I have looked everywhere and can not find a tool to convert a geotiff file to a simple ascii elevation file... did I miss something?
thanks for any pointers!
You should be able to do this using the
gdal_translate command line tool.
To convert to Arc/Info ASCII Grid:
gdal_translate -of AAIGrid elevation.tif elevation.asc
To convert to ASCII Gridded XYZ:
gdal_translate -of XYZ elevation.tif elevation.xyz
Binary executables of the GDAL tools are available here: http://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries