Add st_isvalid check to imposm3 generalized tables

Fix #386

layers/transportation/mapping.yaml

@@ -22,12 +22,13 @@ generalized_tables:
 # etldoc: imposm3 -> osm_railway_linestring_gen1
   railway_linestring_gen1:
     source: railway_linestring
-    sql_filter: railway IN ('rail', 'narrow_gauge', 'light_rail') AND service=''
+    sql_filter: railway IN ('rail', 'narrow_gauge', 'light_rail') AND service='' AND ST_IsValid(geometry)
     tolerance: ZRES13
 
 # etldoc: imposm3 -> osm_aerialway_linestring_gen1
   aerialway_linestring_gen1:
     source: aerialway_linestring
+    sql_filter: ST_IsValid(geometry)
     tolerance: ZRES13
 
 # etldoc: imposm3 -> osm_shipway_linestring_gen2
@@ -38,6 +39,7 @@ generalized_tables:
 # etldoc: imposm3 -> osm_shipway_linestring_gen1
   shipway_linestring_gen1:
     source: shipway_linestring
+    sql_filter: ST_IsValid(geometry)
     tolerance: ZRES13
 
 # etldoc: imposm3 -> osm_highway_linestring_gen2
@@ -49,7 +51,7 @@ generalized_tables:
 # etldoc: imposm3 -> osm_highway_linestring_gen1
   highway_linestring_gen1:
     source: highway_linestring
-    sql_filter: highway IN ('motorway', 'trunk', 'primary', 'secondary', 'tertiary', 'motorway_link', 'trunk_link', 'primary_link', 'secondary_link', 'tertiary_link') AND NOT is_area
+    sql_filter: highway IN ('motorway', 'trunk', 'primary', 'secondary', 'tertiary', 'motorway_link', 'trunk_link', 'primary_link', 'secondary_link', 'tertiary_link') AND NOT is_area AND ST_IsValid(geometry)
     tolerance: ZRES12
 
 name_field: &name

layers/transportation/update_transportation_merge.sql

@@ -37,7 +37,7 @@ CREATE MATERIALIZED VIEW osm_transportation_merge_linestring AS (
           highway,
           min(z_order) AS z_order
       FROM osm_highway_linestring
-      WHERE highway IN ('motorway','trunk', 'primary')
+      WHERE highway IN ('motorway','trunk', 'primary') AND ST_IsValid(geometry)
       group by highway
     ) AS highway_union
 );