Store uncertainty information in a Region astSetUnc
"
uncertainty"
which specifies the uncertainties
associated with the boundary of the Region. This information is supplied in the form of
a second Region. The uncertainty in any point on the boundary of a Region is found by
shifting the associated "
uncertainty"
Region so that it is centred at the boundary
point being considered. The area covered by the shifted uncertainty Region then
represents the uncertainty in the boundary position. The uncertainty is assumed to be
the same for all points.
The uncertainty is usually specified when the Region is created, but this function allows it to be changed at any time.
"
this"
.