This is found most appropriate for detecting structural anisotropy in a surface.
Characterisation tools are evaluated by applying them to uncorrelated surfaces, fractal surfaces and Ordnance Survey DEMs of Lake District, Peak District and Dartmoor.
This plateau is characterized by denudation processes associated with a semiarid climate, including the formation of subsurface hollows and caves.
The second phase, which began after the last Alpine Orogenic movement, and includes the Pliocene and Quaternary periods, formed a younger plateau developed on the Zahra formation.
The study demonstrates that the present surface of the Iraqi Western Desert overall forms an incised plateau developed during two phases of continental erosion and deposition during the Tertiary and Quaternary periods.
The first phase started after Oligocene uplift formed an older plateau within the Oligocene Tayarat formation.
DEMs are parameterised using first and second derivatives of quadratic surfaces fitted over a range of scales.
This offers advantages over traditional methods based on a 3 by 3 local window, as geomorphometric form can be characterised at any scale.
Morphometric parameters are combined to give a feature classification that may also be applied over a range of scales.
Multi-scale measurements are combined to give a feature membership function that describes how properties change with scale.