API Reference > imodeljs-common > Geometry > HorizontalCRSProps HorizontalCRSProps Interface Horizontal Geographic Coordinate Reference System definition Implemented by HorizontalCRS Properties Name Type Description datum undefined | GeodeticDatumProps The complete definition of the geodetic datum referred to by datumId. datumId undefined | string The identifier of the geodetic datum as stored in the dictionary or the service database. deprecated undefined | boolean If true then indicates the definition is deprecated. description undefined | string Description ellipsoid undefined | GeodeticEllipsoidProps The complete definition of the geodetic datum referred to by datumId. ellipsoidId undefined | string The identifier of the geodetic ellipsoid as stored in the dictionary or the service database. epsg undefined | number The EPSG code of the CRS. extent undefined | HorizontalCRSExtentProps Extent representing the domain of application of the CRS. id undefined | string The identifier of the horizontal CRS as stored in the dictionary or the service database name undefined | string Used only for user-defined definitions that will typically use a GUID as id. projection undefined | ProjectionProps Projection including projection parameters. source undefined | string A textual description of the source of the CRS definition. unit undefined | UnitType The text indicating the unit used. Defined in core/common/src/geometry/CoordinateReferenceSystem.ts Line 80 Last Updated: 12 June, 2024