layer:
  id: "housenumber"
  description: |
      Everything in OpenStreetMap which contains a `addr:housenumber` tag useful for labelling housenumbers on a map.
      This adds significant size to *z14*. For buildings the centroid of the building is used as housenumber.
      Duplicates within a tile are dropped if they have the same street/block_number (records without name tag are prioritized for preservation).
  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:
    housenumber: Value of the [`addr:housenumber`](http://wiki.openstreetmap.org/wiki/Key:addr) tag.
  datasource:
    geometry_field: geometry
    srid: 900913
    query: (SELECT geometry, housenumber FROM layer_housenumber(!bbox!, z(!scale_denominator!))) AS t
schema:
  - ./housenumber_centroid.sql
  - ./housenumber.sql
datasources:
  - type: imposm3
    mapping_file: ./mapping.yaml