While lidar data density varied according to scan height above the surface, topography and the presence of swath overlaps, the spatial resolution of the entire dataset was esti-mated to be∼1.15 pointsm−2 . Nineteen colour photographs
at a scale of approximately 1 : 8000 were selected from the 2003 sortie total to provide adequate stereo coverage of the glacier, forefield and surrounding mountains (Fig. 2).