diff --git a/Config.cs b/Config.cs
new file mode 100644
index 0000000..f5166de
--- /dev/null
+++ b/Config.cs
@@ -0,0 +1,69 @@
+using Newtonsoft.Json;
+using System.IO;
+using System.Runtime.Serialization;
+
+namespace RiverTrace
+{
+    [DataContract]
+    class ConfigData
+    {
+        [DataMember]
+        public int zoom;
+
+        [DataMember]
+        public double lat1;
+        [DataMember]
+        public double lon1;
+        [DataMember]
+        public double lat2;
+        [DataMember]
+        public double lon2;
+
+        [DataMember]
+        public int iterationCount;
+        [DataMember]
+        public double sampleWidthScale;
+        [DataMember]
+        public double sampleLengthScale;
+        [DataMember]
+        public double shoreContrast;
+        [DataMember]
+        public double maxDifference;
+
+        [DataMember]
+        public bool debug;
+    }
+
+    class Config
+    {
+        public static ConfigData Data;
+        private static string fileName;
+
+        static Config()
+        {
+            fileName = "config.json";
+            Data = new ConfigData
+            {
+                zoom = 15,
+                lat1 = 64.9035637,
+                lon1 = 52.2209239,
+                lat2 = 64.9032122,
+                lon2 = 52.2213061,
+                iterationCount = 1000,
+                sampleWidthScale = 1.7,
+                sampleLengthScale = 0.7,
+                shoreContrast = 10.0,
+                maxDifference = 28.0,
+                debug = false
+            };
+            if (File.Exists(fileName))
+                Data = JsonConvert.DeserializeObject<ConfigData>(File.ReadAllText(fileName));
+        }
+
+        public static void Write()
+        {
+            File.WriteAllText(fileName,
+                JsonConvert.SerializeObject(Data, Formatting.Indented));
+        }
+    }
+}
diff --git a/FodyWeavers.xml b/FodyWeavers.xml
new file mode 100644
index 0000000..2e6d4a7
--- /dev/null
+++ b/FodyWeavers.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Weavers>
+	<Costura/>
+  
+</Weavers>
\ No newline at end of file
diff --git a/Program.cs b/Program.cs
index e07e4da..751bdfc 100644
--- a/Program.cs
+++ b/Program.cs
@@ -8,17 +8,14 @@
 using System.Reflection;
 using System.Threading;
 using System.Threading.Tasks;
-using System.Windows.Media.Imaging;
 
 namespace RiverTrace
 {
     class Program
     {
-        private const bool debug = true;
         private Cie1976Comparison cie;
         private int sampleWidth;
         private int sampleLength;
-        private double maxDifference;
         private TileMap tileMap;
 
         Program()
@@ -26,18 +23,9 @@ class Program
             string exeDir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
             Directory.SetCurrentDirectory(exeDir);
 
-            /*Trace(
-                64.9035637, 52.2209239,
-                64.9032122, 52.2213061,
-                15);*/
-            /*Trace(
-                62.85685, 83.55849,
-                62.85723, 83.55906,
-                15);*/
-            Trace(
-                65.5238753, 79.3499377,
-                65.5239887, 79.3501845,
-                16);
+            Config.Write();
+
+            Trace();
         }
 
         void WriteOsm(List<Vector> result, int zoom)
@@ -82,8 +70,6 @@ double GetColorDifference(Color c1, Color c2)
 
         void CalcSampleDimensions(Vector startPoint, Vector direction)
         {
-            double shoreContrast = 10.0;
-
             int pickCount = 5;
             Vector pickPoint1 = startPoint;
             double[] riverHalfWidth = new double[2];
@@ -99,7 +85,7 @@ void CalcSampleDimensions(Vector startPoint, Vector direction)
                         pickPoint2 += sideDirs[j];
                         Color checkColor = tileMap.GetPixel(pickPoint2.X, pickPoint2.Y);
                         double diff = GetColorDifference(refColor, checkColor);
-                        if (diff > shoreContrast)
+                        if (diff > Config.Data.shoreContrast)
                             break;
                         riverHalfWidth[j] += 1.0;
                     }
@@ -109,8 +95,8 @@ void CalcSampleDimensions(Vector startPoint, Vector direction)
             riverHalfWidth[0] /= pickCount;
             riverHalfWidth[1] /= pickCount;
             double riverWidth = riverHalfWidth[0] + riverHalfWidth[1] + 1.0;
-            sampleWidth = Math.Max((int)Math.Ceiling(riverWidth * 1.7), 5);
-            sampleLength = Math.Max((int)Math.Ceiling(riverWidth * 2.0), 3);
+            sampleWidth = Math.Max((int)Math.Ceiling(riverWidth * Config.Data.sampleWidthScale), 5);
+            sampleLength = Math.Max((int)Math.Ceiling(riverWidth * Config.Data.sampleLengthScale), 3);
         }
 
