Dimension Feature Class in Planar Mode Want to Change to Geodesic Mode

[AmandaPesel]

Hi,

I am dimensioning in ArcGIS Pro 2.8 in feet in planar mode, but I want to show the dimension the value in geodesic mode. I have tried changing the number the attribute table by changing USE CUSTOM LENGTH field to 1 and changing the value of the dimension in CUSTOM LENGTH field. In the screenshot below, the dimension is 36 feet measured in the planar mode, but I want the dimension to say 26 feet in the geodesic mode. When I changed it in the CUSTOM LENGTH field, the dimension shows it is 85 feet. Do you know what is going on here?

Thanks,

  

[DanPatterson]

Web Mercator coordinate system?

[AmandaPesel]

The Web Mercator Coordinate system is WGS 1984 Web Mercator (auxiliary sphere).

[DanPatterson]

totally not the projection to use for anything entailing measurements (Google it or look on the forum)

I don't think arc* anything corrects for measurements on this projection

Measuring distances and areas when your map uses the Mercator projection (esri.com)