public static String osmDebugUrl(int zoom, Coordinate coord) {
    return "https://www.openstreetmap.org/#map=%d/%.5f/%.5f".formatted(
      zoom,
      coord.y,
      coord.x
    );
  }
Returns an openstreetmap.org map link for a lat/lon
planetiler-core/src/main/java/com/onthegomap/planetiler/util/Format.java