Hi,

I'm attempting to produce inundation maps (for an area in New Zealand) based on future sea level rise scenarios. I have a 1m DEM with the WGS_1984 datum but wish to work with a local datum (WVD_53). Working with the local datum would help me discern current mean sea level of this particular area with more accuracy. Is a transformation possible and how would I go about this?

Thanks, Helena

Yes, as of today (October 13, 2015) and ArcGIS 10.3.x, we do not support transformation of vertical coordinate systems, including between ellipsoidal heights and elevations/geoidal heights.