diff --git a/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs b/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs
index ee40b693..dc54f49d 100644
--- a/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs
+++ b/AsbCloudInfrastructure/Services/TrajectoryVisualizationService.cs
@@ -20,18 +20,21 @@ namespace AsbCloudInfrastructure.Services
 
         public async Task<IEnumerable<TrajectoryVisualizationDto>> GetTrajectoryAsync(int idWell, CancellationToken token)
         {
-            var result = new List<TrajectoryVisualizationDto>();
+            var result = new List<TrajectoryVisualizationDto> {
+                new ()
+            };
             var dtos = (await repository.GetAsync(idWell, token)).ToArray();
 
             var prevData = dtos[0];
             var prevCoordinates = new TrajectoryVisualizationDto();
+
             for (var i = 1; i < dtos.Length; i++)
             { 
                 var data = dtos[i];
                 var flat = GetFlat(data.WellboreDepth, prevData.WellboreDepth, prevData.ZenithAngle);
-                var x = prevCoordinates.X = GetX(data.AzimuthGeo, flat, prevCoordinates.X);
-                var y = prevCoordinates.Y = GetY(data.AzimuthGeo, flat, prevCoordinates.X);
-                var z = prevCoordinates.Z = GetZ(data.WellboreDepth, prevData.WellboreDepth, data.ZenithAngle, prevCoordinates.Z);
+                var x = prevCoordinates.X = GetX(prevData.AzimuthGeo, flat, prevCoordinates.X);
+                var y = prevCoordinates.Y = GetY(prevData.AzimuthGeo, flat, prevCoordinates.X);
+                var z = prevCoordinates.Z = GetZ(data.WellboreDepth, prevData.WellboreDepth, prevData.ZenithAngle, prevCoordinates.Z);
                 prevData = data;
 
                 var coordinates = new TrajectoryVisualizationDto
@@ -47,7 +50,7 @@ namespace AsbCloudInfrastructure.Services
             return result;
         }
 
-        private double GetFlat(double depthEnd, double depthStart, double zenit) => 
+        private double GetFlat(double depthEnd, double depthStart, double zenit) =>
             (depthEnd - depthStart) * Math.Sin(zenit * Math.PI / 180);
 
         private double GetX(double azimuth, double flat, double prev) =>
@@ -57,6 +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);
     }
 }