----- Forwarded message from a.vanhete...@roehampton.ac.uk -----
Date: Tue, 15 Jan 2013 03:42:48 -0500
From: a.vanhete...@roehampton.ac.uk
Reply-To: a.vanhete...@roehampton.ac.uk
Subject: RE: Fwd:
To: morphmet@morphometrics.org
Dear Donald Lewis
This is easily calculated using the Pythagoras theorem. Calculate the
difference between the x coordinates of the two landmarks of interest and call
this X, so X=x(glabella)-x(opisthocranion), do the same for the y and z
coordinates (let's call these Y and Z). Then, the distance
g-op=(X^2+Y^2+Z^2)^0.5. I presume you set your microscribe to measure in mm, if
so, you should divide your answer by 10 to get cm. If I am not mistaking, PAST
can calculate all distances between all landmarks in one go (the EDMA
function), but I am not sure how well they are labelled, so it might not be
easy to find your distance of interest in the long list.
I hope this helps.
Best wishes,
Anneke van Heteren
________________________________________
From: morphmet_modera...@morphometrics.org
[morphmet_modera...@morphometrics.org]
Sent: 15 January 2013 03:11
To: morphmet@morphometrics.org
Subject: Fwd:
----- Forwarded message from "Lewis, Dr. Donald" -----
Date: Fri, 11 Jan 2013 15:14:56 -0500
From: "Lewis, Dr. Donald"
Reply-To: "Lewis, Dr. Donald"
Subject:
To: morphmet@morphometrics.org
Dear Colleagues,
I am using a MicroScribe to obtain 3D coordinate data of hominid skulls.
In the set-up, one must select the measurement unit, and I choose
metric.
Implied therein is the fact that I could derive a true measurement from
the data, not just a point to be used in Morphologika,
EVAN toolbox, etc.
Therefore, using just a simple example, if I have the coordinates for
glabella and also for opisthocranion,
how do I find the related numeric value for g-op in cm?
Thanks to all,
Best Regards,
Don Lewis
Illinois, USA
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