public String getDebugUrl(String pattern) {
    Coordinate center = getEnvelope().centre();
    DecimalFormat format = new DecimalFormat("0.#####", DecimalFormatSymbols.getInstance(Locale.US));
    return pattern
      .replaceAll("\\{(lat|latitude)}", format.format(center.y))
      .replaceAll("\\{(lon|longitude)}", format.format(center.x))
      .replaceAll("\\{(z|zoom)}", z + ".5");
  }
Returns a URL that displays the openstreetmap data for this tile.
planetiler-core/src/main/java/com/onthegomap/planetiler/geo/TileCoord.java