Vector Ruggedness Measure (VRM)
Implementation of the Sappington et al., (2007) vector ruggedness measure
vrm(x, s = 3, file.name = NULL, ...)
x |
Elevation raster 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) |
file.name |
Name of output raster (optional) |
... |
Additional arguments passed to writeRaster |
raster class object or raster written to disk
This function measures terrain ruggedness by calculating the vector ruggedness measure
Jeffrey S. Evans <jeffrey_evans@tnc.org>
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
library(raster) data(elev) vrm3 <- vrm(elev) vrm5 <- vrm(elev, s=5) plot(stack(vrm3, vrm5))
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