Hello,
Another GIS specialist up to my neck in Coordinate System information here.
I have a number of questions related to the current realization of WGS1984(G1674).
When transforming between NAD83 (2011) and the original NAD83 (1986 or "CONUS") in ArcMap, compound transformations are listed. I understand this (transform to WGS/ITRF first and then back into the other NAD83 Epoch given the defined NGS conversion values). But in 10.4, the most suitable listed transformation is "WGS_1984_(ITRF00)_To_NAD_1983 + WGS_1984_(ITRF08)_To_NAD_1983_2011". Shouldn't the epoch of each WGS reference frame match? I don't see a choice for ITRF08_To_NAD83 + ITRF08_To_NAD83_2011. There is a choice for "WGS_1984_(ITRF00)_To_NAD_1983 + WGS_1984_(ITRF00)_To_NAD_1983_2011", but it is down the list in suitability, below the HARN transformations.