diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/ScanDataController.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/ScanDataController.cs
index e4e4a49..e6be899 100644
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/ScanDataController.cs
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/ScanDataController.cs
@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Mvc;
 using PointCloudWeb.Server.Models;
 using PointCloudWeb.Server.Services;
+using System;
 
 namespace PointCloudWeb.Server.Controllers
 {
@@ -8,17 +9,23 @@ namespace PointCloudWeb.Server.Controllers
     [Route("[controller]")]
     public class DataController : ControllerBase
     {
-        private readonly DataService _scanDataService;
+        private readonly DataService scanDataService;
 
         public DataController(DataService scanDataService)
         {
-            _scanDataService = scanDataService;
+            this.scanDataService = scanDataService;
         }
 
         [HttpPost]
         public void PostScanData([FromBody] ScanDataList data)
         {
-            _scanDataService.AddScan(data);
+            scanDataService.AddScan(data);
+        }
+
+        [HttpPut]
+        public void ScanFinished(Guid id)
+        {
+            scanDataService.ScanFinished(id);
         }
     }
 }
\ No newline at end of file
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/WeatherForecastController.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/WeatherForecastController.cs
index 2f9067c..8685dd1 100644
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/WeatherForecastController.cs
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Controllers/WeatherForecastController.cs
@@ -16,11 +16,11 @@ namespace PointCloudWeb.Server.Controllers
             "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
         };
 
-        private readonly ILogger<WeatherForecastController> _logger;
+        private readonly ILogger<WeatherForecastController> logger;
 
         public WeatherForecastController(ILogger<WeatherForecastController> logger)
         {
-            _logger = logger;
+            this.logger = logger;
         }
 
         [HttpGet]
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Models/PointCloud.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Models/PointCloud.cs
index c2e1e3b..f2b00d3 100644
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Models/PointCloud.cs
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Models/PointCloud.cs
@@ -1,6 +1,10 @@
+using PointCloudWeb.Server.Utils;
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
 using System.Linq;
+using System.Numerics;
 
 namespace PointCloudWeb.Server.Models
 {
@@ -34,21 +38,71 @@ namespace PointCloudWeb.Server.Models
 
         public override int GetHashCode() => HashCode.Combine(X, Y, Z);
 
-        public override string ToString() => (X.ToString() + "  " + Y.ToString() + "  " + Z.ToString());
+        public override string ToString() => X.ToString() + "  " + Y.ToString() + "  " + Z.ToString();
     }
 
     public class PointCloud
     {
-        public PointCloud(String name, Guid id)
+        private ObservableCollection<Point> points;
+        private Matrix4x4 transformation;
+
+        public PointCloud(string name, Guid id)
         {
-            Points = new List<Point>();
+            points = new ObservableCollection<Point>();
+            points.CollectionChanged += PointsCollectionChanged;
+            TransformedPoints = new List<Point>();
             Id = id;
             Name = name;
         }
 
         public Guid Id { get; private set; }
+
         public string Name { get; set; }
-        public IList<Point> Points { get; private set; }
+
+        public IList<Point> Points { get => points; }
+
+        public Matrix4x4 Transformation
+        {
+            get => transformation;
+            set
+            {
+                TransformationChanged();
+                transformation = value;
+            }
+        }
+
+        public IList<Point> TransformedPoints { get; private set; }
+
+        private Point GetTransformedPoint(Point point)
+        {
+            if (Transformation.IsIdentity)
+                return new Point(point.X, point.Y, point.Z);
+
+            var v = new Vector3(point.X, point.Y, point.Z);
+            v = Vector3.Transform(v, Transformation);
+
+            return new Point(NumericUtils.Round(v.X), NumericUtils.Round(v.Y), NumericUtils.Round(v.Z));
+        }
+
+        private void PointsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
+        {
+            if (TransformedPoints.Count > 0)
+                TransformationChanged();
+        }
+
+        public void TransformationChanged()
+        {
+            TransformedPoints.Clear();
+
+            if (Transformation.IsIdentity)
+                return;
+
+            foreach (var point in Points)
+            {
+                var transformedPoint = GetTransformedPoint(point);
+                TransformedPoints.Add(transformedPoint);
+            }
+        }
     }
 
     public class PointCloudCollection : List<PointCloud>
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Services/IPointCloudRegistration.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Services/IPointCloudRegistration.cs
deleted file mode 100644
index d64af5e..0000000
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Services/IPointCloudRegistration.cs
+++ /dev/null
@@ -1,14 +0,0 @@
-using PointCloudWeb.Server.Models;
-
-namespace PointCloudWeb.Server.Services
-{
-    public interface IPointCloudRegistation
-    {
-        public TransformationMatrix RegisterPointCloud(PointCloud pc1, PointCloud pc2)
-        {
-            return null;
-        }
-
-        class TransformationMatrix { }
-    }
-}
\ No newline at end of file
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Services/IPointCloudRegistrationService.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Services/IPointCloudRegistrationService.cs
new file mode 100644
index 0000000..609e9d9
--- /dev/null
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Services/IPointCloudRegistrationService.cs
@@ -0,0 +1,10 @@
+using PointCloudWeb.Server.Models;
+using System.Numerics;
+
+namespace PointCloudWeb.Server.Services
+{
+    public interface IPointCloudRegistationService
+    {
+        public Matrix4x4 RegisterPointCloud(PointCloud source, PointCloud target);
+    }
+}
\ No newline at end of file
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Services/PointCloudService.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Services/PointCloudService.cs
index b89c5fa..80ac7a7 100644
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Services/PointCloudService.cs
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Services/PointCloudService.cs
@@ -6,16 +6,18 @@ namespace PointCloudWeb.Server.Services
 {
     public class PointCloudService
     {
-        private readonly PointCloudCollection _pointClouds;
+        private readonly IPointCloudRegistationService pointCloudRegistation;
+        private readonly PointCloudCollection pointClouds;
 
