Add ca-transcanada network type

layers/transportation/mapping.yaml

@@ -224,6 +224,7 @@ tables:
       type: member_type
     - *ref
     - *network
+    - *name
     mapping:
       route:
       - road

layers/transportation_name/merge_highways.sql

@@ -15,7 +15,7 @@ CREATE MATERIALIZED VIEW osm_transportation_name_network AS (
       COALESCE(NULLIF(hl.name_en, ''), hl.name) AS name_en,
       rm.network_type,
       CASE
-        WHEN rm.network_type is not null
+        WHEN (rm.network_type is not null AND nullif(rm.ref::text, '') is not null)
           then rm.ref::text
         else hl.ref
       end as ref,

layers/transportation_name/network_type.sql

@@ -8,7 +8,8 @@ DO $$
 BEGIN
     IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'route_network_type') THEN
         CREATE TYPE route_network_type AS ENUM (
-          'us-interstate', 'us-highway', 'us-state'
+          'us-interstate', 'us-highway', 'us-state',
+          'ca-transcanada'
         );
     END IF;
 END
@@ -33,6 +34,23 @@ SET network_type =
       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
+      -- https://en.wikipedia.org/wiki/Trans-Canada_Highway
+      -- TODO: improve hierarchical queries using
+      --    http://www.openstreetmap.org/relation/1307243
+      --    however the relation does not cover the whole Trans-Canada_Highway
+      WHEN
+          (network = 'CA:transcanada') OR
+          (network = 'CA:BC:primary' AND ref IN ('16')) OR
+          (name = 'Yellowhead Highway (AB)' AND ref IN ('16')) OR
+          (network = 'CA:SK' AND ref IN ('16')) OR
+          (network = 'CA:ON:primary' AND ref IN ('17', '417')) OR
+          (name = 'Route Transcanadienne (QC)') OR
+          (network = 'CA:NB' AND ref IN ('2', '16')) OR
+          (network = 'CA:PEI' AND ref IN ('1')) OR
+          (network = 'CA:NS' AND ref IN ('104', '105')) OR
+          (network = 'CA:NL:R' AND ref IN ('1')) OR
+          (name = '	Trans-Canada Highway (Super)')
+        THEN 'ca-transcanada'::route_network_type
       ELSE NULL
     END
 ;