This question was answered here:

https://groups.google.com/forum/m/#!topic/geomorph-r-package/_RqlvyC8LQ4

On Sunday, 2 October 2016, Matt Caruana <[email protected]> wrote:

> Hi All,
>
> I'm new to this group and have a question about semilandmark placement in
> geomorph that I hope someone might be able to provide a bit insight on. I
> understand the basic concept of 'automating' semilandmark placement through
> the buildtemplate and digitsurface functions. However, after I construct a
> template for semilandmark placement (buildtemplate) and then use the
> digitsurface function to apply semilandmakrs on other specimens, they
> either clump together or are dispersed into space, i.e. not making contact
> with scan mesh surfaces.
>
> My PLY files are of Acheulean Handaxes, and are 'centered' at (0, 0, 0,)
> before-hand. They vary in size of course, but not dramatically.
>
> My instinct is that the landmarks I place to outline my specimens are not
> 'homologous'? There are no designated (or agreed upon) landmark features on
> handaxes aside from maximal tip and base points. However, 2 landmarks
> doesn't seem to be enough points to disperse semilandmarks across scan
> surfaces.
>
> Any insight would be a great help!
>
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-- 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Emma Sherratt, PhD.


Postdoctoral Researcher in the Keogh Lab
<http://biology-assets.anu.edu.au/hosted_sites/Scott/>
Division of Evolution, Ecology & Genetics
Research School of Biology
116 Daley Road
The Australian National University
Acton, ACT  2601
AUSTRALIA

email: [email protected]
office tel: +61 2612 53029
mob: +61 4234 19966
Twitter: @DrEmSherratt <https://twitter.com/DrEmSherratt>
co-author of geomorph R package: Software website
<http://geomorphr.github.io/geomorph/> | CRAN website
<https://cran.r-project.org/web/packages/geomorph/> | googlegroups
<https://groups.google.com/d/forum/geomorph-r-package>

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