fix: translation metadata output for multiscales export

pom.xml

@@ -87,8 +87,9 @@
 
 		<n5.version>3.2.0</n5.version>
 		<n5-hdf5.version>2.2.0</n5-hdf5.version>
+		<n5-imglib2.version>7.0.0</n5-imglib2.version>
 		<n5-google-cloud.version>4.1.0</n5-google-cloud.version>
-		<n5-universe.version>1.4.1</n5-universe.version>
+		<n5-universe.version>1.4.2-SNAPSHOT</n5-universe.version>
 		<n5-zarr.version>1.3.1</n5-zarr.version>
 		<n5-zstandard.version>1.0.2</n5-zstandard.version>
 	</properties>

src/main/java/org/janelia/saalfeldlab/n5/ij/N5ScalePyramidExporter.java

@@ -491,10 +491,15 @@ public <T extends RealType<T> & NativeType<T>, M extends N5DatasetMetadata, N ex
 			RandomAccessibleInterval<T> currentChannelImg = channelImgs.get(c);
 			final int nd = currentChannelImg.numDimensions();
 
+			final double[] relativeTranslation = new double[nd];
+
 			// every channel starts at the original scale level reset downsampling factors to 1
 			currentAbsoluteDownsampling = new long[nd];
 			Arrays.fill(currentAbsoluteDownsampling, 1);
 
+			final double[] baseResolution = new double[nd];
+			Arrays.fill(baseResolution, 1);
+
 			final N multiscaleMetadata = initializeMultiscaleMetadata((M)currentMetadata, channelDataset);
 			currentTranslation = new double[nd];
 
@@ -524,12 +529,13 @@ public <T extends RealType<T> & NativeType<T>, M extends N5DatasetMetadata, N ex
 							else
 								return 0.0;
 						});
+
+					if (downsampleMethod.equals(DOWN_AVERAGE))
+						Arrays.fill(relativeTranslation, 0.5);
 				}
 
 				// update metadata to reflect this scale level, returns new metadata instance
-
-				// TODO needs to be relative downsampling
-				currentMetadata = (M)metadataForThisScale(dset, currentMetadata, relativeFactors, currentTranslation);
+				currentMetadata = (M)metadataForThisScale(dset, currentMetadata, downsampleMethod, relativeFactors, relativeTranslation);
 
 				// write to the appropriate dataset
 				// if dataset exists and not overwritten, don't write metadata
@@ -626,15 +632,28 @@ protected boolean lastScale(final int[] chunkSize, final Interval imageDimension
 		return false;
 	}
 
-	@SuppressWarnings("unchecked")
-	protected <M extends N5DatasetMetadata> M metadataForThisScale(final String newPath, final M baseMetadata, final long[] downsamplingFactors,
+	protected <M extends N5DatasetMetadata> M metadataForThisScale(final String newPath, final M baseMetadata, 
+			final String downsampleMethod,
+			final long[] downsamplingFactors,
 			final double[] translation) {
 
+		return metadataForThisScale(newPath, baseMetadata, downsampleMethod,
+				Arrays.stream(downsamplingFactors).mapToDouble(x -> (double)x).toArray(),
+				translation);
+	}
+
+	@SuppressWarnings("unchecked")
+	protected <M extends N5DatasetMetadata> M metadataForThisScale(final String newPath, final M baseMetadata, 
+			final String downsampleMethod,
+			final double[] relativeFactor,
+			final double[] relativeTranslation) {
+
+
 		if (baseMetadata instanceof SpatialModifiable) {
 			return (M)(((SpatialModifiable<?>)baseMetadata).modifySpatialTransform(
 					newPath,
-					Arrays.stream(downsamplingFactors).mapToDouble(x -> (double)x).toArray(),
-					translation));
+					relativeFactor,
+					relativeTranslation));
 		}
 
 		// System.err.println("WARNING: metadata not spatial modifiable");
@@ -1092,7 +1111,7 @@ private Compression getCompression() {
 	private final boolean promptOverwrite(final String dataset) {
 
 		return JOptionPane.showConfirmDialog(null,
-				String.format("Dataset (%s) already exists. Completely remove that dataa and overwrite?", dataset), "Warning",
+				String.format("Dataset (%s) already exists. Completely remove that data and overwrite?", dataset), "Warning",
 				JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE) == JOptionPane.YES_OPTION;
 	}