RRIK3 {SurfRough} | R Documentation |
RRIK3: Radial Roughness index with differences of order 3
Description
Extension of RRI using differences of order 3 Accordingly, this version filters out a trend of order 2, so it reduces still more the dependence on slope and partially on curvature. The input is the DEM (no need to detrend).
Usage
RRIK3(x, ...)
## S3 method for class 'numeric'
RRIK3(x, ...)
## S3 method for class 'SpatRaster'
RRIK3(x, ..., .method = c("rcpp", "r"))
Arguments
x |
A DEM as a SpatRaster or a vector of numeric values from a focal window in a DEM from which to compute the index |
... |
reserved for future use |
.method |
Either |
Value
isotropic roughness (in the same units of input)
References
Trevisani S., Teza G., Guth P.L., 2023. Hacking the topographic ruggedness index. Geomorphology https://doi.org/10.1016/j.geomorph.2023.108838
Examples
library(terra)
dem= rast(paste(system.file("extdata", package = "SurfRough"), "/trento1.tif",sep=""))
roughRRIK3=RRIK3(dem)
plot(roughRRIK3)
[Package SurfRough version 0.0.1.1 Index]