Height to Elevation changed; ISrtmData used;

Alpinechough.Srtm.csproj

@@ -3,13 +3,13 @@
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProductVersion>9.0.21022</ProductVersion>
+    <ProductVersion>8.0.30703</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
     <ProjectGuid>{CD10A6E7-745F-4C82-9AAB-C5AA90944195}</ProjectGuid>
     <OutputType>Library</OutputType>
     <RootNamespace>Alpinechough.Srtm</RootNamespace>
     <AssemblyName>Alpinechough.Srtm</AssemblyName>
-    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>

ISrtmData.cs

@@ -36,18 +36,18 @@ public interface ISrtmData
 		void Unload ();
 
 		/// <summary>
-		/// Gets the height.
+		/// Gets the elevation.
 		/// </summary>
 		/// <returns>
-		/// The height. Null, if height is not available.
+		/// The height. Null, if elevation is not available.
 		/// </returns>
 		/// <param name='coordinates'>
 		/// Coordinates.
 		/// </param>
 		/// <exception cref='Exception'>
 		/// Represents errors that occur during application execution.
 		/// </exception>
-		int? GetHeight (IGeographicalCoordinates coordinates);
+		int? GetElevation (IGeographicalCoordinates coordinates);
 	}
 }
 

SrtmData.cs

@@ -34,7 +34,7 @@ namespace Alpinechough.Srtm
 	/// <exception cref='DirectoryNotFoundException'>
 	/// Is thrown when part of a file or directory argument cannot be found.
 	/// </exception>
-	public class SrtmData
+	public class SrtmData : ISrtmData
 	{
 		#region Lifecycle
 
@@ -89,18 +89,18 @@ public void Unload ()
 		}
 
 		/// <summary>
-		/// Gets the height.
+		/// Gets the elevation.
 		/// </summary>
 		/// <returns>
-		/// The height. Null, if height is not available.
+		/// The height. Null, if elevation is not available.
 		/// </returns>
 		/// <param name='coordinates'>
 		/// Coordinates.
 		/// </param>
 		/// <exception cref='Exception'>
 		/// Represents errors that occur during application execution.
 		/// </exception>
-		public int? GetHeight (IGeographicalCoordinates coordinates)
+		public int? GetElevation (IGeographicalCoordinates coordinates)
 		{
 			int cellLatitude = (int)Math.Floor (Math.Abs (coordinates.Latitude));
 			if (coordinates.Latitude < 0)
@@ -118,7 +118,7 @@ public void Unload ()
 
 			SrtmDataCell dataCell = DataCells.Where (dc => dc.Latitude == cellLatitude && dc.Longitude == cellLongitude).FirstOrDefault ();
 			if (dataCell != null)
-				return dataCell.GetHeight (coordinates);
+				return dataCell.GetElevation (coordinates);
 
 			string filename = string.Format ("{0}{1:D2}{2}{3:D3}.hgt",
 				cellLatitude < 0 ? "S" : "N",
@@ -133,7 +133,7 @@ public void Unload ()
 
 			dataCell = new SrtmDataCell (filePath);
 			DataCells.Add (dataCell);
-			return dataCell.GetHeight (coordinates);
+			return dataCell.GetElevation (coordinates);
 		}
 
 		#endregion

SrtmDataCell.cs

@@ -133,19 +133,18 @@ public SrtmDataCell (string filepath)
 		#region Public Methods
 
 		/// <summary>
-		/// Gets the height.
+		/// Gets the elevation.
 		/// </summary>
 		/// <returns>
-		/// The height.
+		/// The height. Null, if elevation is not available.
 		/// </returns>
 		/// <param name='coordinates'>
 		/// Coordinates.
 		/// </param>
-		/// <exception cref='ArgumentOutOfRangeException'>
-		/// Is thrown when an argument passed to a method is invalid because it is outside the allowable range of values as
-		/// specified by the method.
+		/// <exception cref='Exception'>
+		/// Represents errors that occur during application execution.
 		/// </exception>
-		public int? GetHeight (IGeographicalCoordinates coordinates)
+		public int? GetElevation (IGeographicalCoordinates coordinates)
 		{
 			int localLat = (int)((coordinates.Latitude - Latitude) * PointsPerCell);
 			int localLon = (int)(((coordinates.Longitude - Longitude)) * PointsPerCell);