@Override
  public String attribution() {
    return """
      <a href="https://www.openstreetmap.org/copyright" target="_blank">&copy; OpenStreetMap</a>
      <a href="https://docs.overturemaps.org/attribution" target="_blank">&copy; Overture Maps Foundation</a>
      """
      .replace("\n", " ")
      .trim();
  }
Example basemap using <a href="https://overturemaps.org/">Overture Maps</a> data.
planetiler-examples/src/main/java/com/onthegomap/planetiler/examples/overture/OvertureBasemap.java