Ian S. Evans

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Geomorphometry is the science of quantitative land-surface analysis (Pike, 1995, 2000a; Rasemann et al., 2004). It is a modern, analytical-cartographic approach to representing bare-earth topography by the computer manipulation of terrain height (Tobler, 1976, 2000). Geomorphometry is an interdisciplinary field that has evolved from mathematics, the Earth(More)
The land surfaces of Earth, of other planets and of moons show both scalespecific and scaling behaviour. Size and spacing of landforms often show clustering around characteristic scales or between limits related to process thresholds or to the space available. This is clearest for various bedforms, in dynamic equilibrium with the last dominant flow or(More)
In this paper, we introduce an algorithm to delineate elementary forms on Digital Elevation Models (DEMs). Elementary forms are defined by constant values of fundamental morphometric properties and limited by discontinuities of these properties. A multiresolution segmentation technique was customized to partition the layers of altitude derivatives into(More)
A hierarchical taxonomy of fundamental geomorphometric variables is proposed (Table 1) covering both those related to fields and those characterizing objects. The former include fieldspecific and field-invariant as well as local and regional variables. Local variables may be point-based or area-based. Variables for objects differ between areal, linear and(More)
Widespread loss of wetland ecosystems resulting from human land use highlights the need for a reclamation strategy that can sustain wetland ecosystem services. Since wetland function partly depends on landscape structure, reclamation and monitoring can be aided by knowing the differences in wetland configuration between undisturbed and disturbed landscapes.(More)
Exactness of results of geomorphometric research depends not only on measurement and computational exactness but also on exact definition of measured objects and exactness of interpretation of the geomorphometric variables. The need to consider all aspects of exactness in mutual relationships is exemplified from the use of third order local point-based(More)
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