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Datum transformation

Question asked by EninnaLuli on May 24, 2016
Latest reply on May 27, 2016 by MKennedy-esristaff

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?

 

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