diff --git a/src/Triangle/Geometry/RegionPointer.cs b/src/Triangle/Geometry/RegionPointer.cs
index 6eb93b3..7ecb6ad 100644
--- a/src/Triangle/Geometry/RegionPointer.cs
+++ b/src/Triangle/Geometry/RegionPointer.cs
@@ -6,42 +6,35 @@
 
 namespace TriangleNet.Geometry
 {
-    using System;
-
     /// <summary>
     /// Pointer to a region in the mesh geometry. A region is a well-defined
     /// subset of the geometry (enclosed by subsegments).
     /// </summary>
     public class RegionPointer
     {
-        internal Point point;
-        internal int id;
-        internal double area;
+        /// <summary>
+        /// Gets the x and y coordinates of the region pointer.
+        /// </summary>
+        public Point Point { get; private set; }
 
         /// <summary>
-        /// Gets or sets a region area constraint.
+        /// Gets the label of the region.
         /// </summary>
-        public double Area
-        {
-            get { return area; }
-            set
-            {
-                if (value < 0.0)
-                {
-                    throw new ArgumentException("Area constraints must not be negative.");
-                }
-                area = value;
-            }
-        }
+        public int Label { get; private set; }
+
+        /// <summary>
+        /// Gets the area constraint of the region.
+        /// </summary>
+        public double Area { get; private set; }
 
         /// <summary>
         /// Initializes a new instance of the <see cref="RegionPointer" /> class.
         /// </summary>
         /// <param name="x">X coordinate of the region.</param>
         /// <param name="y">Y coordinate of the region.</param>
-        /// <param name="id">Region id.</param>
-        public RegionPointer(double x, double y, int id)
-            : this(x, y, id, 0.0)
+        /// <param name="label">Region label.</param>
+        public RegionPointer(double x, double y, int label)
+            : this(x, y, label, 0.0)
         {
         }
 
@@ -50,13 +43,13 @@ public RegionPointer(double x, double y, int id)
         /// </summary>
         /// <param name="x">X coordinate of the region.</param>
         /// <param name="y">Y coordinate of the region.</param>
-        /// <param name="id">Region id.</param>
+        /// <param name="label">Region label.</param>
         /// <param name="area">Area constraint.</param>
-        public RegionPointer(double x, double y, int id, double area)
+        public RegionPointer(double x, double y, int label, double area)
         {
-            this.point = new Point(x, y);
-            this.id = id;
-            this.area = area;
+            Point = new Point(x, y);
+            Label = label;
+            Area = area;
         }
     }
 }
diff --git a/src/Triangle/IO/TriangleWriter.cs b/src/Triangle/IO/TriangleWriter.cs
index 7a2168d..695eba9 100644
--- a/src/Triangle/IO/TriangleWriter.cs
+++ b/src/Triangle/IO/TriangleWriter.cs
@@ -237,8 +237,8 @@ public void WritePoly(IPolygon polygon, string filename)
                 writer.WriteLine("{0}", polygon.Regions.Count);
                 foreach (var region in polygon.Regions)
                 {
-                    writer.WriteLine("{0} {1} {2} {3}", j, region.point.X.ToString(nfi),
-                        region.point.Y.ToString(nfi), region.id);
+                    writer.WriteLine("{0} {1} {2} {3}", j, region.Point.X.ToString(nfi),
+                        region.Point.Y.ToString(nfi), region.Label);
 
                     j++;
                 }
@@ -328,8 +328,8 @@ public void WritePoly(Mesh mesh, string filename, bool writeNodes)
                 writer.WriteLine("{0}", mesh.regions.Count);
                 foreach (var region in mesh.regions)
                 {
-                    writer.WriteLine("{0} {1} {2} {3}", j, region.point.X.ToString(nfi),
-                        region.point.Y.ToString(nfi), region.id);
+                    writer.WriteLine("{0} {1} {2} {3}", j, region.Point.X.ToString(nfi),
+                        region.Point.Y.ToString(nfi), region.Label);
 
                     j++;
                 }
diff --git a/src/Triangle/Meshing/ConstraintMesher.cs b/src/Triangle/Meshing/ConstraintMesher.cs
index 51e28b3..2073a1c 100644
--- a/src/Triangle/Meshing/ConstraintMesher.cs
+++ b/src/Triangle/Meshing/ConstraintMesher.cs
@@ -162,7 +162,7 @@ private void CarveHoles()
                 {
                     regionTris[i] = dummytri;
                     // Ignore region points that aren't within the bounds of the mesh.
-                    if (mesh.bounds.Contains(region.point))
+                    if (mesh.bounds.Contains(region.Point))
                     {
                         // Start searching from some triangle on the outer boundary.
                         searchtri.tri = dummytri;
@@ -173,17 +173,17 @@ private void CarveHoles()
                         // region point falls within the starting triangle.
                         searchorg = searchtri.Org();
                         searchdest = searchtri.Dest();
-                        if (predicates.CounterClockwise(searchorg, searchdest, region.point) > 0.0)
+                        if (predicates.CounterClockwise(searchorg, searchdest, region.Point) > 0.0)
                         {
                             // Find a triangle that contains the region point.
-                            intersect = mesh.locator.Locate(region.point, ref searchtri);
+                            intersect = mesh.locator.Locate(region.Point, ref searchtri);
                             if ((intersect != LocateResult.Outside) && (!searchtri.IsInfected()))
                             {
                                 // Record the triangle for processing after the
                                 // holes have been carved.
                                 regionTris[i] = searchtri.tri;
-                                regionTris[i].label = region.id;
-                                regionTris[i].area = region.area;
+                                regionTris[i].label = region.Label;
+                                regionTris[i].area = region.Area;
                             }
                         }
                     }