Move highway and railway into transportation

Makefile

@@ -1,7 +1,7 @@
 all: build/openmaptiles.tm2source/data.yml build/mapping.yaml build/tileset.sql
 
 .PHONY: docs
-docs: layers/railway/README.md layers/boundary/README.md layers/water/README.md layers/building/README.md layers/highway/README.md layers/highway_name/README.md layers/poi/README.md layers/place/README.md layers/waterway/README.md layers/water_name/README.md layers/landcover/README.md layers/landuse/README.md layers/housenumber/README.md
+docs: layers/railway/README.md layers/boundary/README.md layers/water/README.md layers/building/README.md layers/transportation/README.md layers/transportation_name/README.md layers/poi/README.md layers/place/README.md layers/waterway/README.md layers/water_name/README.md layers/landcover/README.md layers/landuse/README.md layers/housenumber/README.md
 
 build/openmaptiles.tm2source/data.yml:
 	mkdir -p build/openmaptiles.tm2source && generate-tm2source openmaptiles.yaml --host="postgres" --port=5432 --database="openmaptiles" --user="openmaptiles" --password="openmaptiles" > build/openmaptiles.tm2source/data.yml
@@ -15,11 +15,11 @@ build/tileset.sql:
 layers/poi/README.md:
 	generate-doc layers/poi/poi.yaml --diagram layers/poi/mapping > layers/poi/README.md
 
-layers/highway/README.md:
+layers/transportation/README.md:
-	generate-doc layers/highway/highway.yaml --diagram layers/highway/mapping > layers/highway/README.md
+	generate-doc layers/transportation/transportation.yaml --diagram layers/transportation/mapping > layers/transportation/README.md
 
-layers/highway_name/README.md:
+layers/transportation_name/README.md:
-	generate-doc layers/highway_name/highway_name.yaml > layers/highway_name/README.md
+	generate-doc layers/transportation_name/transportation_name.yaml > layers/transportation_name/README.md
 
 layers/railway/README.md:
 	generate-doc layers/railway/railway.yaml --diagram layers/railway/mapping > layers/railway/README.md
@@ -52,4 +52,4 @@ layers/housenumber/README.md:
 	generate-doc layers/housenumber/housenumber.yaml > layers/housenumber/README.md
 
 clean:
-	rm -f build/openmaptiles.tm2source/data.yml && rm -f build/mapping.yaml && rm -f build/tileset.sql && rm -f layers/**/README.md&& rm -f layers/**/*.png
+	rm -f build/openmaptiles.tm2source/data.yml && rm -f build/mapping.yaml && rm -f build/tileset.sql

layers/highway_name/layer.sql

@@ -1,50 +0,0 @@
-
--- etldoc: layer_highway_name[shape=record fillcolor=lightpink, style="rounded,filled",  
--- etldoc:     label="layer_highway_name | <z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14_> z14_" ] ;
-
-CREATE OR REPLACE FUNCTION layer_highway_name(bbox geometry, zoom_level integer)
-RETURNS TABLE(osm_id bigint, geometry geometry, name text, ref text, ref_length int, class highway_class, subclass text) AS $$
-    SELECT osm_id, geometry, name,
-      NULLIF(ref, ''), NULLIF(LENGTH(ref), 0) AS ref_length,
-      to_highway_class(highway) AS class, highway AS subclass
-    FROM (
-
-        -- etldoc: osm_highway_name_linestring_gen3 ->  layer_highway_name:z8
-        SELECT * FROM osm_highway_name_linestring_gen3
-        WHERE zoom_level = 8
-        UNION ALL
-
-        -- etldoc: osm_highway_name_linestring_gen2 ->  layer_highway_name:z9
-        SELECT * FROM osm_highway_name_linestring_gen2
-        WHERE zoom_level = 9
-        UNION ALL
-
-        -- etldoc: osm_highway_name_linestring_gen1 ->  layer_highway_name:z10 
-        -- etldoc: osm_highway_name_linestring_gen1 ->  layer_highway_name:z11          
-        SELECT * FROM osm_highway_name_linestring_gen1
-        WHERE zoom_level BETWEEN 10 AND 11
-        UNION ALL
-
-        -- etldoc: osm_highway_name_linestring ->  layer_highway_name:z12        
-        SELECT * FROM osm_highway_name_linestring
-        WHERE zoom_level = 12
-            AND LineLabel(zoom_level, COALESCE(NULLIF(name, ''), ref), geometry)
-            AND to_highway_class(highway) < 'minor_road'::highway_class
-            AND NOT highway_is_link(highway)
-        UNION ALL
-
-        -- etldoc: osm_highway_name_linestring ->  layer_highway_name:z13
-        SELECT * FROM osm_highway_name_linestring
-        WHERE zoom_level = 13
-            AND LineLabel(zoom_level, COALESCE(NULLIF(name, ''), ref), geometry)
-            AND to_highway_class(highway) < 'path'::highway_class
-        UNION ALL
-
-        -- etldoc: osm_highway_name_linestring ->  layer_highway_name:z14_
-        SELECT * FROM osm_highway_name_linestring
-        WHERE zoom_level >= 14
-
-    ) AS zoom_levels
-    WHERE geometry && bbox
-    ORDER BY z_order ASC;
-$$ LANGUAGE SQL IMMUTABLE;

