openmaptiles/layers/water/mapping.yaml

generalized_tables:
  # etldoc: osm_water_polygon_gen_z7 -> osm_water_polygon_gen_z6
  water_polygon_gen_z6:
    source: water_polygon_gen_z7
    sql_filter: area>power(ZRES5,2)
    tolerance: ZRES7

  # etldoc: osm_water_polygon_gen_z8 -> osm_water_polygon_gen_z7
  water_polygon_gen_z7:
    source: water_polygon_gen_z8
    sql_filter: area>power(ZRES6,2)
    tolerance: ZRES8

  # etldoc: osm_water_polygon_gen_z9 -> osm_water_polygon_gen_z8
  water_polygon_gen_z8:
    source: water_polygon_gen_z9
    sql_filter: area>power(ZRES7,2)
    tolerance: ZRES9

  # etldoc: osm_water_polygon_gen_z10 -> osm_water_polygon_gen_z9
  water_polygon_gen_z9:
    source: water_polygon_gen_z10
    sql_filter: area>power(ZRES8,2)
    tolerance: ZRES10

  # etldoc: osm_water_polygon_gen_z11 -> osm_water_polygon_gen_z10
  water_polygon_gen_z10:
    source: water_polygon_gen_z11
    sql_filter: area>power(ZRES9,2)
    tolerance: ZRES11

  # etldoc: osm_water_polygon -> osm_water_polygon_gen_z11
  water_polygon_gen_z11:
    source: water_polygon
    sql_filter: area>power(ZRES10,2)
    tolerance: ZRES12

tunnel_field: &tunnel
  key: tunnel
  name: is_tunnel
  type: bool
bridge_field: &bridge
  key: bridge
  name: is_bridge
  type: bool

tables:

  # etldoc: imposm3 -> osm_water_polygon
  water_polygon:
    columns:
    - name: osm_id
      type: id
    - name: geometry
      type: validated_geometry
    - name: area
      type: area
    - key: name
      name: name
      type: string
    - name: name_en
      key: name:en
      type: string
    - name: name_de
      key: name:de
      type: string
    - name: tags
      type: hstore_tags
    - name: place
      key: place
      type: string
    - name: natural
      key: natural
      type: string
    - name: landuse
      key: landuse
      type: string
    - name: waterway
      key: waterway
      type: string
    - name: leisure
      key: leisure
      type: string
    - name: water
      key: water
      type: string
    - name: is_intermittent
      key: intermittent
      type: bool
    - *tunnel
    - *bridge
    filters:
      reject:
        covered: ["yes"]
    mapping:
      landuse:
      - reservoir
      - basin
      - salt_pond
      leisure:
      - swimming_pool
      natural:
      - water
      - bay
      - spring
      waterway:
      - dock
      water:
      - river
      - stream
      - canal
      - ditch
      - drain
      - pond
      - basin
      - wastewater
    type: polygon