/// <summary>
/// Returns the area of the rectangle in square metres.
/// </summary>
/// <param name="radius">The radius of the spheroid.</param>
/// <returns>The area in square metres.</returns>
public double GetArea(double radius)
{
Point southWest = new Point(SouthWest.Latitude, SouthWest.Longitude);
Point northEast = new Point(NorthEast.Latitude, NorthEast.Longitude);
Point southEast = new Point(SouthWest.Latitude, NorthEast.Longitude);
Point northWest = new Point(NorthEast.Latitude, SouthWest.Longitude);
return(MapsUtils.GetArea(new IPoint[] { northEast, northWest, southWest, southEast }, radius));
}
/// <summary>
/// Returns the area of the specified <paramref name="polygon"/> measured in sqaure metres.
/// </summary>
/// <param name="polygon">The polygon.</param>
/// <returns>A <see cref="double"/> representing the area in square metres.</returns>
/// <remarks>For this method to work, it is assumed that coordinates are specified using the
/// <strong>WGS 84</strong> coordinate system (eg. used by the Global Positioning System).</remarks>
/// <see>
/// <cref>https://en.wikipedia.org/wiki/World_Geodetic_System#WGS84</cref>
/// </see>
/// <see>
/// <cref>https://en.wikipedia.org/wiki/Global_Positioning_System</cref>
/// </see>
/// <exception cref="ArgumentNullException"><paramref name="polygon"/> is <c>null</c>.</exception>
public static double GetArea(WktPolygon polygon)
{
if (polygon == null)
{
throw new ArgumentNullException(nameof(polygon));
}
// Get the overall area from the outer points
double area = MapsUtils.GetArea(polygon.Outer.Select(x => new Point(x.Y, x.X)));
// Substract the area of the inner points
foreach (WktPoint[] inner in polygon.Inner)
{
area -= MapsUtils.GetArea(inner.Select(x => new Point(x.Y, x.X)));
}
return(area);
}
/// <summary>
/// Returns the area of the polygon in square metres.
/// </summary>
/// <returns>The area in square metres.</returns>
public double GetArea()
{
return(MapsUtils.GetArea(Outer));
}