Centroid Method (IGeometryEngine)
Gets the centroid (center of gravity) of the geometry.
Parameters
- geometry
- The input geometry.
Return Value
Returns the centroid of the geometry.
Find the centroid of geometries
// simple polygon
List<Coordinate2D> list2D = new List<Coordinate2D>();
list2D.Add(new Coordinate2D(0, 0));
list2D.Add(new Coordinate2D(0, 2));
list2D.Add(new Coordinate2D(2, 2));
list2D.Add(new Coordinate2D(2, 0));
Polygon polygon = PolygonBuilderEx.CreatePolygon(list2D, SpatialReferences.WGS84);
// verify it is simple
bool isSimple = GeometryEngine.Instance.IsSimpleAsFeature(polygon);
// find the centroid
MapPoint centroid = GeometryEngine.Instance.Centroid(polygon);
// centroid.X = 1
// centroid.Y = 1
// map Point
MapPoint pt1 = MapPointBuilderEx.CreateMapPoint(1, 2, 3, 4, SpatialReferences.WGS84);
MapPoint pt2 = MapPointBuilderEx.CreateMapPoint(5, 2, double.NaN, 7);
// pt1.HasZ = true
// pt1.HasM = true
centroid = GeometryEngine.Instance.Centroid(pt1);
// centroid.HasZ = true
// centroid.HasM = true
// pt1.IsEqual(centroid) = true
// multipoint
List<MapPoint> list = new List<MapPoint>() { pt1, pt2 };
Multipoint multipoint = MultipointBuilderEx.CreateMultipoint(list);
// multipoint.HasZ = true
// multipoint.HasM = true
centroid = GeometryEngine.Instance.Centroid(multipoint);
// centroid.X = 3
// centroid.Y = 2
// centroid.HasZ = false
// centroid.HasM = false
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.