Terrain Analysis Overview

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•Fill and Shave DEM: smooth the DEM;
•Surface Derivatives: derive a set of surface variables from the DEM;
•Flow Direction: calculate the flow direction
•Flow Accumulation-Single Direction: calculate the flow accumulation using single flow direction algorithm
•Flow Accumulation-Multiple Direction: calculate the flow accumulation using multiple flow direction algorithm (based on Qin et al. 2007, IJGIS)
•Wetness Index: calculate the wetness index
•Catchment: delineate catchment areas
•Terrain Partition: divide the terrain into slope partitions
•Terrain Positions:identify different terrain positions