Data Frame display units show as unknown units when set the reference scale in the data frame properties window after setting the display units to Degrees Minutes Seconds.
Last Published: August 19, 2020ArcGIS for Desktop
Bug ID Number
July 6, 2015
November 24, 2020
ArcGIS for Desktop
Operating System Version
Will Not Be Addressed
The development team has considered the issue or request and concluded it will not be addressed. The issue's Additional Information section may contain further explanation.
We apologize that we were unable to address this issue within the current product support cycle. If the issue continues to affect your work in a supported release, please contact Technical Support.
1. Set the Display Units to Degrees Minutes Seconds in the ArcMap Options > Data View tab.
2. Set the reference scale by right clicking on the data frame and selecting Reference Scale > Set Reference Scale.