person("John R.", "Tipton", role = c("aut"),
Description: Algorithms for the spatial stratification of landscapes, sampling and modeling of
spatially-varying phenomena. These algorithms offer a simple framework for the stratification
of geographic space based on raster layers representing landscape factors and/or factor scales.
The stratification process follows a hierarchical approach, which is based on first level units
(i.e., classification units) and second-level units (i.e., stratification units). Nonparametric
techniques allow to measure the correspondence between the geographic space and the landscape
configuration represented by the units. These correspondence metrics are useful to define
sampling schemes and to model the spatial variability of environmental phenomena. The
theoretical background of the algorithms and code examples are presented in Fuentes, Dorantes,
(>= 3.3.5), grDevices, histogram (>= 0.0.25), KernSmooth (>=

person("Andrew G.", "Brown", role = "ctb",