diff --git a/cdm/src/main/java/ucar/nc2/iosp/netcdf3/N3iosp.java b/cdm/src/main/java/ucar/nc2/iosp/netcdf3/N3iosp.java
index e6159f6..36ecf82 100644
--- a/cdm/src/main/java/ucar/nc2/iosp/netcdf3/N3iosp.java
+++ b/cdm/src/main/java/ucar/nc2/iosp/netcdf3/N3iosp.java
@@ -411,6 +411,56 @@ public String NC_check_name(String name) {
   }
 
   /**
+   * query to see if this IOSP supports the getLocalityInformation() function
+   *
+   * @return a boolean indicating that this IOSP supports the getLocalityInformation() call
+   */
+  public boolean supportsLocalityInformation() { 
+    return true;
+  }
+
+  /**
+   * Returns an ArrayLong with each entry corresponding to the offset in the filestream
+   * of the same data cell in the section arguement to the function
+   *
+   * @param v2 the variable to get the data from
+   * @param section the record range to read
+   * @return an ArrayLong object that's the shape as the section arguement
+   * @throws InvalidRangeException on error
+   * @throws IOException on error
+   */
+  public ArrayLong getLocalityInformation(ucar.nc2.Variable v2, Section section)
+         throws InvalidRangeException, IOException {
+
+    // An array to hold the offsets that will be returned
+    ArrayLong array = new ArrayLong(section.getShape());
+
+    // Index into the results array
+    Index aIndex = array.getIndex();
+
+    // dataSize is used to increment the offsets within a given
+    // chunk appropriately
+    DataType type = v2.getDataType();
+    int dataSize = type.getSize();
+
+    Layout layout = getLayout(v2, section);
+
+    // iterate over all the chunks in the calculated Layout
+    while( layout.hasNext() ){
+      Layout.Chunk chunk = layout.next();
+
+      // iterate over the elements in this chunk
+      for( int i = 0; i < chunk.getNelems(); i++){
+        // write the offset into the results array, then iterate the index
+        array.setLong(aIndex, chunk.getSrcPos() + (i * dataSize));
+        aIndex.incr();
+      }
+    }
+
+    return array;
+  }
+
+  /**
    * Returns a Layout object for use by an N3iosp object
    *
    * @param v2 the variable to get the layout information for