We have been using TerraFlex recently to collect some GIS data in the field. We have also realized that TerraFlex gives us HOE for the Z values. I believe I have figured out how to get from the HOE value TerraFlex gives us to NAD83 ellipsoid height, however then when I go to do a vertical datum transformation from NAD83 to NAVD88 I keep getting these error messages:
Error 999999: Error executing function.
invalid extent for output coordinate system
The Project method cannot do a datum transformation.
When I put in my parameters I set the XY coordinate system to the same (NAD83) and change the Z coordinate system from NAD83 to NAVD88 and the transformation using the GEOID12B model come up, yet I still get this error.
What am I doing wrong?