diff --git a/MapControl/Shared/MapPanel.cs b/MapControl/Shared/MapPanel.cs
index 6ed791d1..b9387c1f 100644
--- a/MapControl/Shared/MapPanel.cs
+++ b/MapControl/Shared/MapPanel.cs
@@ -306,7 +306,9 @@ namespace MapControl
                 element.Height = viewRect.Height;
                 element.Arrange(viewRect);
 
-                rotation += parentMap.ViewTransform.Rotation;
+                // LatLonBoxToMap rotation is counterclockwise, RotateTransform is clockwise.
+                //
+                rotation = (parentMap.ViewTransform.Rotation - rotation) % 360d;
 
                 if (element.RenderTransform is RotateTransform rotateTransform)
                 {
diff --git a/MapControl/Shared/MapProjection.cs b/MapControl/Shared/MapProjection.cs
index 6fac8b40..d21a6abd 100644
--- a/MapControl/Shared/MapProjection.cs
+++ b/MapControl/Shared/MapProjection.cs
@@ -193,11 +193,11 @@ namespace MapControl
                 // Additional rotation caused by the projection, calculated as mean value
                 // of the two angles measured relative to the east and north axis.
                 //
-                var r1 = (Math.Atan2(dy1, dx1) * 180d / Math.PI + 180d) % 360d - 180d;
-                var r2 = (Math.Atan2(-dx2, dy2) * 180d / Math.PI + 180d) % 360d - 180d;
+                var r1 = Math.Atan2(dy1, dx1) * 180d / Math.PI;
+                var r2 = Math.Atan2(-dx2, dy2) * 180d / Math.PI;
 
                 rect = new Rect(x, y, width, height);
-                rotation = latLonBox.Rotation + (r1 + r2) / 2d;
+                rotation = latLonBox.Rotation + (r1 + r2) / 2d % 360d;
             }
 
             return (rect, rotation);