please share your experience with DEM holes

[Bruce Raup]

Hi all,

We're looking into the question of DEM quality -- in particular, holes in 
DEMs as produced from ASTER data (including DEMs from EDC).  If you have 
ordered or created DEMs using software that leaves holes (that is, doesn't 
automatically interpolate all holes), could you please write us and let us 
know

- where most of the holes show up (e.g. accumulation area, north-facing 
  slopes, etc.)

- how this impacts your work (e.g. causes difficulty in identifying flow 
  divides, etc.)

- what you've done to get around the problem.

We're looking into a method to patch up DEMs that might be of benefit to 
the GLIMS community, and would like a better understanding of the nature 
of the problems faced by the GLIMS community in using ASTER-derived DEMs.

Thanks,
Bruce Raup and Siri Jodha Singh Khalsa

-- 
Bruce Raup
National Snow and Ice Data Center
University of Colorado
449 UCB,  Boulder, CO 80309
Phone:  303-492-8814
http://cires.colorado.edu/~braup/