I found that sometimes Bounding Box does not complete parcel geometry, when the geometry is just a small part of the time the original surface (surface is trimed), which is much smaller than the original geometry.
I think I can understand the reason for this situation, when I ShrinkTrimmedSrf in rhino ,Re-done once, the result will be improved a lot.
But there are still two questions:
recommend adding Shrink function in GH, similar Shrink in rhino，is a good improvement
2.Is it possible to improve the accuracy of the calculation of Bounding Box？