layers/highway_name/merge_highways.sql

@@ -1,57 +0,0 @@
--- Instead of using relations to find out the road names we
--- stitch together the touching ways with the same name
--- to allow for nice label rendering
--- Because this works well for roads that do not have relations as well
-
--- etldoc: osm_highway_linestring ->  osm_highway_name_linestring
-CREATE TABLE IF NOT EXISTS osm_highway_name_linestring AS (
-	SELECT
-		(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,
-		name,
-        ref,
-		highway,
-		z_order
-	FROM (
-		SELECT
-			ST_LineMerge(ST_Union(geometry)) AS geometry,
-			name,
-            ref,
-			highway,
-			min(z_order) AS z_order,
-			array_agg(DISTINCT osm_id) AS member_osm_ids
-	    FROM osm_highway_linestring
-        -- We only care about roads for labelling
-	    WHERE name <> '' OR ref <> ''
-	    GROUP BY name, highway, ref
-	) AS highway_union
-);
-
-CREATE INDEX IF NOT EXISTS osm_highway_name_linestring_geometry_idx ON osm_highway_name_linestring USING gist(geometry);
-
--- etldoc: osm_highway_name_linestring -> osm_highway_name_linestring_gen1 
-CREATE TABLE IF NOT EXISTS osm_highway_name_linestring_gen1 AS (
-    SELECT ST_Simplify(geometry, 50) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
-    FROM osm_highway_name_linestring
-    WHERE highway IN ('motorway','trunk')  AND ST_Length(geometry) > 8000
-);
-CREATE INDEX IF NOT EXISTS osm_highway_name_linestring_gen1_geometry_idx ON osm_highway_name_linestring_gen1 USING gist(geometry);
-
--- etldoc: osm_highway_name_linestring_gen1 -> osm_highway_name_linestring_gen2
-CREATE TABLE IF NOT EXISTS osm_highway_name_linestring_gen2 AS (
-    SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
-    FROM osm_highway_name_linestring_gen1
-    WHERE highway IN ('motorway','trunk')  AND ST_Length(geometry) > 14000
-);
-CREATE INDEX IF NOT EXISTS osm_highway_name_linestring_gen2_geometry_idx ON osm_highway_name_linestring_gen2 USING gist(geometry);
-
--- etldoc: osm_highway_name_linestring_gen2 -> osm_highway_name_linestring_gen3
-CREATE TABLE IF NOT EXISTS osm_highway_name_linestring_gen3 AS (
-    SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
-    FROM osm_highway_name_linestring_gen2
-    WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
-);
-CREATE INDEX IF NOT EXISTS osm_highway_name_linestring_gen3_geometry_idx ON osm_highway_name_linestring_gen3 USING gist(geometry);

