A custom geographic transformation in ArcMap is incorrect

Last Published: April 25, 2020


After defining a custom geographic (datum) transformation, the results are incorrect or a dataset doesn't line up properly with other data.


The Y translation (dy) transformation parameter is always set to zero by the transformation process. This parameter can be viewed in the status text at the bottom of the dialog.


This is addressed in ArcGIS Service Pack 2.

    Article ID:000007388

    • ArcMap 9 x

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