API Reference > imodeljs-frontend > Tiles > TileTree > modelId modelId Readonly modelId: string A 64-bit identifier for this tile tree, unique within the context of its IModelConnection. For a tile tree associated with a GeometricModelState, this is the Id of the model. Other types of tile trees typically use a transient Id obtained from IModelConnection.transientIds. Defined in core/frontend/src/tile/TileTree.ts Line 64 Last Updated: 11 June, 2024