Dear Eli,
your question goes beyond pure methodological issues and the answer
depends first on what you want to do.
I suggest everyone interested to read the two papers I've uploaded here:
https://drive.google.com/file/d/0BxZeFy3y3MEpcHJzQlkxUlNwMEU/view?usp=sharing
https://drive.google.com/file/d/0BxZeFy3y3MEpVWFXR09sRGZQOWs/view?usp=sharing
A brief quote from the first one:
"The choice of landmarks should be driven by the hypotheses that are
being tested. It is possible to imagine situations where different
landmarks on the same structure are deemed equivalent or not according
to the question being asked. Thus, in a study of bat and bird wings if
one is interested in function, landmarks at wing tips and along the
leading and trailing edges may be functionally equivalent; they might
embody the question in being related to functionally relevant aspects
of form. However, these landmarks may lie on structures that are not
equivalent in other ways; for a study of growth or evolution,
alternative landmarks may be the most suited ones. Thus, equivalence
can mean different things according to the context; different sets of
landmarks from the same structure may well carry different information.
In evolutionary studies, all sets of landmarks may need to be combined
because, of course, function, growth, and other matters are all related
to evolution (Oxnard 2008)".
Among other many interesting considerations in the same paper and in the
other one, the gorilla example (Fig. 7 of the first one) is particularly
illuminating.
Good luck
Andrea
On 16/01/17 21:40, Elahep wrote:
Hello all,
Is this necessary/recommendable to use semilandmarks with intermediate
landmarks in order to improve the accuracy and consistency of
semilandmarks configuration?
Or is it enough to just anchor the first and the last semilandmarks
with fixed landmarks?
Many thanks in advance,
Eli
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Adjunct Associate Professor, School of Anatomy, Physiology and Human Biology,
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