/// <summary>
        /// This function calculates the bitmask value for the tile, allowing us to assign is a tile
        /// </summary>
        /// <param X pos of tile on grid="x"></param>
        /// <param y pos of tile on grid="z"></param>
        /// <returns></returns>
        private int calculateTileBitmaskValue(int x,int z)
        {
            //Begin by assuming tile is water
            int bitmaskValue = 15;

            float tileHeight = terrainHeights[x, z];

            if (getIsLand(tileHeight))
            {
                //The tile is land, let's check surrounding neighbours.
                bool north_tile = getIsLand(terrainHeights[x, z - 1]);
                bool east_tile = getIsLand(terrainHeights[x+1, z]);
                bool west_tile = getIsLand(terrainHeights[x-1, z]);
                bool south_tile = getIsLand(terrainHeights[x, z + 1]);

                //Calculate our bitmask value from our boolean values for each direction:
                bitmaskValue = ((1 * Convert.ToInt32(north_tile)) + (2 * Convert.ToInt32(west_tile))
                    + (4 * Convert.ToInt32(east_tile)) + (8 * Convert.ToInt32(south_tile)));

            }

            return bitmaskValue;
        }