layers/railway/README.md

@@ -1,19 +0,0 @@
-# railway
-
-The `railway` layer contains linestrings marking tracks from [OSM Railways](http://wiki.openstreetmap.org/wiki/Railways).
-It contains tracks for [passenger and freight trains]() and smaller tracks for [Trams](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dtram) or [similar](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dlight_rail) vehicles. But also tracks for [subways](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dsubway), [narrow-gauge trains](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dnarrow_gauge) or [historic trains](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dpreserved).
-Non mainline tracks (marked with class `minor_rail`) used for [storage of trains](http://wiki.openstreetmap.org/wiki/Tag:service%3Dyard) and [maintenance](http://wiki.openstreetmap.org/wiki/Tag:service%3Dsiding) are contained in the highest zoom levels and should be styled more subtle than the mainline tracks with class `rail`.
-
-## Fields
-
-- **class**: Divides the track into mainline tracks (class `rail`) and less important tracks
-used for maintenance (class `minor_rail`).
-- **subclass**: Original value of the [`railway`](http://wiki.openstreetmap.org/wiki/Key:railway) can be one of
-`rail`, `light_rail`, `subway`, `narrow_gauge`, `preserved`, `tram`.
-- **properties**: Additional properties describing the nature of tracks. Can be either `bridge` or `tunnel`.
-
-## Mapping
-
-![](mapping.png)
-
-

layers/railway/mapping

@@ -1,14 +0,0 @@
-digraph "Imposm Mapping" {
-	graph [rankdir=LR ranksep=3]
-		subgraph railway_linestring {
-			node [fixed_size=shape "width:"=20]
-				railway_linestring [shape=box]
-				key_railway [label=railway shape=box]
-					key_railway -> railway_linestring [label="rail
-light_rail
-subway
-narrow_gauge
-preserved
-tram"]
-		}
-}

layers/railway/mapping.yaml

@@ -1,34 +0,0 @@
-tables:
-  # etldoc: imposm3 -> osm_railway_linestring
-  railway_linestring:
-    type: linestring
-    fields:
-    - name: osm_id
-      type: id
-    - name: geometry
-      type: geometry
-    - key: railway
-      name: railway
-      type: string
-    - name: z_order
-      type: wayzorder
-    - key: tunnel
-      name: is_tunnel
-      type: bool
-    - key: bridge
-      name: is_bridge
-      type: bool
-    - key: service
-      name: service
-      type: string
-    - key: usage
-      name: usage
-      type: string
-    mapping:
-      railway:
-      - rail
-      - light_rail
-      - subway
-      - narrow_gauge
-      - preserved
-      - tram

layers/railway/railway.sql

@@ -1,35 +0,0 @@
-CREATE OR REPLACE FUNCTION railway_class(railway text, service text) RETURNS TEXT AS $$
-    SELECT CASE
-        WHEN railway='rail' AND service='' THEN 'rail'
-        ELSE 'minor_rail'
-    END;
-$$ LANGUAGE SQL IMMUTABLE;
-
-CREATE OR REPLACE FUNCTION railway_brunnel(is_bridge boolean, is_tunnel boolean) RETURNS TEXT AS $$
-    SELECT CASE
-         WHEN is_bridge THEN 'bridge'
-         WHEN is_tunnel THEN 'tunnel'
-        ELSE NULL
-    END;
-$$ LANGUAGE SQL IMMUTABLE;
-
--- etldoc: layer_railway[shape=record fillcolor=lightpink, style="rounded,filled",  
--- etldoc:     label="layer_railway | <z13> z13 | <z14_> z14_" ] ;
-
-CREATE OR REPLACE FUNCTION layer_railway(bbox geometry, zoom_level int)
-RETURNS TABLE(osm_id bigint, geometry geometry, class text, subclass text, properties railway_properties) AS $$
-    SELECT osm_id, geometry,
-        railway_class(railway, service) AS class,
-        railway AS subclass,
-        to_railway_properties(is_bridge, is_tunnel) AS properties
-    FROM (
-        -- etldoc: osm_railway_linestring ->  layer_railway :z13 
-        SELECT * FROM osm_railway_linestring
-        WHERE zoom_level = 13 AND railway = 'rail' AND service=''
-        UNION ALL
-        -- etldoc: osm_railway_linestring ->  layer_railway :z14_        
-        SELECT * FROM osm_railway_linestring WHERE zoom_level >= 14
-    ) AS zoom_levels
-    WHERE geometry && bbox
-    ORDER BY z_order ASC;
-$$ LANGUAGE SQL IMMUTABLE;

