diff --git a/map2loop/project.py b/map2loop/project.py
index 73b741ab..cf5840d1 100644
--- a/map2loop/project.py
+++ b/map2loop/project.py
@@ -247,6 +247,7 @@ def __init__(
         self.thickness_calculator = [InterpolatedStructure(
             dtm_data=self.map_data.get_map_data(Datatype.DTM),
             bounding_box=self.bounding_box,
+            is_strike=False
         )]
 
 
@@ -610,7 +611,7 @@ def calculate_stratigraphic_order(self, take_best=False):
 
     @beartype.beartype
     def set_thickness_calculator(
-        self, thickness_calculator: Union['ThicknessCalculator', List['ThicknessCalculator']]
+        self, thickness_calculator: Union['ThicknessCalculator', List['ThicknessCalculator']], is_strike: bool = False
     ) -> None:
         """
         Sets the thickness_calculator attribute for the object.
@@ -628,6 +629,7 @@ def set_thickness_calculator(
                     ThicknessCalculator or a list of such instances.
         """
         if isinstance(thickness_calculator, ThicknessCalculator):
+            thickness_calculator.is_strike = is_strike
             thickness_calculator = [thickness_calculator]
 
         # Now check if thickness_calculator is a list of valid instances
@@ -639,6 +641,8 @@ def set_thickness_calculator(
             )
 
         # Finally, set the calculators
+        for tc in thickness_calculator:
+            tc.is_strike = is_strike
         self.thickness_calculator = thickness_calculator
 
     def get_thickness_calculator(self) -> List[str]:
diff --git a/map2loop/thickness_calculator.py b/map2loop/thickness_calculator.py
index 2f5da940..13a1b806 100644
--- a/map2loop/thickness_calculator.py
+++ b/map2loop/thickness_calculator.py
@@ -39,7 +39,8 @@ def __init__(
         self, 
         dtm_data: Optional[gdal.Dataset] = None, 
         bounding_box: Optional[dict] = None, 
-        max_line_length: Optional[float] = None
+        max_line_length: Optional[float] = None,
+        is_strike: Optional[bool] = False,
         ):
         """
         Initialiser of for ThicknessCalculator
@@ -48,6 +49,7 @@ def __init__(
         self.max_line_length = max_line_length
         self.dtm_data = dtm_data
         self.bounding_box = bounding_box
+        self.is_strike = is_strike
 
     def type(self):
         """
@@ -221,12 +223,13 @@ def __init__(
         self, 
         dtm_data: Optional[gdal.Dataset] = None, 
         bounding_box: Optional[dict] = None, 
-        max_line_length: Optional[float] = None
+        max_line_length: Optional[float] = None,
+        is_strike: Optional[bool] = False
         ):
         """
         Initialiser for interpolated structure version of the thickness calculator
         """
-        super().__init__(dtm_data, bounding_box, max_line_length)
+        super().__init__(dtm_data, bounding_box, max_line_length, is_strike)
         self.thickness_calculator_label = "InterpolatedStructure"
         self.lines = None
         
@@ -475,13 +478,14 @@ def __init__(
         self, 
         dtm_data: Optional[gdal.Dataset] = None, 
         bounding_box: Optional[dict] = None, 
-        max_line_length: Optional[float] = None
+        max_line_length: Optional[float] = None,
+        is_strike: Optional[bool] = False
         ):
-        super().__init__(dtm_data, bounding_box, max_line_length)
+        super().__init__(dtm_data, bounding_box, max_line_length, is_strike)
         self.thickness_calculator_label = "StructuralPoint"
         self.strike_allowance = 30
         self.lines = None
-        
+
 
     @beartype.beartype
     def compute(
@@ -575,7 +579,10 @@ def compute(
 
             # find unit and strike
             litho_in = measurement['unit_name']
-            strike = (measurement['DIPDIR'] - 90) % 360
+            if self.is_strike:
+                strike = measurement['DIPDIR']
+            else:
+                strike = (measurement['DIPDIR'] - 90) % 360
 
             # find bounding box of the lithology
             bbox_poly = geology[geology['UNITNAME'] == litho_in][['minx', 'miny', 'maxx', 'maxy']]
diff --git a/tests/thickness/InterpolatedStructure/test_interpolated_structure.py b/tests/thickness/InterpolatedStructure/test_interpolated_structure.py
index 12d0c87c..164ce2f7 100644
--- a/tests/thickness/InterpolatedStructure/test_interpolated_structure.py
+++ b/tests/thickness/InterpolatedStructure/test_interpolated_structure.py
@@ -1683,7 +1683,8 @@ def test_calculate_thickness_InterpolatedStructure():
         "top": 3000,
     }
     thickness_calculator = InterpolatedStructure(dtm_data=md.get_map_data(Datatype.DTM),
-                                                 bounding_box=md.bounding_box)
+                                                 bounding_box=md.bounding_box,
+                                                 is_strike=False)
 
     result = thickness_calculator.compute(
         units=st_units,
diff --git a/tests/thickness/StructurePoint/test_ThicknessStructuralPoint.py b/tests/thickness/StructurePoint/test_ThicknessStructuralPoint.py
index f528b0ee..74c7851d 100644
--- a/tests/thickness/StructurePoint/test_ThicknessStructuralPoint.py
+++ b/tests/thickness/StructurePoint/test_ThicknessStructuralPoint.py
@@ -1660,7 +1660,7 @@ def check_thickness_values(result, column, description):
 
 def test_calculate_thickness_structural_point():
     # Run the calculation
-    thickness_calculator = StructuralPoint()
+    thickness_calculator = StructuralPoint(is_strike=False)
 
     md = MapData()
     md.sampled_contacts = s_c