API Reference > imodeljs-common > iModels > IModelProps IModelProps Interface Properties of an iModel that are always held in memory whenever one is opened, both on the frontend and on the backend . Implemented by IModel Properties Name Type Description ecefLocation undefined | EcefLocationProps The location of the iModel in Earth Centered Earth Fixed coordinates. geographicCoordinateSystem undefined | GeographicCRSProps The Geographic Coordinate Reference System indicating the projection and datum used. globalOrigin undefined | XYZProps An offset to be applied to all spatial coordinates. name undefined | string The name of the iModel. projectExtents undefined | Range3dProps The volume of the entire project, in spatial coordinates rootSubject RootSubjectProps The name and description of the root subject of this iModel Defined in core/common/src/IModel.ts Line 80 Last Updated: 29 November, 2022