Dear list,
my intuition is that as long as you define a valid notion of distance on the
object of interest, in this case a bone, you can do Kriging.
The idea is that the variogram/covariance function does not `know` how
your point pair distance is obtained anyway, so the positive definiteness is
not spoiled by changing your distance function.
A valid notion of distance is obtained by making sure that your distance
function
fulfills the requirement of a metric:
http://mathworld.wolfram.com/Metric.html
that is, triangle inequality should hold, etc.
good luck, Roderik Lindenbergh
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