Returns the topological union of the input geometries (uses ITopologicalOperator::ConstructUnion). The input geometries must have the same dimension (0d, 1d, 2d).
[Visual Basic .NET] Public Function Union ( _ ByVal pSR As ISpatialReference, _ ByVal pInGA As IGeometryArray _ ) As IGeometry
[C#] public IGeometry Union ( ISpatialReference pSR, IGeometryArray pInGA );
[C++]
HRESULT Union(
ISpatialReference* pSR,
IGeometryArray* pInGA,
IGeometry** ppUnionedGeometry
);
[C++]Parameters
pSRpSR is a parameter of type ISpatialReference
pInGApInGA is a parameter of type IGeometryArray
ppUnionedGeometry [out, retval]ppUnionedGeometry is a parameter of type IGeometry
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.
Remarks
This operation constructs the set-theoretic union of the geometries in the input array. All inputs must be of the same type.