API Reference > core-frontend > Tiles > TileTreeReference > createGeometryTreeReference createGeometryTreeReference Method Obtain a tile tree reference equivalent to this one that also supplies an implementation of GeometryTileTreeReference.collectTileGeometry, or undefined if geometry collection is not supported. Currently, only terrain and reality model tiles support geometry collection. createGeometryTreeReference(): undefined | GeometryTileTreeReference note Do not override this method - override TileTreeReference._createGeometryTreeReference instead. Returns - undefined | GeometryTileTreeReference Defined in core/frontend/src/tile/TileTreeReference.ts Line 272 Last Updated: 20 May, 2022