I have read a lot of articles about datum transformations and am still confused about something.
I have GIS data that is in State Plane (Texas S. Central). I believe it uses the NAD83 datum. This is where my question comes in. Am I right in assuming that this is the Vanilla NAD83?
Now, I have collected GPS data that has been corrected against a TxDOT station, and therefore I assume that the corrected data is in ITRF00. Up until now, I have used the WGS84 (ITRF00) to NAD83_5 transformation for adding my GPS data to ArcMap because that is the latest transformation. However, since my data frame uses NAD83 (Vanilla, I think), then shouldn't I use the WGS84 (ITRF00) to NAD83_1 transformation, which is an earlier transformation with no shift?
Any assistance would be greatly appreciated.