layers/railway/railway.yaml

@@ -1,25 +0,0 @@
-layer:
-  id: "railway"
-  description: |
-      The `railway` layer contains linestrings marking tracks from [OSM Railways](http://wiki.openstreetmap.org/wiki/Railways).
-      It contains tracks for [passenger and freight trains]() and smaller tracks for [Trams](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dtram) or [similar](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dlight_rail) vehicles. But also tracks for [subways](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dsubway), [narrow-gauge trains](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dnarrow_gauge) or [historic trains](http://wiki.openstreetmap.org/wiki/Tag:railway%3Dpreserved).
-      Non mainline tracks (marked with class `minor_rail`) used for [storage of trains](http://wiki.openstreetmap.org/wiki/Tag:service%3Dyard) and [maintenance](http://wiki.openstreetmap.org/wiki/Tag:service%3Dsiding) are contained in the highest zoom levels and should be styled more subtle than the mainline tracks with class `rail`.
-  fields:
-    class: |
-        Divides the track into mainline tracks (class `rail`) and less important tracks
-        used for maintenance (class `minor_rail`).
-    subclass: |
-        Original value of the [`railway`](http://wiki.openstreetmap.org/wiki/Key:railway) can be one of
-        `rail`, `light_rail`, `subway`, `narrow_gauge`, `preserved`, `tram`.
-    properties: |
-        Additional properties describing the nature of tracks. Can be either `bridge` or `tunnel`.
-  buffer_size: 4
-  datasource:
-    geometry_field: geometry
-    query: (SELECT geometry, class, subclass, properties::text FROM layer_railway(!bbox!, z(!scale_denominator!))) AS t
-schema:
-  - ./types.sql
-  - ./railway.sql
-datasources:
-  - type: imposm3
-    mapping_file: ./mapping.yaml

layers/railway/types.sql

@@ -1,15 +0,0 @@
-DO $$
-BEGIN
-    IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'railway_properties') THEN
-        CREATE TYPE railway_properties AS ENUM ('bridge', 'tunnel');
-    END IF;
-END
-$$;
-
-CREATE OR REPLACE FUNCTION to_railway_properties(is_bridge boolean, is_tunnel boolean) RETURNS railway_properties AS $$
-    SELECT CASE
-         WHEN is_bridge THEN 'bridge'::railway_properties
-         WHEN is_tunnel THEN 'tunnel'::railway_properties
-        ELSE NULL
-    END;
-$$ LANGUAGE SQL IMMUTABLE;

layers/transportation/highway.sql

@@ -1,13 +1,11 @@
- 
-
 CREATE OR REPLACE FUNCTION highway_is_link(highway TEXT) RETURNS BOOLEAN AS $$
     SELECT highway LIKE '%_link';
 $$ LANGUAGE SQL IMMUTABLE STRICT;
 
 
--- etldoc: layer_highway[shape=record fillcolor=lightpink, style="rounded,filled",  
+-- etldoc: layer_transportation[shape=record fillcolor=lightpink, style="rounded,filled",
--- etldoc:     label="<sql> layer_highway |<z4z7> z4-z7 |<z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14_> z14_" ] ;
+-- etldoc:     label="<sql> layer_transportation |<z4z7> z4-z7 |<z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14_> z14_" ] ;
-CREATE OR REPLACE FUNCTION layer_highway(bbox geometry, zoom_level int)
+CREATE OR REPLACE FUNCTION layer_transportation(bbox geometry, zoom_level int)
 RETURNS TABLE(osm_id bigint, geometry geometry, class highway_class, subclass text, properties highway_properties) AS $$
     SELECT
 		osm_id, geometry,
@@ -15,7 +13,7 @@ RETURNS TABLE(osm_id bigint, geometry geometry, class highway_class, subclass te
 		to_highway_properties(is_bridge, is_tunnel, is_ford, is_ramp, is_oneway) AS properties
 	FROM (
 
