layer:
  id: "obs_regions"
  description: |
      Statistics on administrative boundary areas ("regions")
  buffer_size: 4
  fields:
    overtaking_event_count: |
      Number of overtaking events.
    name: |
      Name of the region
    admin_level: |
      Administrative level of the boundary, as tagged in OpenStreetMap
  defaults:
    srs: EPSG:3785
  datasource:
    srid: 3857
    geometry_field: geometry
    key_field: region_id
    key_field_as_attribute: no
    query: (SELECT region_id, geometry, name, admin_level, overtaking_event_count FROM layer_obs_regions(!bbox!, z(!scale_denominator!))) AS t

schema:
  - ./layer.sql