# itemForGeometryCollection(item, object) Overrides a geometry collection with the provided item and object. ``` itemForGeometryCollection?( item: ItemCollection, object: D, ): ItemCollection | Item[] | null; ``` ## Parameters `item` An item the system creates for the geometry of the geometry collection. `object` The original GeoJSON object for the `feature`. ## Return Value A map item for the geometry collection. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)