Previous studies identified adequate parameters to create the landform map of the area (Pinheiro et al.
The landform map (geomorphons) was created using the Geographic Resources Analysis Support System (GRASS) software (GRASS Development Team 2013) through the geomorphons algorithm (Jasiewicz and Stepinski 2013; the code can be downloaded from http://sil.
From landform map
, rocky terrain landform was extracted.
Classified terrain units were verified through a field based landform map
resulting in an accuracy of 70%.
Figure 4 illustrates landform map
in the study area.
They compared the results from both techniques with a landform map
created by manual airphoto delineations.
The interpretation of Radcliffe (1979) and the landform maps
produced by Tonkin (1984), however, infer that spur strata are defined as hillslope areas between convergent hollows.