API Reference > imodeljs-frontend > Tiles > TileTreeSupplier > isEcefDependent isEcefDependent Readonly isEcefDependent: undefined | "true" true if this supplier is dependent upon the IModelConnection's EcefLocation. Typically this returns true for suppliers of tile trees for map tiles. When the IModelConnection's ECEF location is modified (a relatively rare occurrence), all tile trees supplied by this supplier will be discarded, to be recreated using the updated ECEF location whenever they are next requested. Defined in core/frontend/src/tile/TileTreeSupplier.ts Line 33 Last Updated: 12 June, 2024