vrm: Vector Ruggedness Measure (VRM)
In spatialEco: Spatial Analysis and Modelling Utilities

View source: R/vrm.R

vrm	R Documentation

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 <jeffrey_evans@tnc.org>

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))

spatialEco documentation built on Nov. 18, 2023, 1:13 a.m.