add extensions

MapBox Extension/MapBox_Typings.cs

@@ -0,0 +1,17 @@
+using GeoJSON.Net.Geometry;
+using Mapbox.Utils;
+
+
+namespace Virgis {
+
+    public static class MapboxExtensionMethods {
+        /// <summary>
+        /// Converts Iposition to Vector2D
+        /// </summary>
+        /// <param name="position">IPosition</param>
+        /// <returns>Mapbox.Utils.Vector2d</returns>
+        public static Vector2d Vector2d(this IPosition position) {
+            return new Vector2d(position.Latitude, position.Longitude);
+        }
+    }
+}