Landform delineated into ten classifications types: 1) Canyons, Deeply Incised Streams; 2) Midslope Drainages, Shallow Valleys; 3) Upland Drainages, Headwaters; 4) U-shape valleys; 5) Plains; 6) Open Slopes; 7) Upper Slopes; 8) Local Ridges/Hills in Valleys; 9) Midslope Ridges, Small Hills in Plains; 10) High Ridges, Mt Tops.

The algorithm generates a multi-scale Topographic Position Index, classifying this index into slope position and landform types, and using the Topographic Position Index to characterize watersheds. The following link provides a technical explanation concerning the calculation of the landform classification output: http://www.jennessent.com/downloads/tpi-poster-tnc_18x22.pdf The landform classification output was produced using using the GIS software “System for Automated Geoscientific Analyses (SAGA version 2.08)” using the 'TPI Based Landform Classification' module. The 1-arc second digital elevation model (Gallant et al., 2011) was used as input to the algorithm and the default settings accepted. References: Gallant, J., Dowling, T. I., Read, A., Wilson, N. & Tickle, P. (2011) 1 second SRTM Derived Digital Elevation Models User Guide. Canberra: Geoscience Australia. Guisan, A., Weiss, S.B., Weiss, A.D. (1999): GLM versus CCA spatial modeling of plant species distribution. Plant Ecology 143: 107-122. Wilson, J.P. & Gallant, J.C. (2000): Terrain Analysis - Principles and Applications.