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I have converted data from NAD83 (CSRS) 1997 to NAD83 (CSRS) 2010, along with this conversion, vertical handling is converting the z values to CGVD2013.

I am now trying to reverse the transformation. I am able to successfully reverse the horizontal values using the (Reversed) transformation option. I am wondering if there is a reversed option for vertical .gdc files? or is a new file altogether required?

I am having no luck finding information online for this.

Hi @michoo,

The Vertical Handling option 'Orthometric height -> Geocentric or ellipsoidal height' is the reverse of 'Geocentric or ellipsoidal height -> Orthometric height'. You should choose the same grid file for each.

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