ShapePreservingArea(Geometry) Method
Calculates the area of the geometry on the surface of the Earth ellipsoid. This method
preserves the shape of the geometry in its coordinate system.
Public Overloads Function ShapePreservingArea( _
ByVal As Geometry _
) As Double
Parameters
- geometry
- The input geometry. Cannot be null and its spatial reference cannot be null.
Return Value
The calculated shape preserving area of the geometry in square meters. If the geometry is empty, then zero is returned.
Calculate area of geometry on surface of Earth's ellipsoid - ShapePreservingArea
// pt
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 3.0, SpatialReferences.WebMercator);
double area = GeometryEngine.Instance.ShapePreservingArea(pt); // area = 0
List<MapPoint> pts = new List<MapPoint>();
pts.Add(MapPointBuilderEx.CreateMapPoint(1.0, 1.0, 3.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(1.0, 3.0, 3.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(3, 3, 3.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(3.0, 1.0, 3.0));
// multipoint
Multipoint mPt = MultipointBuilderEx.CreateMultipoint(pts);
area = GeometryEngine.Instance.ShapePreservingArea(mPt); // area = 0
// polyline
Polyline polyline = PolylineBuilderEx.CreatePolyline(pts);
area = GeometryEngine.Instance.ShapePreservingArea(polyline); // area = 0
// polygon
Polygon polygon = PolygonBuilderEx.CreatePolygon(pts, SpatialReferences.WGS84);
area = GeometryEngine.Instance.ShapePreservingArea(polygon);
polygon = PolygonBuilderEx.CreatePolygon(pts, SpatialReferences.WebMercator);
area = GeometryEngine.Instance.ShapePreservingArea(polygon);
polygon = PolygonBuilderEx.CreatePolygon(new[]
{
MapPointBuilderEx.CreateMapPoint( -170, 45),
MapPointBuilderEx.CreateMapPoint( 170, 45),
MapPointBuilderEx.CreateMapPoint( 170, -45),
MapPointBuilderEx.CreateMapPoint( -170, -54)
}, SpatialReferences.WGS84);
var area_meters = GeometryEngine.Instance.ShapePreservingArea(polygon);// , AreaUnits.SquareMeters);
var area_miles = GeometryEngine.Instance.ShapePreservingArea(polygon, AreaUnit.SquareMiles);
// area_meters - 352556425383104.37
// area_miles - 136122796.848425
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.