diff --git a/mapillary_tools/process_sequence_properties.py b/mapillary_tools/process_sequence_properties.py
index 27ca1a4cc..ff039a41e 100644
--- a/mapillary_tools/process_sequence_properties.py
+++ b/mapillary_tools/process_sequence_properties.py
@@ -46,8 +46,8 @@ def cut_sequence_by_time_distance(
 
 def duplication_check(
     sequence: PointSequence,
-    duplicate_distance: float,
-    duplicate_angle: float,
+    max_duplicate_distance: float,
+    max_duplicate_angle: float,
 ) -> T.Tuple[PointSequence, T.List[types.ErrorMetadata]]:
     dedups: PointSequence = []
     dups: T.List[types.ErrorMetadata] = []
@@ -70,13 +70,14 @@ def duplication_check(
         else:
             angle_diff = None
 
-        if distance <= duplicate_distance and (
-            angle_diff is not None and angle_diff <= duplicate_angle
+        if distance <= max_duplicate_distance and (
+            angle_diff is None or angle_diff <= max_duplicate_angle
         ):
+            msg = f"Duplicate of its previous image in terms of distance <= {max_duplicate_distance} and angle <= {max_duplicate_angle}"
             dups.append(
                 types.describe_error_metadata(
                     MapillaryDuplicationError(
-                        f"Duplicate of its previous image in terms of distance <= {duplicate_distance} and angle <= {duplicate_angle}",
+                        msg,
                         types.as_desc(cur),
                         distance=distance,
                         angle_diff=angle_diff,
@@ -305,8 +306,8 @@ def process_sequence_properties(
         # duplication check
         dedups, dups = duplication_check(
             sequence,
-            duplicate_distance=duplicate_distance,
-            duplicate_angle=duplicate_angle,
+            max_duplicate_distance=duplicate_distance,
+            max_duplicate_angle=duplicate_angle,
         )
         assert len(sequence) == len(dedups) + len(dups)
         error_metadatas.extend(dups)
diff --git a/tests/unit/test_sequence_processing.py b/tests/unit/test_sequence_processing.py
index 79e35db70..401857b98 100644
--- a/tests/unit/test_sequence_processing.py
+++ b/tests/unit/test_sequence_processing.py
@@ -52,21 +52,30 @@ def test_find_sequences_by_folder(tmpdir: py.path.local):
             error=Exception("an error"),
         ),
         # s1
-        _make_image_metadata(Path(curdir) / Path("hello/foo.jpg"), 1.00001, 1.00001, 2),
+        _make_image_metadata(
+            Path(curdir) / Path("hello/foo.jpg"), 1.00001, 1.00001, 2, 11
+        ),
         _make_image_metadata(
             Path(curdir) / Path("./hello/bar.jpg"),
             1.00002,
             1.00002,
             8,
+            22,
+        ),
+        _make_image_metadata(
+            Path(curdir) / Path("hello/a.jpg"), 1.00002, 1.00002, 9, 33
         ),
-        _make_image_metadata(Path(curdir) / Path("hello/a.jpg"), 1.00002, 1.00002, 9),
         # s2
-        _make_image_metadata(Path(curdir) / Path("hello.jpg"), 1.00002, 1.00002, 2),
-        _make_image_metadata(Path(curdir) / Path("./foo.jpg"), 1.00001, 1.00001, 3),
-        _make_image_metadata(Path(curdir) / Path("a.jpg"), 1.00001, 1.00001, 1),
+        _make_image_metadata(Path(curdir) / Path("hello.jpg"), 1.00002, 1.00002, 2, 11),
+        _make_image_metadata(Path(curdir) / Path("./foo.jpg"), 1.00001, 1.00001, 3, 22),
+        _make_image_metadata(Path(curdir) / Path("a.jpg"), 1.00001, 1.00001, 1, 33),
         # s3
-        _make_image_metadata(Path(curdir) / Path("./../foo.jpg"), 1.00001, 1.00001, 19),
-        _make_image_metadata(Path(curdir) / Path("../bar.jpg"), 1.00002, 1.00002, 28),
+        _make_image_metadata(
+            Path(curdir) / Path("./../foo.jpg"), 1.00001, 1.00001, 19, 11
+        ),
+        _make_image_metadata(
+            Path(curdir) / Path("../bar.jpg"), 1.00002, 1.00002, 28, 22
+        ),
     ]
     metadatas = psp.process_sequence_properties(
         sequence,
@@ -277,11 +286,11 @@ def test_subsec_interpolation(tmpdir: py.path.local):
     curdir = tmpdir.mkdir("hello222").mkdir("world333")
     sequence: T.List[types.Metadata] = [
         # s1
-        _make_image_metadata(Path(curdir) / Path("./a.jpg"), 1, 1, 0.0),
-        _make_image_metadata(Path(curdir) / Path("./b.jpg"), 0, 1, 1.0),
-        _make_image_metadata(Path(curdir) / Path("./c.jpg"), 0, 0, 1.0),
-        _make_image_metadata(Path(curdir) / Path("./d.jpg"), 0, 0, 1.0),
-        _make_image_metadata(Path(curdir) / Path("./e.jpg"), 1, 0, 2.0),
+        _make_image_metadata(Path(curdir) / Path("./a.jpg"), 1, 1, 0.0, 1),
+        _make_image_metadata(Path(curdir) / Path("./b.jpg"), 0, 1, 1.0, 11),
+        _make_image_metadata(Path(curdir) / Path("./c.jpg"), 0, 0, 1.0, 22),
+        _make_image_metadata(Path(curdir) / Path("./d.jpg"), 0, 0, 1.0, 33),
+        _make_image_metadata(Path(curdir) / Path("./e.jpg"), 1, 0, 2.0, 44),
     ]
     metadatas = psp.process_sequence_properties(
         sequence,