layer:
  id: "obs_events"
  description: |
      Single overtaking events with attached measurements
  buffer_size: 4
  fields:
    distance_overtaker: |
      Overtaker distance (left side in right side traffic), in meters.
    distance_stationary: |
      Distance to stationary traffic (right side in right side traffic), in meters.
    direction: |
      -1 for driving backwards, 1 for forwards
    way_id: |
      The ID of the OSM way (road segment) that was determined for this event.
    course: |
      Direction of travel, as reported by GPS, in degree from North.
    speed: |
      Speed of travel, as reported by GPS, in meters per second (?).
    zone: |
      rural or urban
  defaults:
    srs: EPSG:3857
  datasource:
    srid: 3857
    geometry_field: geometry
    key_field: event_id
    key_field_as_attribute: no
    query: >
      (
        SELECT
          event_id, geometry, distance_overtaker, distance_stationary, direction, course, speed, zone, way_id
        FROM
          layer_obs_events(!bbox!, z(!scale_denominator!), user_id, min_time, max_time)
      ) AS t

schema:
  - ./layer.sql