On Mon, Aug 22, 2011 at 3:32 PM, Seb <sebhudson at gmail.com> wrote: > Hi, > > The Aster DEM has 30m posting and covers most of the globe. > > http://free-gis-data.blogspot.com/2009/04/aster-global-digital-elevation-model.html Depending on where you are there are issues with ASTER GDEM: http://gis.cri.fmach.it/aster-gdem-quality/ Markus