I am doing exercise "Troubleshoot Datum shift" in certificate "Working with Coordinate Systems in ArcGIS"
I converted the datum to have the point hydrants in the parcels (as per instructions):
Then the problem occurs because some of the hydrants are just a bit outside of the parcels, and not inside.
As per instructions, I change from NAD27 to NAD83 under "Coordinate Systems" and I get the following message:
After I click Yes, all the hydrants are inside the parcels.
However, I experimented for my own interest: I didn't do the data transformation but skipped to the step of changing from NAD27 to NAD83. The results is the same. Thus, what is the purpose of going through the data transformation?