unionCollection static method

Geometry unionCollection({
  1. required List<Geometry> geometries,
})

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,
  )!;
}