diff --git a/xee/ext.py b/xee/ext.py
index 71c793d..d5f5e99 100644
--- a/xee/ext.py
+++ b/xee/ext.py
@@ -595,7 +595,7 @@ def _process_coordinate_data(
           list(zip(data, itertools.cycle([coordinate_type]))),
       ):
         tiles[i] = arr.flatten()
-    return np.array(tiles)
+    return np.concatenate(tiles)
 
   def get_variables(self) -> utils.Frozen[str, xarray.Variable]:
     vars_ = [(name, self.open_store_variable(name)) for name in self._bands()]