Land surface derivatives

TitleLand surface derivatives
Publication TypeConference Paper
Year of Publication2013
AuthorsEvans, I.
Refereed DesignationRefereed
Conference NameGeomorphometry 2013
Date Published2013
Conference LocationNanjing, China
Abstract

The use of derivatives in geomorphometry is reviewed. For first and second derivatives (slope and curvatures) of the land surface, represented by a square-grid DEM, use of a quadratic based on nine points is recommended. For detailed analysis of slope gradient, maximum slope (based on two points) may be useful: but only if the DEM is very accurate. For curvature, streamline (rotor) curvature should be added to profile and plan curvature. The system of local point-based variables in the gravity field is now extended to third derivatives.

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