id Readonly
id: "GEOID" | "ELLIPSOID" | "NGVD29" | "NAVD88" | "LOCAL_ELLIPSOID"
Vertical CRS Key name. The only supported values are currently "GEOID", "ELLIPSOID", "NAVD88", "NGVD29" and "LOCAL_ELLIPSOID". GEOID indicates elevations are to be interpreted relative to the local Geoid of the dataset. It can also be considered to be Mean Sea Level. NAVD88 is the local geoid model for the USA. This vertical datum can only be used if the horizontal portion is based on a datum variation of NAD83, NAD27, NSRS2007 and NSRS2011. NGVD29 is the former local geoid model for the USA. This vertical datum can only be used if the horizontal portion is based on a datum variation of NAD83, NAD27, NSRS2007 and NSRS2011. ELLIPSOID indicates that elevations are relative to the surface of the WGS84(or current coincident) ellipsoid. LOCAL_ELLIPSOID indicates that elevations are relative to the surface of the local ellipsoid used by the horizontal CRS. It can only be used for datums that are not considered coincident vertically with WGS84. Use of this vertical datum is strongly discouraged.
Defined in
Last Updated: 14 November, 2024