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Intern. 
A NEW 
KEY WORDS: S 
bration, Fusior 
ABSTRACT 
Surfaces play : 
monitoring, ar 
must be proce 
case, the two s 
the reference s 
one surface an 
points and sur 
representation 
We then apply 
operational so 
of our matchir 
determined by 
As a natural ex 
There is an inc 
of digital surfa 
tal orthophoto: 
example. More 
that poses a c 
play also an im 
as ice sheet mc 
and satellite sc 
Surfaces are ty| 
This is certain 
stereo photogr 
tion is a set of 
description. In 
bution is irreg 
example break 
The set of poi 
hardly a useful 
sic operations | 
of the first ster 
a resampling p 
lating the origi 
cause most eve 
spaced data. 
In one way or a 
parison betwee 
ibrating data a 
ison between t 
face (e.g. test f 
faces sampled 
data sets forac 
control; a data 
must be transf 
Surface compa