ie-national' 
+            ELSE 'omt-ie-regional' END AS network
+FROM osm_highway_linestring
+WHERE length(ref) > 1
+  AND ST_Intersects(geometry, (SELECT * FROM ne_10m_admin_0_ie_buffer))
+  AND highway IN ('motorway', 'trunk', 'primary', 'secondary', 'unclassified')
+;
+
+-- Create GBR/IRE relations (so we can use it in the same way as other relations)
+-- etldoc:  osm_route_member ->  osm_route_member
 DELETE
 FROM osm_route_member
-WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk', 'omt-gb-primary');
+WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk', 'omt-gb-primary',
+                  'omt-ie-motorway', 'omt-ie-national', 'omt-ie-national');
+
 -- etldoc:  gbr_route_members_view ->  osm_route_member
 INSERT INTO osm_route_member (osm_id, member, ref, network)
 SELECT *
 FROM gbr_route_members_view;
 
+-- etldoc:  ire_route_members_view ->  osm_route_member
+INSERT INTO osm_route_member (osm_id, member, ref, network)
+SELECT *
+FROM ire_route_members_view;
+
 CREATE OR REPLACE FUNCTION osm_route_member_network_type(network text, ref text) RETURNS route_network_type AS
 $$
 SELECT CASE
@@ -48,6 +84,9 @@ SELECT CASE
            WHEN network = 'omt-gb-motorway' THEN 'gb-motorway'::route_network_type
            WHEN network = 'omt-gb-trunk' THEN 'gb-trunk'::route_network_type
            WHEN network = 'omt-gb-primary' THEN 'gb-primary'::route_network_type
+           WHEN network = 'omt-ie-motorway' THEN 'ie-motorway'::route_network_type
+           WHEN network = 'omt-ie-national' THEN 'ie-national'::route_network_type
+           WHEN network = 'omt-ie-regional' THEN 'ie-regional'::route_network_type
             END;
 $$ LANGUAGE sql IMMUTABLE
                 PARALLEL SAFE;
@@ -67,7 +106,8 @@ BEGIN
     FROM osm_route_member AS r
         USING
             transportation_name.network_changes AS c
-    WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk', 'omt-gb-primary')
+    WHERE network IN ('omt-gb-motorway', 'omt-gb-trunk', 'omt-gb-primary',
+                      'omt-ie-motorway', 'omt-ie-national', 'omt-ie-regional')
       AND r.osm_id = c.osm_id;
 
     INSERT INTO osm_route_member (osm_id, member, ref, network)
@@ -76,6 +116,12 @@ BEGIN
              JOIN transportation_name.network_changes AS c ON
         r.osm_id = c.osm_id;
 
+    INSERT INTO osm_route_member (osm_id, member, ref, network)
+    SELECT r.*
+    FROM ire_route_members_view AS r
+             JOIN transportation_name.network_changes AS c ON
+        r.osm_id = c.osm_id;
+
     INSERT INTO osm_route_member (id, osm_id, network_type, concurrency_index, rank)
     SELECT
       id,
@@ -110,6 +156,7 @@ ALTER TABLE osm_route_member ADD COLUMN IF NOT EXISTS concurrency_index int,
                              ADD COLUMN IF NOT EXISTS rank int;
 
 -- One-time load of concurrency indexes; updates occur via trigger
+-- etldoc:  osm_route_member ->  osm_route_member
 INSERT INTO osm_route_member (id, osm_id, concurrency_index, rank)
   SELECT
     id,
@@ -123,11 +170,13 @@ INSERT INTO osm_route_member (id, osm_id, concurrency_index, rank)
   FROM osm_route_member
   ON CONFLICT (id, osm_id) DO UPDATE SET concurrency_index = EXCLUDED.concurrency_index, rank = EXCLUDED.rank;
 
+-- etldoc:  osm_route_member ->  osm_highway_linestring
 UPDATE osm_highway_linestring hl
   SET network = rm.network_type
   FROM osm_route_member rm
   WHERE hl.osm_id=rm.member AND rm.concurrency_index=1;
 
+-- etldoc:  osm_route_member ->  osm_highway_linestring_gen_z11
 UPDATE osm_highway_linestring_gen_z11 hl
   SET network = rm.network_type
   FROM osm_route_member rm

layers/transportation_name/transportation_name.yaml

@@ -33,6 +33,9 @@ layer:
       - gb-motorway
       - gb-trunk
       - gb-primary
+      - ie-motorway
+      - ie-national
+      - ie-regional
       - road (default)
     class:
       description: |