vrm {spatialEco}

Vector Ruggedness Measure (VRM)

Description

Implementation of the Sappington et al., (2007) vector ruggedness measure

Usage

vrm(x, s = 3)

Arguments

x

A terra SpatRaster class object

s

Scale of window. Must be odd number, can represent 2 dimensions (eg., s=c(3,5) would represent a 3 x 5 window)

Details

This function measures terrain ruggedness by calculating the vector ruggedness measure

Value

A terra SpatRaster class object of the VRI

Author(s)

Jeffrey S. Evans <[e-mail]>

References

Sappington, J.M., K.M. Longshore, D.B. Thomson (2007). Quantifying Landscape Ruggedness for Animal Habitat Analysis: A case Study Using Bighorn Sheep in the Mojave Desert. Journal of Wildlife Management. 71(5):1419-1426

Examples

library(terra)
elev <- rast(system.file("extdata/elev.tif", package="spatialEco"))
   vrm3 <- vrm(elev) 
   vrm5 <- vrm(elev, s=5)
   plot(c(vrm3, vrm5))