# existingPlaneUsingExtent A point on a real-world plane (already detected with the [`planeDetection`](/documentation/ARKit/ARWorldTrackingConfiguration/planeDetection-swift.property) option), respecting the plane’s estimated size. ``` static var existingPlaneUsingExtent: ARHitTestResult.ResultType { get } ``` ## Discussion When searching for this result type, ARKit returns a point coplanar with an already detected plane only if that point lies within the area defined by the plane’s [`center`](/documentation/ARKit/ARPlaneAnchor/center) and [`extent`](/documentation/ARKit/ARPlaneAnchor/extent) properties. Those properties (together with the anchor’s [`transform`](/documentation/ARKit/ARAnchor/transform)) define the smallest rectangular area that includes all regions ARKit estimates to be a part of the plane. However, that rectangular area may contain regions that are not part of the same real-world surface. There may also be parts of the same real-world surface that lie outside the rectangle because ARKit has not yet recognized them as part of the same plane. You can get a more precise estimate of the plane area ARKit has recognized by testing with the [`existingPlaneUsingGeometry`](/documentation/ARKit/ARHitTestResult/ResultType/existingPlaneUsingGeometry) type, or extend your hit test to an infinite plane with the [`existingPlane`](/documentation/ARKit/ARHitTestResult/ResultType/existingPlane) type. An existing plane search can return any number of results, depending on how many already-detected planes the hit test ray intersects (if any). --- 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)