TAPES-G - A GRID-BASED TERRAIN ANALYSIS PROGRAM FOR THE ENVIRONMENTALSCIENCES

TAPES-G is a grid-based terrain analysis program that computes slope, aspect, upslope contributing area, profile and plan curvature and seve ral other topographic attributes for each cell of a square-grid digita l elevation model (DEM). These topographic attributes can be used to r epresent key physical processes in a form simple enough to allow model ing at catchment and larger scales. The program creates initially a de pressionless DEM if desired. Upslope contributing area can be calculat ed using either the classical D8 algorithm, the quasi-random Rho8 algo rithm, the multiple flow direction FD8/FRho8 algorithm or Costa-Cabral and Burges's stream tube-based DEMON algorithm. Stream networks, sub- catchments and the spatial distribution of individual attributes can b e plotted interactively or copied to the ARC/INFO geographic informati on system (GIS) for further processing. Copyright (C) 1996 Elsevier Sc ience Ltd.