
I have done some work on getting region to use the image projection
for the dvo display.  The pieces are almost there, except:

* there is apparently a small offset between the two systems?

* SelectRegions relies on the values of xmax and ymax being degrees
  from a 0,0 coordinate.  this is a little tricky: this should not
  fail for large AITOFF projections.

* kapa does not do non-linear projections
* kapa does not do multi-level projections

