layer:
  id: "poi"
  description: |
      POIs.
  buffer_size: 8
  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
  fields:
    class: String
  datasource:
    geometry_field: geometry
    srid: 900913
    query: (SELECT geometry, name, name_en, class, subclass, gridrank FROM layer_poi(!bbox!, z(!scale_denominator!), !pixel_width!)) AS t
schema:
  - ./class.sql
  - ./layer.sql
datasources:
  - type: imposm3
    mapping_file: ./mapping.yaml