-		-- etldoc: ne_10m_global_roads ->  layer_highway:z4z7
+		-- etldoc: ne_10m_global_roads ->  layer_transportation:z4z7
 		SELECT
 			NULL::bigint AS osm_id, geometry, highway,
 			FALSE AS is_bridge, FALSE AS is_tunnel, FALSE AS is_ford, FALSE AS is_ramp, FALSE AS is_oneway,
@@ -24,59 +22,59 @@ RETURNS TABLE(osm_id bigint, geometry geometry, class highway_class, subclass te
 		WHERE zoom_level BETWEEN 4 AND 7 AND scalerank <= 1 + zoom_level
 		UNION ALL
 
-		-- etldoc: osm_highway_linestring_gen4  ->  layer_highway:z8
+		-- etldoc: osm_transportation_linestring_gen4  ->  layer_transportation:z8
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring_gen4
+        FROM osm_transportation_linestring_gen4
 		WHERE zoom_level = 8
 		UNION ALL
 
-		-- etldoc: osm_highway_linestring_gen3  ->  layer_highway:z9
+		-- etldoc: osm_transportation_linestring_gen3  ->  layer_transportation:z9
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring_gen3
+        FROM osm_transportation_linestring_gen3
 		WHERE zoom_level = 9
 		UNION ALL
 
-		-- etldoc: osm_highway_linestring_gen2  ->  layer_highway:z10
+		-- etldoc: osm_transportation_linestring_gen2  ->  layer_transportation:z10
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring_gen2
+        FROM osm_transportation_linestring_gen2
 		WHERE zoom_level = 10
 		UNION ALL
 
-		-- etldoc: osm_highway_linestring_gen1  ->  layer_highway:z11
+		-- etldoc: osm_transportation_linestring_gen1  ->  layer_transportation:z11
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring_gen1
+        FROM osm_transportation_linestring_gen1
 		WHERE zoom_level = 11
 		UNION ALL
 
-		-- etldoc: osm_highway_linestring       ->  layer_highway:z12
+		-- etldoc: osm_transportation_linestring       ->  layer_transportation:z12
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring
+        FROM osm_transportation_linestring
 		WHERE zoom_level = 12
             AND (to_highway_class(highway) < 'minor_road'::highway_class OR highway IN ('unclassified', 'residential'))
             AND NOT highway_is_link(highway)
             AND NOT is_area
         UNION ALL
 
-		-- etldoc: osm_highway_linestring       ->  layer_highway:z13
+		-- etldoc: osm_transportation_linestring       ->  layer_transportation:z13
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring
+        FROM osm_transportation_linestring
 		WHERE zoom_level = 13
             AND to_highway_class(highway) < 'path'::highway_class
             AND NOT is_area
         UNION ALL
 
-		-- etldoc: osm_highway_linestring       ->  layer_highway:z14_
+		-- etldoc: osm_transportation_linestring       ->  layer_transportation:z14_
 		SELECT osm_id, geometry, highway, is_bridge, is_tunnel, is_ford, is_ramp, is_oneway, z_order
-        FROM osm_highway_linestring
+        FROM osm_transportation_linestring
 		WHERE zoom_level >= 14 AND NOT is_area
         UNION ALL
 
         -- NOTE: We limit the selection of polys because we need to be careful to net get false positives here because
         -- it is possible that closed linestrings appear both as highway linestrings and as polygon
-        -- etldoc: osm_highway_polygon          ->  layer_highway:z13
+        -- etldoc: osm_transportation__polygon          ->  layer_transportation:z13
-        -- etldoc: osm_highway_polygon          ->  layer_highway:z14_
+        -- etldoc: osm_transportation__polygon          ->  layer_transportation:z14_
 		SELECT osm_id, geometry, highway, FALSE AS is_bridge, FALSE AS is_tunnel, FALSE AS is_ford, FALSE AS is_ramp, FALSE AS is_oneway, z_order
-        FROM osm_highway_polygon
+        FROM osm_transportation_polygon
         -- We do not want underground pedestrian areas for now
 		WHERE zoom_level >= 13 AND is_area AND COALESCE(layer, 0) >= 0
     ) AS zoom_levels

