unionCollection static method
Calculates the union of a collection of geometries.
The union combines those parts of the input geometries which overlap into a single geometry.
If the collection contains geometries of differing dimensionality, the geometry with the higher dimensionality is returned. For example, a polygon is returned if the given a collection contains polygons, polylines, and points.
Supports true curves.
Parameters:
geometries
— A collection of geometries.
Return Value: The union of all the geometries in the given collection.
Implementation
static Geometry unionCollection({required List<Geometry> geometries}) {
_initializeArcGISEnvironmentIfNeeded();
final coreGeometries =
geometries.toMutableArray(valueType: _ElementType.geometry);
final objectHandle = _withThrowingErrorHandler((errorHandler) {
return runtimecore.RT_GeometryEngine_unionCollection(
coreGeometries._handle, errorHandler);
});
return Geometry._fromHandle(objectHandle)!;
}