add line to docstring
@@ -38,7 +38,8 @@ class RegionGeom(Geom):
binsz_wcs : `float`
Angular bin size of the underlying `~WcsGeom` used to evaluate
quantities in the region. Default size is 0.01 deg. This default
- value is adequate for the majority of use cases.
+ value is adequate for the majority of use cases. If a wcs object
+ is provided, the input of binsz_wcs is overridden.
"""
is_image = False
