Add network type to transportation_name layer, adjust 'ref' attribute

layers/transportation_name/layer.sql

@@ -9,7 +9,7 @@ RETURNS TABLE(osm_id bigint, geometry geometry, name text, name_en text, ref tex
       COALESCE(NULLIF(name_en, ''), NULLIF(name, '')) AS name_en,
       NULLIF(ref, ''), NULLIF(LENGTH(ref), 0) AS ref_length,
       --TODO: The road network of the road is not yet implemented
-      NULL::text AS network,
+      network::text,
       highway_class(highway) AS class
     FROM (
 

layers/transportation_name/merge_highways.sql

@@ -6,10 +6,28 @@ DROP TRIGGER IF EXISTS trigger_refresh ON transportation_name.updates;
 -- to allow for nice label rendering
 -- Because this works well for roads that do not have relations as well
 
-DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring CASCADE;
-DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen1 CASCADE;
-DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen2 CASCADE;
-DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen3 CASCADE;
+
+CREATE MATERIALIZED VIEW osm_transportation_name_network AS (
+  SELECT
+      hl.geometry,
+      hl.osm_id,
+      hl.name,
+      COALESCE(NULLIF(hl.name_en, ''), hl.name) AS name_en,
+      rm.network_type,
+      CASE
+        WHEN rm.network_type is not null
+          then rm.ref::text
+        else hl.ref
+      end as ref,
+      hl.highway,
+      ROW_NUMBER() OVER(PARTITION BY hl.osm_id
+                                   ORDER BY rm.network_type) AS "rank",
+      hl.z_order
+  FROM osm_highway_linestring hl
+  left join osm_route_member rm on (rm.member = hl.osm_id)
+);
+CREATE INDEX IF NOT EXISTS osm_transportation_name_network_geometry_idx ON osm_transportation_name_network USING gist(geometry);
+
 
 -- etldoc: osm_highway_linestring ->  osm_transportation_name_linestring
 CREATE MATERIALIZED VIEW osm_transportation_name_linestring AS (
@@ -17,28 +35,29 @@ CREATE MATERIALIZED VIEW osm_transportation_name_linestring AS (
         (ST_Dump(geometry)).geom AS geometry,
         -- NOTE: The osm_id is no longer the original one which can make it difficult
         -- to lookup road names by OSM ID
-        member_osm_ids[0] AS osm_id,
+        member_osm_ids[1] AS osm_id,
         member_osm_ids,
         name,
         name_en,
         ref,
         highway,
-        network,
+        network_type AS network,
         z_order
     FROM (
       SELECT
           ST_LineMerge(ST_Collect(geometry)) AS geometry,
-          hl.name,
-          COALESCE(NULLIF(hl.name_en, ''), hl.name) AS name_en,
-          hl.ref,
-          hl.highway,
-          min(rm.network) AS network, --should be improved, may be part of more networks
-          min(hl.z_order) AS z_order,
-          array_agg(DISTINCT hl.osm_id) AS member_osm_ids
-      FROM osm_highway_linestring hl
-      left join osm_route_member rm on (rm.member = hl.osm_id)
-      WHERE (hl.name <> '' OR hl.ref <> '')
-      group by hl.name, name_en, hl.ref, hl.highway
+          name,
+          name_en,
+          ref,
+          highway,
+          network_type,
+          min(z_order) AS z_order,
+          array_agg(DISTINCT osm_id) AS member_osm_ids
+      FROM osm_transportation_name_network
+      WHERE ("rank"=1 OR "rank" is null)
+        AND (name <> '' OR ref <> '')
+        AND NULLIF(highway, '') IS NOT NULL
+      group by name, name_en, ref, highway, network_type
     ) AS highway_union
 );
 CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_geometry_idx ON osm_transportation_name_linestring USING gist(geometry);

layers/transportation_name/network_type.sql

@@ -1,9 +1,15 @@
+DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_network CASCADE;
+DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring CASCADE;
+DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen1 CASCADE;
+DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen2 CASCADE;
+DROP MATERIALIZED VIEW IF EXISTS osm_transportation_name_linestring_gen3 CASCADE;
+
 DO $$
     BEGIN
         BEGIN
             ALTER TABLE osm_route_member ADD COLUMN network_type text;
         EXCEPTION
-            WHEN duplicate_column THEN RAISE NOTICE 'column omt_type already exists in network_type.';
+            WHEN duplicate_column THEN RAISE NOTICE 'column network_type already exists in network_type.';
         END;
     END;
 $$
@@ -13,9 +19,9 @@ $$
 UPDATE osm_route_member
 SET network_type =
     CASE
-      WHEN network = 'US:I' THEN 'us-interstate'
-      WHEN network = 'US:US' THEN 'us-highway'
-      WHEN network LIKE 'US:__' THEN 'us-state'
+      WHEN network = 'US:I' THEN 'us-interstate'::route_network_type
+      WHEN network = 'US:US' THEN 'us-highway'::route_network_type
+      WHEN network LIKE 'US:__' THEN 'us-state'::route_network_type
       ELSE NULL
     END
 ;

layers/transportation_name/transportation_name.yaml

@@ -12,7 +12,7 @@ layer:
     name_en: The english `name:en` value if available.
     ref: The OSM [`ref`](http://wiki.openstreetmap.org/wiki/Key:ref) tag of the motorway or road.
     ref_length: Length of the `ref` field. Useful for having a shield icon as background for labeling motorways.
-    network: The OSM [`network`](http://wiki.openstreetmap.org/wiki/Key:network) tag of the road.
+    network: The network type derived from [`network`](http://wiki.openstreetmap.org/wiki/Key:network) tag of the road.
     class:
       description: |
           Distinguish between more and less important roads.
@@ -32,7 +32,7 @@ layer:
   datasource:
     geometry_field: geometry
     srid: 900913
-    query: (SELECT geometry, name, name_en, ref, ref_length, class::text FROM layer_transportation_name(!bbox!, z(!scale_denominator!))) AS t
+    query: (SELECT geometry, name, name_en, ref, ref_length, network::text, class::text FROM layer_transportation_name(!bbox!, z(!scale_denominator!))) AS t
 schema:
   - ./network_type.sql
   - ./merge_highways.sql