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Projection Workflow

Question asked by CADEngr2014 on Feb 24, 2019
Latest reply on Feb 26, 2019 by MKennedy-esristaff



I am using ArcMap 10.4.1.


After watching the ESRI video presentation titled "Introducing Coordinate Systems and Transformations", under the subtitle "What is Happening When We Project Data?", under Case 2: Each PCS contains a different GCS; describes the projection as Un-projecting PCS A1 to GCS A->Transforming Geographic Datum to GCS B->then Projecting to PCS B1 as shown graphically in the attached screen shot.   

After reviewing this information I am assuming that the ArcMap program is following this workflow, when the projection path is pre-defined.  If the path is not pre-defined, then manually following this method is a logical solution.  I have to ask if my understanding is correct; that the workflow presented may be a manual procedure if the projection path is not defined, following the above steps?