-        public PointCloudService()
+        public PointCloudService(IPointCloudRegistationService pointCloudRegistation)
         {
-            _pointClouds = new PointCloudCollection();
+            pointClouds = new PointCloudCollection();
+            this.pointCloudRegistation = pointCloudRegistation;
         }
 
         private void RaiseIfNotExists(Guid id)
         {
-            if (!_pointClouds.Contains(id))
+            if (!pointClouds.Contains(id))
                 throw new ArgumentOutOfRangeException("The Id {0} was not found!", id.ToString());
         }
 
@@ -23,7 +25,7 @@ namespace PointCloudWeb.Server.Services
         {
             RaiseIfNotExists(id);
 
-            var pc = _pointClouds.GetById(id);
+            var pc = pointClouds.GetById(id);
 
             foreach (var point in points)
                 pc.Points.Add(point);
@@ -31,16 +33,21 @@ namespace PointCloudWeb.Server.Services
 
         public void RegisterPointCloud(Guid id)
         {
-            RegisterPointClouds(new List<Guid>() { id });
+            RaiseIfNotExists(id);
+            var pointCloud = pointClouds.GetById(id);
+
+            //the first can't be registered
+            if (pointClouds.IndexOf(pointCloud) == 0)
+                return;
+
+            var transformation = pointCloudRegistation.RegisterPointCloud(pointCloud, pointClouds[0]);
+            pointCloud.Transformation = transformation;
         }
 
-        public void RegisterPointClouds(IList<Guid> ids)
+        public void RegisterPointClouds()
         {
-            //ensure that every element in "ids" is in "_pointClouds"
-            foreach (var id in ids)
-                RaiseIfNotExists(id);
-
-            throw new NotImplementedException();
+            foreach (var pointCloud in pointClouds)
+                RegisterPointCloud(pointCloud.Id);
         }
     }
 }
\ No newline at end of file
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanConverterService.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanConverterService.cs
index dc11998..1045fd6 100644
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanConverterService.cs
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanConverterService.cs
@@ -1,13 +1,11 @@
 using System;
-using System.Numerics;
 using PointCloudWeb.Server.Models;
+using PointCloudWeb.Server.Utils;
 
 namespace PointCloudWeb.Server.Services
 {
     public class ScanConverterService
     {
-        private int Round(double value) => (int)Math.Round(double.IsNaN(value) ? 0 : value, 0, MidpointRounding.AwayFromZero);
-
         public Point Transform(ScanDataPoint scan)
         {
             var factorZ = 1;
@@ -46,9 +44,9 @@ namespace PointCloudWeb.Server.Services
 
             var p = new Point()
             {
-                X = Round(z * sinYB / sinYA),
-                Y = Round(z * sinXB / sinXA),
-                Z = factorZ * Round(z)
+                X = NumericUtils.Round(z * sinYB / sinYA),
+                Y = NumericUtils.Round(z * sinXB / sinXA),
+                Z = factorZ * NumericUtils.Round(z)
             };
 
             return p;
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanDataService.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanDataService.cs
index a8eae49..4a2fbf2 100644
--- a/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanDataService.cs
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Services/ScanDataService.cs
@@ -6,13 +6,13 @@ namespace PointCloudWeb.Server.Services
 {
     public class DataService
     {
-        private readonly PointCloudService _pointCloudService;
-        private readonly ScanConverterService _scanConverterService;
+        private readonly PointCloudService pointCloudService;
+        private readonly ScanConverterService scanConverterService;
 
         public DataService(PointCloudService pointCloudService, ScanConverterService scanConverterService)
         {
-            _pointCloudService = pointCloudService;
-            _scanConverterService = scanConverterService;
+            this.pointCloudService = pointCloudService;
+            this.scanConverterService = scanConverterService;
         }
 
         private IList<Point> ConvertToPoints(ScanDataList scanData)
@@ -21,7 +21,7 @@ namespace PointCloudWeb.Server.Services
 
             foreach (var scan in scanData.ScanPoints)
             {
-                list.Add(_scanConverterService.Transform(scan));
+                list.Add(scanConverterService.Transform(scan));
             }
 
             return list;
@@ -29,7 +29,12 @@ namespace PointCloudWeb.Server.Services
 
         public void AddScan(ScanDataList scanData)
         {
-            _pointCloudService.AddPoints(scanData.Id, ConvertToPoints(scanData));
+            pointCloudService.AddPoints(scanData.Id, ConvertToPoints(scanData));
+        }
+
+        public void ScanFinished(Guid id)
+        {
+            pointCloudService.RegisterPointCloud(id);
         }
     }
 }
\ No newline at end of file
diff --git a/PointCloudWeb.Server/PointCloudWeb.Server/Utils/NumericUtils.cs b/PointCloudWeb.Server/PointCloudWeb.Server/Utils/NumericUtils.cs
new file mode 100644
index 0000000..2d97c68
--- /dev/null
+++ b/PointCloudWeb.Server/PointCloudWeb.Server/Utils/NumericUtils.cs
@@ -0,0 +1,9 @@
+using System;
+
+namespace PointCloudWeb.Server.Utils
+{
+    public static class NumericUtils
+    {
+        public static int Round(double value) => (int)Math.Round(double.IsNaN(value) ? 0 : value, 0, MidpointRounding.AwayFromZero);
+    }
+}
\ No newline at end of file