Topographic transects based on 1 arcsec SRTM data (Transect S, black line) and combined DGPS and theodolite data (Transects AeC, red line). Landforms are indicated by letters above transect (refer to Fig. 2 for further information and transect locations). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)