diff --git a/src/upstage_des/data_types.py b/src/upstage_des/data_types.py
index 3554f6b..3ebc0cc 100644
--- a/src/upstage_des/data_types.py
+++ b/src/upstage_des/data_types.py
@@ -557,6 +557,15 @@ def make_location(self) -> CartesianLocation:
             x=self.x, y=self.y, z=self.z, use_altitude_units=self.use_altitude_unts
         )
 
+    def __eq__(self, value: Any) -> bool:
+        """Test for equality of two cartesian locations data objects."""
+        if not isinstance(value, CartesianLocationData):
+            raise ValueError(
+                f"Cannot compare a {value.__class__.__name__} to a CartesianLocationData"
+            )
+        check = ["x", "y", "z"]
+        return all(getattr(self, c) == getattr(value, c) for c in check)
+
 
 class GeodeticLocationData:
     """Object for storing geodetic data without an environment."""
@@ -596,3 +605,18 @@ def make_location(self) -> GeodeticLocation:
             alt=self.alt,
             in_radians=self.in_radians,
         )
+
+    def __eq__(self, value: Any) -> bool:
+        """Test for equality of two cartesian locations data objects."""
+        if not isinstance(value, GeodeticLocationData):
+            raise ValueError(
+                f"Cannot compare a {value.__class__.__name__} to a GeodeticLocationData"
+            )
+        other = [value.lat, value.lon]
+        if value.in_radians != self.in_radians:
+            if self.in_radians:
+                other = list(map(radians, other))
+            else:
+                other = list(map(degrees, other))
+        angles = [self.lat, self.lon] == other
+        return angles and self.alt == value.alt
diff --git a/src/upstage_des/test/test_data_types.py b/src/upstage_des/test/test_data_types.py
index 92e0b22..a1f1282 100644
--- a/src/upstage_des/test/test_data_types.py
+++ b/src/upstage_des/test/test_data_types.py
@@ -105,3 +105,39 @@ def test_geodetic() -> None:
 
         assert loc_up_rad - UP.GeodeticLocation(10, 10) > 0
         assert UP.GeodeticLocation(10, 10) - loc_up_rad > 0
+
+
+def test_data_objects() -> None:
+    cart1 = UP.CartesianLocationData(1.0, 2.1, 3.2)
+    cart2 = UP.CartesianLocationData(1.0, 2.1, 3.2)
+    assert cart1 == cart2
+
+    with pytest.raises(ValueError):
+        cart1 == (1.0, 2.1, 3.2)
+
+    geo1 = UP.GeodeticLocationData(13.0, 12.1, 11.2)
+    geo2 = UP.GeodeticLocationData(13.0, 12.1, 11.2)
+    assert geo1 == geo2
+
+    geo3 = UP.GeodeticLocationData(radians(13.0), radians(12.1), 11.2, in_radians=True)
+    assert geo1 == geo3
+    assert geo3 == geo1
+
+    with pytest.raises(ValueError):
+        geo1 == (13.0, 12.1, 11.2)
+
+    with UP.EnvironmentContext():
+        for k, v in STAGE_SETUP.items():
+            UP.add_stage_variable(k, v)
+
+        loc1 = geo1.make_location()
+        assert isinstance(loc1, UP.GeodeticLocation)
+
+        loc3 = geo3.make_location()
+
+        assert loc1 - loc3 == 0.0
+        assert loc1 == loc3
+
+        loc1 = cart1.make_location()
+        loc2 = cart2.make_location()
+        assert loc1 == loc2