layer:
  id: "water_name"
  requires:
    tables:
      - ne_10m_geography_marine_polys
      - lake_centerline
  description: |
      Lake center lines for labelling lake bodies.
      This is based of the [osm-lakelines](https://github.com/openmaptiles/osm-lakelines) project
      which derives nice centerlines from OSM water bodies. Only the most important lakes contain labels.
  fields:
    name: The OSM [`name`](http://wiki.openstreetmap.org/wiki/Key:name) value of the water body.
    name_en: English name `name:en` if available, otherwise `name`.
    name_de: German name `name:de` if available, otherwise `name` or `name:en`.
    class:
      description: |
          Distinguish between `lake`, `ocean`, `bay`, `strait`, and `sea`.
      values:
      - lake
      - bay
      - strait
      - sea
      - ocean
    intermittent:
      description: |
        Mark with `1` if it is an [intermittent](http://wiki.openstreetmap.org/wiki/Key:intermittent) lake.
      values: [0, 1]
  buffer_size: 256
  srs: +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over
  datasource:
    geometry_field: geometry
    key_field: osm_id
    key_field_as_attribute: no
    srid: 900913
    query: (SELECT osm_id, geometry, name, name_en, name_de, {name_languages}, class, intermittent FROM layer_water_name(!bbox!, z(!scale_denominator!))) AS t
schema:
  - ./update_marine_point.sql
  - ./update_water_lakeline.sql
  - ./update_water_point.sql
  - ./water_name.sql
datasources:
  - type: imposm3
    mapping_file: ../water/mapping.yaml
  - type: imposm3
    mapping_file: ./mapping.yaml
