diff --git a/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs b/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs
index 1c90e8d8..dc54f49d 100644
--- a/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs
+++ b/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs
@@ -41,7 +41,7 @@ namespace AsbCloudInfrastructure.Services
                 { 
                     X = x,
                     Y = y,
-                    Z = z * -1
+                    Z = z
                 };
 
                 result.Add(coordinates);
@@ -60,6 +60,6 @@ namespace AsbCloudInfrastructure.Services
             prev + flat * Math.Cos(azimuth * Math.PI / 180);
 
         private double GetZ(double depthEnd, double depthStart, double zenit, double prev) =>
-            prev - (depthEnd - depthStart) * Math.Cos(zenit * Math.PI / 180);
+            prev + (depthEnd - depthStart) * Math.Cos(zenit * Math.PI / 180);
     }
 }