few more adjustments according to PR feeback

1. use WriteableTileArchive#bytesWritten in summmary as well
2. call WriteableTileArchive#init in a safer manner

..and rebase

planetiler-core/src/main/java/com/onthegomap/planetiler/Planetiler.java

@@ -756,7 +756,7 @@ public void run() throws Exception {
       stats.monitorFile("nodes", nodeDbPath);
       stats.monitorFile("features", featureDbPath);
       stats.monitorFile("multipolygons", multipolygonPath);
-      stats.monitorFile("archive", output.getLocalPath());
+      stats.monitorFile("archive", output.getLocalPath(), archive::bytesWritten);
 
       for (Stage stage : stages) {
         stage.task.run();

planetiler-core/src/main/java/com/onthegomap/planetiler/archive/TileArchiveWriter.java

@@ -150,6 +150,9 @@ public static void writeOutput(FeatureGroup features, WriteableTileArchive outpu
       .addBuffer("reader_queue", queueSize)
       .sinkTo("encode", processThreads, writer::tileEncoderSink);
 
+    // ensure to initialize the archive BEFORE starting to write any tiles
+    output.initialize();
+
     // the tile writer will wait on the result of each batch to ensure tiles are written in order
     WorkerPipeline<TileBatch> writeBranch = pipeline.readFromQueue(writerQueue)
       .sinkTo("write", tileWriteThreads, writer::tileWriter);
@@ -339,9 +342,6 @@ private void tileEncoderSink(Iterable<TileBatch> prev) throws IOException {
   private void tileWriter(Iterable<TileBatch> tileBatches) throws ExecutionException, InterruptedException {
 
     final boolean firstTileWriter = firstTileWriterTracker.compareAndExchange(true, false);
-    if (firstTileWriter) {
-      archive.initialize();
-    }
 
     var f = NumberFormat.getNumberInstance(Locale.getDefault());
     f.setMaximumFractionDigits(5);

planetiler-core/src/main/java/com/onthegomap/planetiler/files/WriteableFilesArchive.java

@@ -38,7 +38,7 @@
  * <pre>
  * --output=/path/to/tiles/ --files_tile_scheme={z}/{x}/{y}.pbf --files_metadata_path=/some/other/path/metadata.json
  * --output=/path/to/tiles/{z}/{x}/{y}.pbf
- * --output=/path/to/tiles?format=files&tile_scheme={z}/{x}/{y}.pbf
+ * --output=/path/to/tiles?format=files&amp;tile_scheme={z}/{x}/{y}.pbf
  * </pre>
  *
  * @see ReadableFilesArchive

planetiler-core/src/main/java/com/onthegomap/planetiler/stats/PrometheusStats.java

@@ -50,6 +50,7 @@ class PrometheusStats implements Stats {
   private ScheduledExecutorService executor;
   private final String job;
   private final Map<String, Path> filesToMonitor = new ConcurrentSkipListMap<>();
+  private final Map<String, LongSupplier> sizesOfFilesToMonitor = new ConcurrentSkipListMap<>();
   private final Map<String, Long> dataErrorCounters = new ConcurrentHashMap<>();
   private final Map<String, MemoryEstimator.HasEstimate> heapObjectsToMonitor = new ConcurrentSkipListMap<>();
 
@@ -175,6 +176,11 @@ public Map<String, Path> monitoredFiles() {
     return filesToMonitor;
   }
 
+  @Override
+  public Map<String, LongSupplier> monitoredFileSizes() {
+    return sizesOfFilesToMonitor;
+  }
+
   @Override
   public void monitorInMemoryObject(String name, MemoryEstimator.HasEstimate object) {
     heapObjectsToMonitor.put(name, object);
@@ -251,8 +257,10 @@ public List<MetricFamilySamples> collect() {
       for (var file : filesToMonitor.entrySet()) {
         String name = sanitizeMetricName(file.getKey());
         Path path = file.getValue();
+        var sizeSupplier = monitoredFileSizes().getOrDefault(file.getKey(), () -> FileUtils.size(path));
+        long size = sizeSupplier.getAsLong();
         results.add(new GaugeMetricFamily(BASE + "file_" + name + "_size_bytes", "Size of " + name + " in bytes",
-          FileUtils.size(path)));
+          size));
         if (Files.exists(path)) {
           try {
             FileStore fileStore = Files.getFileStore(path);

planetiler-core/src/main/java/com/onthegomap/planetiler/stats/Stats.java

@@ -60,7 +60,8 @@ default void printSummary() {
       timers().printSummary();
       logger.info("-".repeat(40));
       for (var entry : monitoredFiles().entrySet()) {
-        long size = FileUtils.size(entry.getValue());
+        var sizeSupplier = monitoredFileSizes().getOrDefault(entry.getKey(), () -> FileUtils.size(entry.getValue()));
+        long size = sizeSupplier.getAsLong();
         if (size > 0) {
           logger.info("\t{}\t{}B", entry.getKey(), format.storage(size, false));
         }
@@ -120,13 +121,23 @@ default Timers.Finishable startStage(String name, boolean log) {
   /** Returns all the files being monitored. */
   Map<String, Path> monitoredFiles();
 
+  Map<String, LongSupplier> monitoredFileSizes();
+
   /** Adds a stat that will track the size of a file or directory located at {@code path}. */
   default void monitorFile(String name, Path path) {
+    monitorFile(name, path, null);
+  }
+
+  default void monitorFile(String name, Path path, LongSupplier sizeProvider) {
     if (path != null) {
       monitoredFiles().put(name, path);
     }
+    if (sizeProvider != null) {
+      monitoredFileSizes().put(name, sizeProvider);
+    }
   }
 
+
   /** Adds a stat that will track the estimated in-memory size of {@code object}. */
   void monitorInMemoryObject(String name, MemoryEstimator.HasEstimate object);
 
@@ -189,6 +200,7 @@ private InMemory() {}
 
     private final Timers timers = new Timers();
     private final Map<String, Path> monitoredFiles = new ConcurrentSkipListMap<>();
+    private final Map<String, LongSupplier> monitoredFileSizes = new ConcurrentSkipListMap<>();
     private final Map<String, Long> dataErrors = new ConcurrentHashMap<>();
 
     @Override
@@ -204,6 +216,11 @@ public Map<String, Path> monitoredFiles() {
       return monitoredFiles;
     }
 
+    @Override
+    public Map<String, LongSupplier> monitoredFileSizes() {
+      return monitoredFileSizes;
+    }
+
     @Override
     public void monitorInMemoryObject(String name, MemoryEstimator.HasEstimate object) {}
 

planetiler-core/src/test/java/com/onthegomap/planetiler/pmtiles/PmtilesTest.java

@@ -221,8 +221,7 @@ void testRoundtripMetadata() throws IOException {
       "baselayer",
       TileArchiveMetadata.MVT_FORMAT,
       new Envelope(1.1, 2.2, 3.3, 4.4),
-      new CoordinateXY(5.5, 6.6),
-      7d,
+      new Coordinate(5.5, 6.6, 7d),
       8,
       9,
       TileArchiveMetadata.TileArchiveMetadataJson.create(