diff --git a/pygmt/datasets/earth_relief.py b/pygmt/datasets/earth_relief.py
index 9c248989f57..dacd6333966 100644
--- a/pygmt/datasets/earth_relief.py
+++ b/pygmt/datasets/earth_relief.py
@@ -66,8 +66,8 @@ def load_earth_relief(resolution="01d", region=None, registration=None, use_srtm
     Notes
     -----
     The :class:`xarray.DataArray` grid doesn't support slice operation, for
-    Earth relief data with resolutions higher than "05m", which are stored as
-    smaller tiles.
+    Earth relief data with resolutions of 5 arc-minutes or higher, which are
+    stored as smaller tiles.
 
     Examples
     --------