GEOMETRY AND CAD / FIELD NOTE 05
Dome vs Saddle Curvature in Aluminum Cladding
A dome and a saddle can both have two principal curvatures. They differ in the signs of those curvatures, which affects the way the surface departs from a plane and how a sheet must change shape during forming.
What to check on your project
Send sections through both directions and retain the oriented surface in the model. Identify transitions where one curvature approaches zero. A pair of radius labels is only a starting description for a freeform panel.