Angularity is actually a well-studied aspect of form in the field of
shape analysis, just not in the field of geometric morphometrics. Yes, I
think that's odd too, but life is full of odd things. Regardless, you
can find discussions of this issue in the following references. Probably
there are more recent review treatments, but these are the ones that
come to mind off the top of my head.
With kind regards.
Norm MacLeod
MacLeod, N. 2002: Geometric morphometrics and geological
form-classification systems. Earth-Science Reviews 59:27–47.
Blott, S. J., and K. Pye. 2008: Particle shape: A review and new methods
of characterization and classification. Sedimentology 55:31–63.
Ondřej Mikula wrote on 09/03/2021 04:29:
Dear morphometricians,
is there any measure expressing how angular is an object in its shape?
I am not aware of any, but at the same time this is exactly what one
would expect to find in the geometric morphometrics toolkit.
Determination keys sometimes say "skull has more angular shape",
Merriam-Webster dictionary gives the sentence "he has an angular face"
as an example for the word "angular" and everyone can easily imagine
what it means. But how to quantify the angularity of shape?
Best regards,
Ondrej
--
Ondřej Mikula
Institute of Vertebrate Biology
Czech Academy of Sciences
Studenec 122, 67502 Konesin, Czech Republic
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