layers/transportation/mapping

@@ -0,0 +1,39 @@
+digraph "Imposm Mapping" {
+	graph [rankdir=LR ranksep=3]
+		subgraph highway_polygon {
+			node [fixed_size=shape "width:"=20]
+				highway_polygon [shape=box]
+				key_highway [label=highway shape=box]
+					key_highway -> highway_polygon [label=pedestrian]
+		}
+		subgraph highway_linestring {
+			node [fixed_size=shape "width:"=20]
+				highway_linestring [shape=box]
+				key_highway [label=highway shape=box]
+					key_highway -> highway_linestring [label="motorway
+motorway_link
+trunk
+trunk_link
+primary
+primary_link
+secondary
+secondary_link
+tertiary
+tertiary_link
+unclassified
+residential
+road
+living_street
+raceway
+construction
+track
+service
+path
+cycleway
+bridleway
+footway
+corridor
+crossing
+pedestrian"]
+		}
+}

layers/transportation/mapping.yaml

@@ -1,33 +1,33 @@
 
 generalized_tables:
 
-# etldoc: imposm3 -> osm_highway_linestring_gen4
+# etldoc: imposm3 -> osm_transportation_linestring_gen4
-  highway_linestring_gen4:
+  transportation_linestring_gen4:
-    source: highway_linestring_gen3
+    source: transportation_linestring_gen3
     sql_filter: highway IN ('motorway','trunk') AND NOT is_area
     tolerance: 200.0
 
-# etldoc: imposm3 -> osm_highway_linestring_gen3    
+# etldoc: imposm3 -> osm_transportation_linestring_gen3
-  highway_linestring_gen3:
+  transportation_linestring_gen3:
-    source: highway_linestring_gen2
+    source: transportation_linestring_gen2
     sql_filter: highway IN ('motorway','trunk', 'primary') AND NOT is_area
     tolerance: 120.0
 
-# etldoc: imposm3 -> osm_highway_linestring_gen2    
+# etldoc: imposm3 -> osm_transportation_linestring_gen2
-  highway_linestring_gen2:
+  transportation_linestring_gen2:
-    source: highway_linestring_gen1
+    source: transportation_linestring_gen1
     sql_filter: highway IN ('motorway','trunk', 'primary', 'secondary') AND NOT is_area
     tolerance: 50.0
 
-# etldoc: imposm3 -> osm_highway_linestring_gen1    
+# etldoc: imposm3 -> osm_transportation_linestring_gen1
-  highway_linestring_gen1:
+  transportation_linestring_gen1:
-    source: highway_linestring
+    source: transportation_linestring
     sql_filter: highway IN ('motorway','trunk', 'primary', 'secondary', 'tertiary') AND NOT is_area
     tolerance: 20.0
 
 tables:
-# etldoc: imposm3 -> osm_highway_linestring
+# etldoc: imposm3 -> osm_transportation_linestring
-  highway_linestring:
+  transportation_linestring:
     type: linestring
     fields:
     - name: osm_id
@@ -37,6 +37,9 @@ tables:
     - name: highway
       key: highway
       type: string
+    - key: railway
+      name: railway
+      type: string
     - key: ref
       name: ref
       type: string
@@ -63,12 +66,21 @@ tables:
     - key: name
       name: name
       type: string
+    - key: short_name
+      name: short_name
+      type: string
     - name: name_en
       key: name:en
       type: string
     - name: is_area
       key: area
       type: bool
+    - key: service
+      name: service
+      type: string
+    - key: usage
+      name: usage
+      type: string
     mapping:
       highway:
       - motorway
@@ -96,9 +108,16 @@ tables:
       - corridor
       - crossing
       - pedestrian
+      railway:
+      - rail
+      - light_rail
+      - subway
+      - narrow_gauge
+      - preserved
+      - tram
 
