Coordinate Reference Systems
Remarks
File also available in NOAA VDatum format (Icegeoid_ISN2004.gtx). For reversible alternative to this transformation see ISN2004 to ISN2004 + ISH2004 height (1) (CT code 9957). Replaces Icegeoid_ISN93 (code 9954). Replaced by Icegeoid_ISN2016 (code 9958).
Frequently Asked Questions
What is the accuracy of the ISN2004 to ISH2004 height transformation?
This transformation (EPSG:9956) has an accuracy of 0.05m using the Geographic3D to GravityRelatedHeight (Gravsoft) method. Area of use: Iceland - onshore.