         SimpleBitmap GetSample(Vector origin, Vector direction)
@@ -195,20 +181,20 @@ SimpleBitmap GetAvgSample(SimpleBitmap s1, SimpleBitmap s2)
             return sample;
         }
 
-        void Trace(double lat1, double lon1, double lat2, double lon2, int zoom)
+        void Trace()
         {
             Stopwatch sw = new Stopwatch();
             sw.Start();
 
             cie = new Cie1976Comparison();
-            tileMap = new TileMap(zoom);
+            tileMap = new TileMap(Config.Data.zoom);
 
             var way = new List<Vector>();
 
             Vector p1 = new Vector();
             Vector p2 = new Vector();
-            Projection.DegToPix(lat1, lon1, zoom, out p1.X, out p1.Y);
-            Projection.DegToPix(lat2, lon2, zoom, out p2.X, out p2.Y);
+            Projection.DegToPix(Config.Data.lat1, Config.Data.lon1, Config.Data.zoom, out p1.X, out p1.Y);
+            Projection.DegToPix(Config.Data.lat2, Config.Data.lon2, Config.Data.zoom, out p2.X, out p2.Y);
 
             way.Add(p1);
             Vector lastDirection = p2 - p1;
@@ -216,8 +202,6 @@ void Trace(double lat1, double lon1, double lat2, double lon2, int zoom)
 
             CalcSampleDimensions(p1, lastDirection);
 
-            maxDifference = 28.0;
-
             List<SimpleBitmap> samples = new List<SimpleBitmap>();
             SimpleBitmap firstSample = GetSample(p1, lastDirection);
             SimpleBitmap avgSample = firstSample;
@@ -226,9 +210,7 @@ void Trace(double lat1, double lon1, double lat2, double lon2, int zoom)
             samples.Add(firstSample);
 
             double totalDiff = 0.0;
-            int iterationCount = 1710;
-
-            for (int i = 0; i < iterationCount; i++)
+            for (int i = 0; i < Config.Data.iterationCount; i++)
             {
                 SimpleBitmap bestSample;
                 double bestDiff;
@@ -239,7 +221,7 @@ void Trace(double lat1, double lon1, double lat2, double lon2, int zoom)
                 GetBestAngle(lastPoint, lastDirection, avgSample, bestAngle - 4.0, bestAngle + 4.0, 1.0,
                     out bestSample, out bestDiff, out bestVector, out bestAngle);
 
-                if (bestDiff > maxDifference)
+                if (bestDiff > Config.Data.maxDifference)
                     break;
 
                 totalDiff += bestDiff;
@@ -254,9 +236,9 @@ void Trace(double lat1, double lon1, double lat2, double lon2, int zoom)
             sw.Stop();
 
             way.Reverse();
-            WriteOsm(way, zoom);
+            WriteOsm(way, Config.Data.zoom);
 
-            if (debug)
+            if (Config.Data.debug)
             {
                 SimpleBitmap sampleChain = new SimpleBitmap(
                     sampleWidth, sampleLength * samples.Count);
diff --git a/RiverTrace.csproj b/RiverTrace.csproj
index 6e8ca69..01e7ada 100644
--- a/RiverTrace.csproj
+++ b/RiverTrace.csproj
@@ -11,6 +11,7 @@
     <AssemblyName>RiverTrace</AssemblyName>
     <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
+    <NuGetPackageImportStamp>18af9fa7</NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -36,9 +37,14 @@
       <HintPath>packages\ColorMine.1.1.3.0\lib\ColorMine.dll</HintPath>
       <Private>True</Private>
     </Reference>
+    <Reference Include="Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>packages\Newtonsoft.Json.9.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+      <Private>True</Private>
+    </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Runtime.Serialization" />
     <Reference Include="System.Xaml" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
@@ -50,6 +56,7 @@
   <ItemGroup>
     <Compile Include="Bing.cs" />
     <Compile Include="Color.cs" />
+    <Compile Include="Config.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Projection.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
@@ -61,7 +68,17 @@
     <None Include="App.config" />
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="FodyWeavers.xml" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="packages\Fody.1.28.3\build\Fody.targets" Condition="Exists('packages\Fody.1.28.3\build\Fody.targets')" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Enable NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('packages\Fody.1.28.3\build\Fody.targets')" Text="$([System.String]::Format('$(ErrorText)', 'packages\Fody.1.28.3\build\Fody.targets'))" />
+  </Target>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
   <Target Name="BeforeBuild">
diff --git a/packages.config b/packages.config
index 594e64b..0935b1f 100644
--- a/packages.config
+++ b/packages.config
@@ -1,4 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="ColorMine" version="1.1.3.0" targetFramework="net45" />
+  <package id="Costura.Fody" version="1.3.3.0" targetFramework="net45" developmentDependency="true" />
+  <package id="Fody" version="1.28.3" targetFramework="net45" developmentDependency="true" />
+  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
 </packages>
\ No newline at end of file