-# etldoc: imposm3 -> osm_highway_polygon     
+# etldoc: imposm3 -> osm_transportation_polygon
-  highway_polygon:
+  transportation_polygon:
     type: polygon
     fields:
     - name: osm_id

layers/transportation/transportation.yaml

@@ -1,5 +1,5 @@
 layer:
-  id: "highway"
+  id: "transportation"
   description: |
       Roads or [`highway`](http://wiki.openstreetmap.org/wiki/Key:highway) in OpenStreetMap lingo.
       This layer is directly derived from the OSM road hierarchy which is why it is called `highway`. Only
@@ -29,7 +29,7 @@ layer:
   datasource:
     geometry_field: geometry
     srid: 900913
-    query: (SELECT geometry, class::text, subclass, properties::text FROM layer_highway(!bbox!, z(!scale_denominator!))) AS t
+    query: (SELECT geometry, class::text, subclass, properties::text FROM layer_transportation(!bbox!, z(!scale_denominator!))) AS t
 schema:
   - ./types.sql
   - ./ne_global_roads.sql

layers/transportation_name/layer.sql

@@ -0,0 +1,50 @@
+
+-- etldoc: layer_transportation_name[shape=record fillcolor=lightpink, style="rounded,filled",
+-- etldoc:     label="layer_transportation_name | <z8> z8 |<z9> z9 |<z10> z10 |<z11> z11 |<z12> z12|<z13> z13|<z14_> z14_" ] ;
+
+CREATE OR REPLACE FUNCTION layer_transportation_name(bbox geometry, zoom_level integer)
+RETURNS TABLE(osm_id bigint, geometry geometry, name text, ref text, ref_length int, class highway_class, subclass text) AS $$
+    SELECT osm_id, geometry, name,
+      NULLIF(ref, ''), NULLIF(LENGTH(ref), 0) AS ref_length,
+      to_highway_class(highway) AS class, highway AS subclass
+    FROM (
+
+        -- etldoc: osm_transportation_name_linestring_gen3 ->  layer_transportation_name:z8
+        SELECT * FROM osm_transportation_name_linestring_gen3
+        WHERE zoom_level = 8
+        UNION ALL
+
+        -- etldoc: osm_transportation_name_linestring_gen2 ->  layer_transportation_name:z9
+        SELECT * FROM osm_transportation_name_linestring_gen2
+        WHERE zoom_level = 9
+        UNION ALL
+
+        -- etldoc: osm_transportation_name_linestring_gen1 ->  layer_transportation_name:z10
+        -- etldoc: osm_transportation_name_linestring_gen1 ->  layer_transportation_name:z11
+        SELECT * FROM osm_transportation_name_linestring_gen1
+        WHERE zoom_level BETWEEN 10 AND 11
+        UNION ALL
+
+        -- etldoc: osm_transportation_name_linestring ->  layer_transportation_name:z12
+        SELECT * FROM osm_transportation_name_linestring
+        WHERE zoom_level = 12
+            AND LineLabel(zoom_level, COALESCE(NULLIF(name, ''), ref), geometry)
+            AND to_highway_class(highway) < 'minor_road'::highway_class
+            AND NOT highway_is_link(highway)
+        UNION ALL
+
+        -- etldoc: osm_transportation_name_linestring ->  layer_transportation_name:z13
+        SELECT * FROM osm_transportation_name_linestring
+        WHERE zoom_level = 13
+            AND LineLabel(zoom_level, COALESCE(NULLIF(name, ''), ref), geometry)
+            AND to_highway_class(highway) < 'path'::highway_class
+        UNION ALL
+
+        -- etldoc: osm_transportation_name_linestring ->  layer_transportation_name:z14_
+        SELECT * FROM osm_transportation_name_linestring
+        WHERE zoom_level >= 14
+
+    ) AS zoom_levels
+    WHERE geometry && bbox
+    ORDER BY z_order ASC;
+$$ LANGUAGE SQL IMMUTABLE;

