Hi Bruce You might want to use the SRTM data, which is freely available, altough not in very high resolution. Best, Tinu -- Dr. Martin Lüthi luethi@vaw.baug.ethz.ch VAW Glaciology http://www.glaciology.ethz.ch ETH Zürich http://people.ee.ethz.ch/~luthi 8092 Zürich +41 44 632 4093 phone Switzerland +41 44 632 1192 fax