layers/transportation_name/merge_highways.sql

@@ -0,0 +1,57 @@
+-- Instead of using relations to find out the road names we
+-- stitch together the touching ways with the same name
+-- to allow for nice label rendering
+-- Because this works well for roads that do not have relations as well
+
+-- etldoc: osm_transportation_linestring ->  osm_transportation_name_linestring
+CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring AS (
+	SELECT
+		(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,
+		name,
+        ref,
+		highway,
+		z_order
+	FROM (
+		SELECT
+			ST_LineMerge(ST_Union(geometry)) AS geometry,
+			name,
+            ref,
+			highway,
+			min(z_order) AS z_order,
+			array_agg(DISTINCT osm_id) AS member_osm_ids
+	    FROM osm_transportation_linestring
+        -- We only care about highways (not railways) for labeling
+	    WHERE (name <> '' OR ref <> '') AND NULLIF(highway, '') IS NOT NULL
+	    GROUP BY name, highway, ref
+	) AS highway_union
+);
+
+CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_geometry_idx ON osm_transportation_name_linestring USING gist(geometry);
+
+-- etldoc: osm_transportation_name_linestring -> osm_transportation_name_linestring_gen1
+CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen1 AS (
+    SELECT ST_Simplify(geometry, 50) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
+    FROM osm_transportation_name_linestring
+    WHERE highway IN ('motorway','trunk')  AND ST_Length(geometry) > 8000
+);
+CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen1_geometry_idx ON osm_transportation_name_linestring_gen1 USING gist(geometry);
+
+-- etldoc: osm_transportation_name_linestring_gen1 -> osm_transportation_name_linestring_gen2
+CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen2 AS (
+    SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
+    FROM osm_transportation_name_linestring_gen1
+    WHERE highway IN ('motorway','trunk')  AND ST_Length(geometry) > 14000
+);
+CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen2_geometry_idx ON osm_transportation_name_linestring_gen2 USING gist(geometry);
+
+-- etldoc: osm_transportation_name_linestring_gen2 -> osm_transportation_name_linestring_gen3
+CREATE TABLE IF NOT EXISTS osm_transportation_name_linestring_gen3 AS (
+    SELECT ST_Simplify(geometry, 120) AS geometry, osm_id, member_osm_ids, name, ref, highway, z_order
+    FROM osm_transportation_name_linestring_gen2
+    WHERE highway = 'motorway' AND ST_Length(geometry) > 20000
+);
+CREATE INDEX IF NOT EXISTS osm_transportation_name_linestring_gen3_geometry_idx ON osm_transportation_name_linestring_gen3 USING gist(geometry);

layers/transportation_name/transportation_name.yaml

@@ -1,5 +1,5 @@
 layer:
-  id: "highway_name"
+  id: "transportation_name"
   description: |
       This is the layer for labelling the highways. Only highways that are named `name=*` and are long enough
       to place text upon appear. The OSM roads are stitched together if they contain the same name
@@ -20,10 +20,10 @@ layer:
   datasource:
     geometry_field: geometry
     srid: 900913
-    query: (SELECT geometry, name, ref, ref_length, class::text, subclass FROM layer_highway_name(!bbox!, z(!scale_denominator!))) AS t
+    query: (SELECT geometry, name, ref, ref_length, class::text, subclass FROM layer_transportation_name(!bbox!, z(!scale_denominator!))) AS t
 schema:
   - ./merge_highways.sql
   - ./layer.sql
 datasources:
   - type: imposm3
-    mapping_file: ../highway/mapping.yaml
+    mapping_file: ../transportation/mapping.yaml

openmaptiles.yaml

@@ -1,13 +1,12 @@
 tileset:
   layers:
     - layers/boundary/boundary.yaml
-    - layers/highway/highway.yaml
+    - layers/transportation/transportation.yaml
-    - layers/highway_name/highway_name.yaml
+    - layers/transportation_name/transportation_name.yaml
     - layers/building/building.yaml
     - layers/housenumber/housenumber.yaml
     - layers/place/place.yaml
     - layers/poi/poi.yaml
-    - layers/railway/railway.yaml
     - layers/water_name/water_name.yaml
     - layers/water/water.yaml
     - layers/waterway/waterway.yaml